Digital Camera Magazine的November 2018目录

Considerate flying ”When you’re flying, safety must always be your top priority. It’s your responsibility to find out about the local laws surrounding drone flight,” says Janek, who was able to fly in this unpopulated mountainous region with ease. If you’re scouting out an area that’s closer to settlements, be sure to check out the regulations. In the UK, for example, hobby fliers have to obey certain safety restrictions, and can’t go above 400ft or within 1km of an airport. If you’re planning on using your drone commercially, you’ll need a drone licence (called a PfCO) from a CAA-approved provider. Taking off The best place to launch your drone is in wide, open spaces away from people, buildings and official no-fly zones.…

1 MANUAL MODE Forests are static subjects, and Janek has plenty of time to control his creative exposures manually. 2 APERTURE Janek tries to use the 'sweet spot' for each of his lenses. A narrow aperture ensures plenty of detail is recorded. 3 ISO Using the E-M1 II’s lowest base ISO of 64 gives Janek the highest-quality image and the lowest amount of noise. 4 SHUTTER SPEED Shooting at sunrise or in misty conditions means that Janek often requires an extended exposure.…

Chris Bailey is a commercial photographer specialising in portraits, events and editorial images, with clients including Longleat, Vogue and Getty Images. He shot this portrait of Star Wars actor Alan Harris at the 2018 Frome Comic Con this August. “Alan played the infamous bounty hunter Bossk in The Empire Strikes Back, amongst other roles in the Star Wars franchise,” says Chris. “With that in mind, I wanted to try and capture an image of Alan with as much personality and character as possible. “I had the option to ask him to smile, but that wasn’t the mood I wanted to portray – and Alan has great eyes that I wouldn’t want to lose by him smiling. When some people smile or laugh, their eyes become a lot smaller.” www.flickr.com/photos/chrisbaileyphotography09 Lens choice…

1 Adobe Camera Raw From £9.98/$9.99 per month It’s the obvious tool for a whole generation of Photoshop users. It’s powerful, versatile and supports a vast range of cameras and lenses. It’s very much a linear process, though; if you want to be able to adjust your raw files ‘live’ indefinitely, Lightroom might be better. 2 Adobe Photoshop Lightroom CC From £9.98/$9.99 per month Lightroom uses the same processing engine and tools as Photoshop, but it’s designed to organise your whole image library and offer ‘live’ raw editing – you don’t have to process the image and export a JPEG or TIFF until you need it. 3 Phase One Capture One Pro 11 £289/$299, or from £18/$23 month on subscription Capture One Pro is a direct rival to Lightroom. It’s…

Benedict Brain Photographer Camera: Nikon D810 Lens: 60mm f/2.8 macro Exposure: 5 x 1/125 sec at f/11, ISO 10 www.benedictbrain.com To be honest, I’m not really sure why I like to collect stones. They hold an allure I find difficult to articulate in words, so I thought I’d try to express it through photography. These samples were all picked from beaches in Cornwall. Back in my ‘studio’ (box room), I struggled for a while to work out the best way to photograph them. After some experiments, I started getting the feeling I was looking for through multiple-exposure techniques. Placing the stones on a lightbox at slightly different angles, I took several shots that were layered together in-camera. I love the way the layers recede in tonality. It feels calm while…

1 Manual Although you can set the aperture, shutter speed and ISO yourself, the camera meter is still active. Watch the indicator change position on the exposure scale as you make adjustments to the settings. 2 Aperture Priority You set the aperture, and the camera sets a shutter speed it thinks will give the ‘correct’ exposure, based on the subject being metered. If necessary, use exposure compensation to override the meter. 3 Shutter Priority In this mode, you set the shutter speed and the camera sets the aperture. If you change the shutter speed, the camera will simply shift the aperture value to maintain the same level of exposure. 4 Program The camera will suggest an aperture and shutter speed combination to give a ‘correct’ exposure, and you can simply change its suggestions to…

Backlighting When a subject is lit from behind, it may end up looking darker than you intended in the picture. Use exposure compensation to correct this or switch to Centre-Weighted metering, as this will bias the exposure towards the subject (if they’re in the middle). Bright skies The contrast between a bright sky and a dark foreground can often be so strong that you will be unable to retain detail in both. The camera meter will either give you a well-exposed sky (and a dark foreground) or a well-exposed foreground (and an overly bright sky). Light source A strong light source in the picture can cause the meter to underexpose the rest of the scene. The answer is to exclude the light source, use exposure compensation to brighten the whole…

Cristina Mittermeier Conservation photographer Camera: Yashica J-P 35mm SLR Lens: Yashinon 50mm f/2.8 M42 Shot name: Lady with the Goose www.cristinamittermeier.com One of my most askedabout images, ‘Lady with the Goose’ was photographed in the Yunnan Province of China. I captured this Lisu woman from one of the Tibetan minorities, as she took her pet goose for a walk in a street market in Lijang. The image, made with an old single-reflex Yashica camera, always makes me smile. It’s an old-style camera I had just bought in the market, and I was learning how to use it. We were having lunch at the market, and there were other photographers. I took the Rollei with me, and was fooling around with it when I saw this woman walking towards me on…

Sean McCormack Sean McCormack is a photographer and writer, based in Galway on the west coast of Ireland. He’s the author of The Indispensable Guide to Lightroom CC. Colour-grading is a term that’s been borrowed from video editing rather than originating in stills photography. It refers to the final stage of adding a colour hue to a movie to give it a particular mood or feel – like the bluey-green palette you might instinctively associate with many urban or sci-fi dystopia movies. While it’s not technically the same process for a still image, it remains a close analogy. In the Instagram or Snapchat worlds, it’s like adding a filter. No, I don’t mean adding doggie faces to your photos! Lightroom Classic (or, for that matter, Camera Raw, which has broadly…

One raw file. Two artists. Free reign The original raw by Chris George This shot was taken with a Canon 40D using a 17-55mm f/2.8 lens at 48mm. The exposure is 1/180 sec at f/8, ISO 100. The face is what matters most here: nothing in the background, hair or clothing is allowed to distract from it. Raw warrior 1 wants to create… An Instagram-ready portfolio shot Sean McCormack Sean McCormack is a photographer, and the author of The Indispensable Guide to Lightroom CC. Raw warrior 2 wants to create… An OTT anime-style treatment James Paterson After a decade as a photographer and writer, James knows which Photoshop tools matter most. FILE & VIDEO Download the disc: www.bit.ly/dc209disc…

It’s common for photographers to believe that they’ve really nailed a landscape at the time of capture, but then feel a little underwhelmed by the very same shot when it’s up on their screen at home or in the studio. The cold light of another day adds a dose of objectivity, and the desire to somehow go back in time to recapture the shot with a few adjustments to your camera settings and setup can be strong. But before you repeat a long journey and hope to find the same good light you had before, there are a few Photoshop tricks you can try to enhance an image that’s not quite up there with your best. They don’t take long to learn and apply – and, once mastered, they can…

Andrew James Andrew is a highlyexperienced writer and photographer – if you have a problem, he is here to help. HDR without support Q Can I shoot HDR if I don’t have a tripod? Holly Braithewaite A It’s always going to be easier if you have a tripod: that way you can be sure the different images you are taking all align perfectly. If they don’t, it’s much harder for your HDR software to make them work – and it may not be possible at all. When you are handholding, some movement is inevitable, and the slower the shutter speed or the longer the time between each frame being taken, the greater the chance is that those images won’t align. I will shoot a series of images for HDR handheld if I…

SPECIAL The photography industry recently gathered in Cologne, Germany, for the annual Photokina expo, and Digital Camera was there to bring you all the major news from the biggest photography trade show on the planet. There was some major news, like the first glimpse of Panasonic’s first fullframe mirrorless cameras, a highly desirable new medium-format from Fujifilm (actually, make that two), and a new alliance between three of the industry’s big names… Homing in on the range’ One of the standout cameras of Photokina, Fujifilm’s new GFX 50R is a rangefinder-style version of its impressive GFX 50S medium-format camera Technically, the existing GFX 50S and the new GFX 50R are very similar. The new camera uses the same 50-megapixel sensor and promises the same level of image quality, and it…

Being at the heart of the action is a common enough impulse for a photographer. But in Shawn Heinrichs’ case, that ‘action’ can mean anything from dancing with manta rays or swimming with sharks to making friends with humpback whales, as he travels the world’s most colourful and life-filled oceans with his camera. He calls himself “an experiential photographer” and works by creating relationships with creatures under the water, rather than photographing them from a distance, to produce more original and creative images. Shawn is an underwater photographer and Emmy award-winning cinematographer with a mission: to help protect our oceans and their inhabitants. He has campaigned on urgent issues, such as the shark fin industry, and helped to establish protected reserves and environmentally friendly practices in underwater regions from Mexico…

Shawn Heinrichs Underwater photographer This award-winning diver, cinematographer and marine campaigner immerses us in his deep-sea world on page 148. Prepare to be amazed. Benedict Brain Creative photographer After a recent spell of globetrotting, this issue Ben returns to his ‘studio’ (box room) for a meditative stone shoot. Turn to page 50 to see the final result. Janek Sedlar Nature photographer Janek is a lover of his local forests, and hikes for days to capture amazing woodland scenes. We join him in the Czech Republic for a special sunrise shoot on page 8. Dave Smith Outdoor photographer Dave’s desires for exploring nature have inspired him to travel worldwide in pursuit of the next awe-inspiring scene. See his adventurer’s kit bag on page 28. Andrew James Our man with all the…

Memory cards Raw files are typically two or three times the size of a ‘Fine Quality’ JPEG, so you may need to invest in some highercapacity memory cards – 16GB will probably be a practical minimum. Raw software If you’ve got a new camera, you may need to upgrade to the latest version of your software to open its raw files: manufacturers don’t add new camera support to old versions indefinitely. Long-term storage You’ll need somewhere to store those big raw files long-term. 1TB internal hard drives won’t be big enough, and SSDs are smaller still, but plug-in external drives offer affordable extra capacity.…

1 Dynamic range Typically you can expect to recover up to 1EV extra highlight detail from a raw file, but up to 3-4EV from underexposed areas. Keep this in mind when you shoot high-contrast scenes and expose for the highlights. 2 Your histogram will lie! The histogram on the back of the camera is not displaying your raw file, but a JPEG preview that’s been generated by the camera on the fly. It only shows you what a JPEG would look like, not the raw data itself, which will tend to look flatter until you process it. 3 Expose to the right This means increasing the exposure to push the histogram as far to the right as you dare without clipping the highlights. The quality is said to be better in theory,…

Marcus Hawkins Photographer and writer Marcus is a former editor of Digital Camera New series: the complete guide to modern photography The light meter inside your camera measures the intensity of light coming through the lens, and works out how much is needed to produce a well-exposed photo – all in a split-second when you tap the shutter release button. That’s the theory, at least. In reality there is some room for error when it comes to exposure. The reason for this is that camera meters are calibrated around the amount of light reflected by a mid-tone subject – in other words, one that reflects 18% of the light that illuminates it. Taking pictures of rolling green fields or a grey cityscape? Then the meter can be relied upon to…

Pattern This meters the whole scene, but places greater emphasis on what the camera is focused on. The camera takes lots of readings across the image, compares them and then effectively applies its own exposure compensation. Pro: Good for off-centre subjects Con: Can be unpredictable Centre-Weighted Like pattern, this takes a meter reading across the whole picture, but it places greater emphasis on subjects in the middle of the frame. It is also not an ‘intelligent’ metering mode, so it won’t compensate for bright areas in the frame. Pro: Fairly predictable results Con: Not good for small subjects Spot Spot metering offers pinpoint precision when it comes to metering. Some cameras have the spot meter fixed at the centre AF point, while others allow you to use off-centre AF points.…

Category 3 Portraits Winner pbarton_ Category 4 Street Seen Winner Suvajit Mukherjee Enter the Wild Landscape category today at www.photocrowd.com/dcpoty FREE TO ENTER! Enter our competition now and win brilliant prizes! Young people (25 and under) haven’t been left out of the Digital Camera Photographer of the Year competition! In fact, they have their own division within each category, with a fresh set of prizes to be won, as well as a chance to be crowned the overall Digital Camera Young Photographer of the Year 2019. The same panel of professional photographers will judge your entries, with the same themed categories as the main competition. You can enter up to five shots – see right. (You can also enter the main competition as well as this one!) Professional photo-editing software…

James Paterson With a decade as a writer and photographer behind him, James knows exactly which Photoshop and Lightroom tools and techniques matter most. There’s no getting around it: the Pen tool is one of the trickiest to master in Photoshop. But there’s a reason why those who do learn to love it. It’s a powerful tool, whether you want to create smooth shapes or isolate and cut out parts of your photos. All it takes is a little practice and a few keyboard shortcuts. The Pen tool lets you create either paths or shapes. These are vectors, so they’re defined by mathematics rather than pixels. As such, they are eminently scalable with no loss in quality. Vector shapes are hugely useful for designers, but what about photographers? For those…

Connection is the key element to guarantee a successful portrait, and this photo has that in buckets. Everything is big: big eyes, big smile, even big hair! This photo has so much going for it that I’d almost be afraid to make major changes – but of course, that’s what we’re here for. The most immediate issue is the white balance. It looks like a flash with the white balance set to Tungsten. A quick look at the Temperature setting reveals this to be true: 3,200K rather than 5,000K for Daylight or Flash. The angle of the portrait has a slight foreshortening on the face, so the forehead looks slightly larger. I’m going to crop to 4x5 to help with this focus, and also because this is the kind of…

Irix Dragonfly 150mm f/2.8 Macro The third prime lens from innovative lens manufacturer Irix is a manual-focus macro. It features three super-low ED glass elements and a detachable tripod collar. www.irixlens.com; £/$TBC Manfrotto Befree GT Carbon Alpha Manfrotto’s special edition of its travel tripod has been developed for Sony Alpha cameras, and comes with a camera plate to match the A7 and A9 cameras. www.manfrotto.co.uk; £400 Leica CL silver Leica has added a second design option to its APS-C CL system. The new silver version, complete with black leather trim, joins the existing black CL. The specifications for both cameras are identical. http://uk.leica-camera.com; £2,250 Tenba Axis backpacks Billed as ‘super robust’ and available in three sizes (20L, 24L and 32L), the Tenba Axis bags offer a water-repellant exterior, YKK zippers…

Canon EOS 5D IV £3,249/$3,099 The EOS R’s closest Canon stablemate is the 5D Mark IV. Its DSLR counterpart boasts an additional memory card slot, but otherwise its features are broadly similar, making the EOS R a great replacement. Reviewed: Issue 183 Nikon Z7 £3,399/$3,397 Nikon’s new mirrorless scored straight fives in our review last month, and outperforms the EOS R in every category – particularly the all-important IBIS and 4K. Of course, it also costs £1,000 more. Reviewed: Issue 208 Sony Alpha 7R III £2,899/$2,998 Sony’s reigning mirrorless monarch only costs £500 more than the EOS R, but delivers five-axis IBIS and uncropped 4K video. Its time in the market means there’s a solid choice of lenses. Reviewed: Issue 199…

You’ve probably noticed that the overall ratings for many of the tripods in this test are exactly the same. Almost all of the models in the group are excellent, although some score a little higher for features, or build and handling, while others might have better performance or be particularly good value for money. Taking everything into account, however, the Benro Go Plus Travel is our favourite. It’s small and light for carrying around, yet stretches to a generous operating height, and delivers excellent versatility with its 180-degree pivoting centre column and detachable monopod. It’s also beautifully engineered and has fabulous handling characteristics. The Vanguard Alta Pro 2+ is another very good option, especially if you prefer speedy setup to compactness. For rock-solid dependability and rigidity, the Benro Mach3, Manfrotto…

Shooting close-up images shouldn’t be complicated in theory. The problem is that regular lenses have a minimum focus distance, so you can’t get close enough to tiny objects for them to fill the frame. There are some workarounds, such as screw-on close-up filters and extension rings. The best solution in the long run, though, is a dedicated macro lens. The word ‘macro’ has a strict definition: a lens that can reproduce a subject at its actual size on the camera sensor – so if you photograph an insect that’s 10mm long, its image will be 10mm long on your sensor. Here are eight elements to look for when you choose a macro lens… 1 Focal length All commonly available macro lenses are fixed-focal-length ‘prime’ lenses – usually with slightly longer…

1 DJI Phantom 4 Pro+ drone With a five-hour battery and range of 7km, this quadcopter gives Janek the option to view potential locations before he heads there with his camera. 2 Olympus E-M1 Mark II Janek used to shoot with a Nikon D90 and a Nikon D600, but he’s recently swapped both DSLRs for the lighter, more compact Olympus mirrorless system. 3 Olympus M.Zuiko Pro lenses Janek has an array of Olympus Pro lenses, including the 12.100mm f/4, the 40-150mm and the 40-150mm f/2.8. For this shoot, he mainly relied on the super.wide.angle 7-14mm f/2.8. 4 Lee filters Janek uses the Lee Big Stopper to extend exposure times when the natural light is too bright, and graduated neutral-density filters to balance high-contrast scenes. 5 Gitzo TGT2531 tripod This Mountaineer…

1 White balance adjustments When you shoot a JPEG, you have to get your white balance setting right in-camera because it will discard any remaining ‘unnecessary’ colour data. With a raw file, you keep all the colour information. 2 Noise control Camera makers are good at striking an optimum balance between noise and detail at high ISOs with their in-camera JPEG processing – but it’s still possible to get better results if you make manual adjustments in raw processing software. 3 Choice of developer Not all raw processing programs are the same! Each tends to give your raw images and particular ‘look’ and comes with different processing options. DxO PhotoLab, for example, excels at lens corrections and noise control. 4 Lens correction Some cameras offer built-in lens corrections for the camera maker’s own lenses…

Working directly on your raw files means you’re working on image data that comes straight from the camera and hasn’t been processed already. At one time, the adjustments you could make were limited to brightness, colour and contrast. In some programs that’s still the case: the version of Adobe Camera Raw that comes with Photoshop Elements, for example, is very basic. But the best raw processing tools are now so powerful that you might not need a regular image-editing program like Photoshop at all. Our main annotation shows some of the enhancements you can apply in the latest version of Camera Raw, which comes with Photoshop CC. You get the same tools in Lightroom. RAW EDITS IN DETAIL 1 Shadows and highlights With JPEGs you can easily run out of…

Here are some of our favourite external editors and plug-ins for raw image enhancements you can’t carry out in Lightroom alone. These can all be called up directly from within Lightroom, and some work with other raw processing tools too. Photoshop CC From £9.98/$9.99 per month It’s the default choice in Camera Raw, but you can use Photoshop CC as an external image-editor within Lightroom too. Affinity Photo 1.6 £48.99/$49.99 If you’re using an older standalone version of Lightroom, or if you simply prefer it to Photoshop, Affinity Photo makes a great alternative external editor. DxO Nik Collection $69 Now owned by DxO, the Nik Collection is no longer free but still offers great value, including some of the photo-editing world’s best plug-ins. On1 Photo Effects 2018 $59.99 Part of…

Midtone scene Many scenes average out to a midtone value. Here, the subject reflects around 18% of the light that falls on them, which means that the camera should produce an exposure that matches the scene. Bright scene In this example, the bright scene will reflect lots of light into the lens. To compensate for this, the camera will reduce the exposure to bring the scene closer to midtone: in other words, grey snow! Dark scene A dark subject or scene will absorb more light, and reflect less back towards the camera. To compensate, the camera will add more light to the exposure, leading to a washed-out result.…

Category 3 Portraits Winner wunderbilder Category 4 Street Seen Winner Andrew Robertson Enter the Wild Landscape category today at www.photocrowd.com/dcpoty FREE TO ENTER! Enter our competition now and win brilliant prizes! Now is your chance to bag some amazing prizes and test your photographic skills to the limit. Digital Camera Photographer of the Year is a major competition to discover exciting and talented photographers. With some great prizes to be won (courtesy of mpb.com, Rohan, Sony, Rotolight and Cewe), pro judges will choose winners across themed categories, as well as the overall winner. We want as many readers as possible to enter, so we’re revealing all of the categories now. You can enter as many categories as you like! Easy photography kit trading MPB.com is changing the way that photographers…

Jon Adams Jon is a professional photographer and writer. He also provides one-to-one and smallgroup tuition in both digital SLR and Photoshop image-editing skills. Make a panel of three images that work together, and you’ve got a triptych. The best ones are connected by a common thread, though this can be as overt or as subtle as you like. You may want to use the same subject captured from three different angles, or show three different views of a particular place. You can even use a single image and break it into three parts so the continuity is evident between the frames. There’s such a wide range of possibilities for triptychs, that the only real limit is your imagination. But to get the creative process underway, you need to start…

James Abbott James is a professional photographer who specialises in landscape and portraits. He’s an advanced Photoshop user and has created hundreds of tutorials. Digital photography is amazing for so many reasons – not least for the amount of control we now have over our images at home to make them look their best. There’s a problem with digital imagery, however: it’s so good that without a few tweaks here and there, images can look too perfect – too clinical. Analogue photography, on the other hand, was much more a thing of chance. Of course, film emulsions were extremely stable, and still are if you can find them; so when you chose a film for its colour properties, you could be confident that these would be present in your images.…

For this challenge, I’ve taken the ‘free reign’ part of the brief to the extreme. It’s certainly not an everyday portrait edit, but it demonstrates the breadth of possibilities open to you in Photoshop. In the original photo, the subject’s highlighted hair, huge lashes and bold eyes seem larger than life – almost like a caricature. There’s a playfulness to the expression and a light-hearted feel to the portrait that I wanted to emphasise with an over-the-top, anime-style treatment. After processing the image in Camera Raw to enhance the tones, I used the Liquify filter to reshape the face and enlarge the eyes, before finishing off by recolouring the backdrop and hair. WHAT I WANT TO CHANGE: 1. Smooth the details 2. Re-shape the face 3. Change the tones and…

Quintin Lake Roving photographer Quintin is past halfway in his 6,000-mile photo walk around the whole of the UK coast www.theperimeter.uk This month’s route Inveraray to Campbeltown 6 days, 96 miles Total so far: 3,611 miles It’s my first day back on the trail for a while. I note down the sensations that make me happy to be back: feeling the wind on your face; not knowing what lies ahead; the sound of birdsong; carrying everything you need; the scent of the ocean. The route heads south down the Kintyre peninsula; when I told my wife about the Crinan Canal, which cuts right across the peninsula, she suggested I follow it as a shortcut. I’m not sure she fully appreciates the inherent futility of my journey. I enjoy picking my…

The photography headlines this month continue to be dominated by the shake-up in your choice of full-frame mirrorless cameras. Last issue we gave Nikon’s Z7 an enthusiastic thumbs-up in our test; this month it’s the turn of Canon, with the EOS R and a couple of tantalising new lenses to go with it. Read our definitive verdict over the page. There are more mirrorless buying options on page 125, as we pit the flagship compact system cameras from Olympus and Panasonic against one another. There are a lot of similarities between the two on paper, yet the OM-D E-M1 Mark II and the Lumix G9 offer quite distinct shooting experiences, as you’ll discover. Our Group Test focus this issue turns to tripods, as we assess eight models made from carbon-fibre,…

Apple MacBook Pro 15in £3,329 / $3,499 www.apple.com Processor: Six-core 2.9GHz Intel Core i9 RAM: 32GB • Storage: 512GB SSD Screen: 15in IPS LCD, 2,880 x 1,800 Our MacBook Pro test machine came with a range-topping Intel Core i9 8950HK processor and 32GB of RAM, so it’s no surprise that it aced our benchmark tests and felt lightning-fast in Photoshop. Along the top of the keyboard you’ll find Apple’s Touch Bar. This row of virtual buttons dynamically changes according to your current app, and Photoshop makes great use of it. The display’s 2,880 x 1,800 resolution may be less than 4K, but it’s easily crisp enough; the display also automatically tweaks the colour to compensate for ambient lighting. We disabled this feature for consistency and recorded an outstanding Delta-E figure…

Nikon 40mm f/2.8 G AF-S DX Micro £269/$277 This Nikon 40mm f/2.8 macro lens is typical of compact, low-cost, APS-C format macro lenses. The short focal length means shooting very close to your subject, and it’s not very refined. Sigma 105mm f/2.8 Macro EX DG OS HSM £359/$569 This macro lens offers terrific image quality and value for money for more discerning close-up shooters. It’s quite big and heavy, but its 105mm focal length gives you a better shooting distance. Tamron SP 90mm f/2.8 Di VC USD Macro £649/$649 This is the latest version of a legendary macro lens from Tamron; although it’s more expensive you get superb image quality, design and construction, and it has image stabilisation built in.…

1 You have four different kinds of tripod: which of them is most likely to be the sturdiest? A The shortest one B The tallest one C The lightest one D The heaviest one 2 Which of these is not a Blending mode in Photoshop? A Soft Light B Hard Light C Pin Light D Spot Light 3 In order to compare the maximum power of two flashguns, what would you need to know about each flash? A The Guide Number (in metres or feet) B The zoom head setting of the flashgun used to measure the Guide Number C The ISO used to measure the Guide Number D All of the above 4 Which of these is the inverse square law used for? A To explain why the usual…