From the course: Photo Gear Weekly
Cropped sensor and focal length, oh my
From the course: Photo Gear Weekly
Cropped sensor and focal length, oh my
- One of the issues that photographers have been talking about for a very long time relates to crop sensor cameras, or what was often referred to, especially in the early days of digital photography, as a focal length multiplier. The idea is, depending on which camera you're using, a given lens might behave as, for example, a 100 millimeter lens, or with a different camera, as a 160 millimeter lens. But am I really getting free focal length out of my lenses? Sort of, but not exactly. What's really happening is that there are different sensor sizes in different cameras. And of course, for many photographers, we got our start with 35 millimeter film photography. Many digital SLRs relate to that format, and so we have, for example, I have the 5D Mark IV, which is a full frame sensor camera. And that means that the frame size, the image sensor that's actually capturing the photo, is the same size of a single frame of 35 millimeter film. But, I have other cameras that have a smaller sensor. Here, the 7D Mark II for example, with what we refer to as essentially a cropping factor of 1.6x. It really means, that with that smaller sensor, we're seeing a smaller field of view. We're seeing a smaller view of the image circle that's being projected by the lens. That means that we're seeing a tighter area of the overall frame, and I have a sample set up here, actually, to help illustrate the concept. I've zoomed in and focused in onto a set of billiard balls here, and with my current set-up, with a full frame camera, I can see all of the rack of billiard balls there. I'll go ahead and capture an image of those billiard balls. I'll then turn off the camera, and then switch to my crop sensor camera. And once again, this hase that factor, that cropping factor if you will, of 1.6x. So a 100 millimeter lens will behave like a 160 millimeter lens, but again, what that really means is that I'm seeing less of the overall frame, so a smaller field of view. And so, with the exact same lens, with the exact same setup from the same distance, now when I take a look at my shot, I'm not seeing all of the billiard balls. I'm seeing, well, maybe about half of those. I'm getting a much tighter view. I'm still using the entirety of that image sensor, the full resolution of that camera, to capture the image. So in both cases, I can expect an image of excellent quality. I'm just seeing a different field of view. The idea, really, is that you need to get familiar with how your lens behaves with your specific camera, under given circumstances. Really, I think what's most helpful there is to just have a sense, an anticipation, of which lens you might need under given circumstances. So, when you approach a scene you can anticipate which lens to take out of the bag to get set up. But otherwise, just keep in mind that of course there's different behaviors among different sensor types. It's not free focal length, per se, it's just changing what field of view we're actually capturing.
Contents
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Using an underwater bag to protect your camera2m 11s
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Introduction to B&H Photo as a resource2m 1s
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Understanding the purpose for the various filters7m 24s
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The difference between prime and zoom lenses2m 29s
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Knowing where to go for rental photo gear2m 53s
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Macro shots using an extension tube1m 50s
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Travel tripod options for packing light4m 7s
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Back button autofocusing for faster framing3m 19s
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Using custom white balance in tricky lighting4m 8s
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Discovering an old photography process: Tintype7m 9s
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Understanding how to purchase used gear4m 18s
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Working with ND filters for longer exposures2m 28s
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Using a focus rail for macro photography4m 5s
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Understanding ways to clean a camera sensor5m 9s
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Lens cleaning options for best lens maintenance3m 49s
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Introduction to DSLR video options4m 7s
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Options for recording audio on your DSLR6m 34s
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Inexpensive long-range zoom lenses2m 38s
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Understanding tools for display calibration7m 40s
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Looking at the mirrorless camera options available15m 2s
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Overview of lighting options available for photo8m 4s
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Exploring drone technology and photography options5m 46s
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Using lens hoods: When and why2m 44s
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What is a loupe and when do you need one?1m 24s
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Using a Lensbaby2m 14s
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Fast filter switching with Xume adapters1m 15s
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Cropped sensor and focal length, oh my2m 57s
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A look at the Canon 5D Mark IV1m 18s
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Protecting filters with a filter nest1m 46s
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Using a color checker for accurate color2m 34s
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Camera bag options4m 45s
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Dual-slot cameras1m 51s
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Xenon flash for iPhone2m 46s
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Why GPS in camera is a great feature2m
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Conference Intro3m 39s
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Commuter bags3m 21s
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Lens upgrade4m 33s
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Lens flipper2m 59s
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Drive savers3m 30s
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Photo books5m 31s
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SanDisk cards8m 32s
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Moo photography business cards3m 52s
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LaCie drives4m 1s
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Remote cable release1m 29s
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Teleconverter1m 18s
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Organizing camera gear with racks2m 46s
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Using a personalized controller for faster editing5m 46s
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Understanding maximum aperture3m 24s
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Custom options for camera straps2m 51s
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Lens exchange bag for lens swapping in the field1m 24s
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Printing a Lens Hood1m 23s
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Why Use Manual Exposure?2m 37s
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Focusing with Live View1m 45s
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Move your focus points2m
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Diopter adjustment1m 59s
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GPS battery drain1m 33s
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Two cards in the camera2m 42s
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Easing into manual mode2m 32s
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The camera as a card reader1m 17s
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Understanding exposure compensation2m 19s
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Camera power adapter1m 21s
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Custom Camera Settings3m 39s
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Long Lens Compression Myth3m 11s
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Battery Pouch1m 31s
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Going Wide with a Cropped Sensor3m 8s
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Prynt Pocket Printer4m 49s
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Choosing Photo Papers4m 51s
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Polarizing filter magic1m 53s
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Instant prints with Instax2m 2s
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Tablet signature challenge2m 50s
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Macro lenses for more than macro1m 28s
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Color space in the camera2m 53s
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Smartphone accessory lenses2m 39s
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Card wallet tips2m 38s
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Do you have a hidden rain cover?1m
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How many aperture blades?3m 19s
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Autoexposure bracketing2m 41s
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Cotton carrier2m 11s
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Do you need image stabilization?3m 25s
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Zip your bag!1m 42s
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Using a reflector1m 11s
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Road trip power1m 42s
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Spider camera holster1m 20s
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WhiBal precision gray card2m 39s
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Hanging branch boxes1m 24s
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Air blower for cleaning1m 59s
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Cleaning your own sensor4m 52s
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Batteries in the cold1m 35s
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Waterproof cameras1m 47s
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Wi-Fi in the camera2m 35s
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Wireless Bluetooth remote1m 46s
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Bus-powered storage1m 56s
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Built-in digital level1m 34s
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Depth-of-field preview2m 14s
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Why is this lens so heavy?2m 26s
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Flash exposure compensation2m 10s
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Lens lock2m 7s
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Mirror lockup2m 21s
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Rugged storage1m 47s
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Camera star ratings1m 21s
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Custom menu on a camera2m 2s
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In-camera time lapse2m 2s
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Hair dryer for lens fogging2m 10s
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LensCoat lens covers1m 39s
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Flash basics3m 13s
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Recording a GPS track log1m 40s
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Gimbal stabilizer1m 32s
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Tripods with flexible legs1m 2s
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ExpoDisc for white balance2m 12s
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Automatic panoramas1m 11s
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Bean bag for flexible support58s
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KUVRD universal lens cap1m 12s
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Focus confirmation1m 50s
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Quickly switching autofocus modes2m 23s
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Shower cap as rain cover59s
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Battery charging on the go1m 1s
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Choosing full frame vs. cropped sensor2m 5s
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"Normal" focal length1m 59s
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Custom SLR glide strap1m 11s
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Light meter apps2m 22s
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Loupe for sensor dust1m 26s
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Focal length planning2m 36s
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Focal length and magnification2m 13s
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LensPen for sensor cleaning1m 38s
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360-degree camera3m 10s
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iPhone portrait mode4m 7s
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Why shoot with film?2m 59s
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Dust removal in the camera3m 41s
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The mysterious locking switch2m 1s
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Voice memos for photos2m 5s
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Choosing media card capacity2m 48s
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Photo review on the go3m 5s
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Planning a moon shot4m 50s
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White balance and raw capture2m 36s
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The challenge of wide-angle composition4m 20s
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Clean that front element2m 2s
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All about starbursts4m 47s
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Long exposure noise reduction3m 39s
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Which filters should you carry?2m 17s
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SSD versus traditional hard drive2m 3s
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End of day camera reset1m 59s
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Firmware updates2m 5s
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How many autofocus points?2m 23s
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Why I avoid shutter priority mode2m 28s
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Histogram options2m 5s
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Power off for lens changing1m 28s
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The best reason for prime lenses1m 46s
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Don't forget to rotate1m 19s
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Exposure blinkies1m 36s
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What makes a lens digital?2m 43s
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The right way to rotate a polarizing filter1m 20s
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Autofocus range limiter1m 44s
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Photo sharing with AirDrop2m 17s
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Track log on a DSLR1m 31s
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Built-in "cable" release1m 21s
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Chimping: Good or bad?1m 11s
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The shutter speed fallacy1m 48s
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Vary your tripod height58s
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Panning with precision1m 39s
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Media card adapter1m 25s
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The blindfold test1m 30s
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Film scanning services1m 29s
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Photo lamps1m
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Lens adapter for mirrorless1m 18s
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Focus peaking1m 43s
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Memory read versus write speeds1m 43s
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Sling bags1m 21s
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Mirrorless battery dilemma1m 42s
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Metal prints1m 8s
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Adjusting to an electronic viewfinder1m 44s
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Powered USB hub1m 22s
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Tripod straps1m 11s
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Silent shooting1m 22s
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Noninterchangeable mirrorless1m 39s
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Gimbal cameras1m 45s
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Display resolution myth2m 9s
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Caution switching from video1m 30s
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Scanning slides1m 51s
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Battery precautions1m 23s
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Ready or not?1m 29s
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Exposure compensation or manual?1m 53s
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All-in-one roller bag1m 45s
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Calculating depth of field3m 14s
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Batch scanning film1m 26s
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Smartphone as bubble level1m 9s
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Lightroom as smartphone camera1m 54s
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Depth of field transition1m 57s
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Bag for cables and accessories1m 8s
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Understanding lens compression3m 12s
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All-in-one lens compromise2m 25s
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Traveling with hard drives1m 37s
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When to use spot metering2m 35s
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Understanding parallax1m 57s
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Studio lighting starter kit1m 32s
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Keep photos on memory cards?1m 23s
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Manufacturer repair centers1m 16s
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Photoshop for the iPad1m 39s
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Tripod leg lock options1m 45s
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ProCamera app2m 17s
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Top shortcoming of smartphone photography1m 44s
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Choosing a continuous shooting speed1m 21s
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Continuous or one-shot autofocus?1m 57s
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Is raw capture on a smartphone better?1m 53s
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Smartphone cable release1m 22s
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The real reason for a UV filter1m 32s
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Extending camera battery life1m 37s
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Time-lapse with a smartphone1m 41s
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When will the sun be high enough?1m 51s
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Smartphone exposure adjustment1m 24s
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Manual focus disabled54s
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Motion blur with an iPhone1m 8s
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