Since the 40D was further back, as opposed to the 5D, the DoF was larger. That is the direct result of having to INCREASE the focusing distance when shooting with the 40D to achieve the same composition. If you look closely at the above 2 images, you’ll notice that the image shot with the 5D, a FF camera, has a narrower DoF than that which was shot with the 40D, a cropped sensor camera. I don’t feel that I correctly addressed the issue of Depth of Field when I first wrote this article. I was using a tripod, so the orientation was different for the full-frame shot as I couldn’t get the 5D close enough without changing the angle. In the 2 images that follow, I shot the lava lamp with both a full-frame camera and a 1.6 cropped-sensor camera using the same 50mm full-frame lens at the same distance:Ĭanon 50mm macro at f/2.5 from 4 inches awayīoth shots were taken with the same lens, and I tried to get the subject to fill the frame equally for both cameras as best I could by moving in closer for the full-frame shot. Confused? Simply put, think of a 1.6 sensor as having less angle-of-view, and don’t worry about it any more.Ī cropped sensor means that the sensor is not picking up as much image “real estate” as a FF sensor if you use a FF lens. I’ll refer to these as 1.6 size sensors, because 1.6, to put it in a confusing and misleading way, is the factor by which your focal length changes on a 1.6 sensor. Most lower-end (non-pro) DSLRs come with a smaller sensor. Equipment doesn’t take photographs, people do! However, if you MUST know the why, the how, and the WTF, read on. Personally, I like shooting with primes, and if I need to change the damn focal length I just MOVE! There’s way too much emphasis placed on technical specs, and if you know how to compose and get proper exposure, and you understand the technical limitations of your equipment, you’ll take great shots. It’s really not worth the time obsessing over stupid stuff like the perfect focal length. So throw that FF lens on your Canon or Nikon cropped-frame camera and go shoot. It’s tough to make generalizations about lenses, but I don’t see a down-side the using a FF lens on any camera as long as you understand what the REAL angle-of-view (notice I didn’t say “focal-length”) will be in a cropped frame. Right off the bat, You ABSOLUTELY CAN put a FF lens on a cropped sensor camera!! In fact, there are several reasons why this can be a BETTER choice. Honestly, there is a ton of confusion and bad information about this subject floating around. Only the higher-end cameras have a full-frame sensor, and virtually no one who asks me about a lens has a FF camera. They are both full-frame lenses, which simply means the image circle they produce will accommodate a 35mm film frame size, which full-frame DSLR sensors are. In the end, I always recommend either the Canon 50mm prime f/1.8 or the Nikon 50mm f/1.8. The fact is, you have to decide what kind of shooting you intend to do, and then figure out which lens can help you, and of course, how much it will cost. I often get asked which lens I recommend……as if there exists a lens that can do it all, for everyone, in all shooting conditions. Full-Frame vs Cropped Frame – What’s the Deal?
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