Why does nikon....

Started May 28, 2013 | Discussions thread
JSees Regular Member • Posts: 211
Re: not false

davidib17 wrote:

Mako2011 wrote:

For example. Every DX lens can be used exactly for the focal length it is labeled on DX and many FX cameras. The manual that goes with the lens explains the output results.

A DX 35mm lens can not, and will not ever be able to take a picture at the same zoom length as a FX lens on a full frame camera set at 35mm, no?

Sure it can. The lens has a focal length of 35mm even if you're just shining a light through it onto a piece of paper. It's the same "zoom length" regardless of what is captured, or even if nothing is captured.

The DX sensor captures less of the projected image than the FX sensor, effectively cropping it.

When you take picture and then crop it in Photoshop, effectively making it look sort of like you used a longer focal length, did you change the actual focal length of the lens? If you did, you've got some amazing talents!

You can put that 35mm lens in front of a DX sensor, an FX sensor, a medium format sensor, or an 8.5 x 11 inch sheet of paper. The image projected is always the same, and at the same distance between lens and sensor or paper. What gets captured depends on what's behind it. And yes, with the right adaptors, you can mount some lenses intended for smaller formats on medium format cameras. Doesn't change the actual focal length.

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