Ugly Hedgehog - Photography Forum
Home Active Topics Newest Pictures Search Login Register
Frequently Asked Questions and Answers
FAQ: What differences between an FX lens and a DX lens on an FX (Full Frame) sensor and a DX (APS-C) sensor?
This topic is locked to prevent further replies.
Jul 28, 2013 21:22:40   #
GoofyNewfie Loc: Kansas City
 
There have been repeated posts concerning 'cropped-sensor' (DX) lenses giving a different view than full-frame (FX) lenses, when used on a cropped-sensor (APS-C) camera.

The actual focal length of all lenses are measured the same way, whether it be P&S, bridge cameras, APS-C, Full Frame, medium format, or large format. Where they differ is the area captured by the sensor. Even though the magnification is the same, the image circle projected by a full-frame lens needs to be larger than that of the APS-C lens, in order to project all the way to the corners of the larger sensor. Bridge and P&S cameras commonly use a full-frame equivalent, but the actual focal length is listed in the printed specs.

If you use a cropped-sensor (APS-C) camera and put a cropped-sensor or full-frame lens of the same focal length on that camera, you get the exact same angle of view, and the exact same capture on the sensor.

I shoot Nikon, so for this example, I’m using the term FX for Full-Frame and DX for 'cropped-sensor' (APS-C). For the following test, I used a Nikon D200 (DX), Nikon D800 (FX), Sigma 50-150 DX zoom lens set to 50mm, Nikon 50mm 1.4 FX lens.

DX 50-mm lens on a DX camera
DX 50-mm lens on a DX camera...

FX 50-mm lens on a DX camera
FX 50-mm lens on a DX camera...

DX 50-mm lens on an FX camera in DX mode
DX 50-mm lens on an FX camera in DX mode...

DX 50-mm lens on an FX camera in Full Frame mode
DX 50-mm lens on an FX camera in Full Frame mode...

FX 50-mm lens on an FX camera in Full Frame mode
FX 50-mm lens on an FX camera in Full Frame mode...

Reply
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.
Frequently Asked Questions and Answers
UglyHedgehog.com - Forum
Copyright 2011-2022 Ugly Hedgehog, Inc.