Try as I may I can't get my head round this DX v full frame malarkey. I understand that one sensor is bigger than the other but can anyone expain or preferably show diagrams (maybe a link) of how different lenses interact with these different formats? I just can't get this tiny little mind of mine round the specifics.:bang::bonk:
DX and FX explain please
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An FX (full frame) lens can be used on both a full frame camera such as a Nikon D3 and a DX camera with a crop sensor such as Nikon D300s but the focal length will be different.
A 50mm lens on the D3 will give you the same angle of view as it would have on a 35mm film camera, but put it on the D300s with a 1.5x crop and it effectively becomes 75mm (50 x 1.5)
DX lenses were designed for the smaller sensor. If you put a DX lens on the D3 it only uses the middle part of the sensor, giving you a smaller file and defeats the object of having full-frame.
If using a D300s or similar crop sensor camera you need to multiply the focal length of the lens by 1.5 (1.6 on some Canon's I believe) to calculate what the effective focal length is.
There are other subtle differences too, but that is the fundementals!
A 50mm lens on the D3 will give you the same angle of view as it would have on a 35mm film camera, but put it on the D300s with a 1.5x crop and it effectively becomes 75mm (50 x 1.5)
DX lenses were designed for the smaller sensor. If you put a DX lens on the D3 it only uses the middle part of the sensor, giving you a smaller file and defeats the object of having full-frame.
If using a D300s or similar crop sensor camera you need to multiply the focal length of the lens by 1.5 (1.6 on some Canon's I believe) to calculate what the effective focal length is.
There are other subtle differences too, but that is the fundementals!
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Try this, same focal length lens on both DX and FX...
Try Nikon's lens simulator page (wait for it to load) http://imaging.nikon.com/products/imaging/lineup/lens/simulator/