using dx lens on fx camera

iwols

iwols

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Hi all just wondered what thé négatives are when using a dx lens on say fx body such as thé d750 cheers
 
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Ploddles said:
None, but you can't do it the other way around.
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?? You can on Nikons

As to the OP, the main issue is you lose a load of pixels, as in the DX lens is focusing on the centre part of the sensor, you loise the edge. I am sure one of the techies can explain it better though
 
Yv said:
?? You can on Nikons

As to the OP, the main issue is you lose a load of pixels, as in the DX lens is focusing on the centre part of the sensor, you loise the edge. I am sure one of the techies can explain it better though
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Sorry, I assumed it was the same as on Canon. However on Canon you don't lose anything at the edges.
 
Nikon FX bodies sense when a DX lens is fitted and crop the sensor to suit, Canon EFs lenses wont fit EF bodies, You can only use EF lenses on Canon FF Bodies so the same senario dosnt apply.
 
dizidav said:
Nikon FX bodies sense when a DX lens is fitted and crop the sensor to suit, Canon EFs lenses wont fit EF bodies, You can only use EF lenses on Canon FF Bodies so the same senario dosnt apply.
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No, you can use EF lenses on crop and FF bodies. When used on crop bodies you don't lose or gain anything, pixel wise. You can only use EFS lenses on crop bodies & not FF.
 
You can turn off the automatic cropping for when a DX lens is attached to an FX camera. Some DX zooms will work on FX without cropping or vignetting for part of their range - eg 18-55 will work from approx 24 to 55.
 
Ploddles said:
No, you can use EF lenses on crop and FF bodies. When used on crop bodies you don't lose or gain anything, pixel wise. You can only use EFS lenses on crop bodies & not FF.
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If you don't lose anything then by definition it's not technically a 'crop' lens, its just a different 'mount', if that makes sense. However, I know sod all about canon lenses other than you cant put some onto some bodies. My assumption is the OP is a Nikon user given his Dx/Fx reference and mention of a D750.

However just to throw a spanner into the works of convention, I have a 30mm Sigma which is technically a 'DX' but works on FF with no loss [as long as you turn the auto sensor off], although you can't use the short hood and and there is some softness and vignetting on edges/corners. I believe this is also the case with a few other lenses too to one degree or another.
 
sometimes if you google you can find out what coverage a certain lens has
so a crop sensor lens would normaly have a smaller image circle
 
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