Tamron 17-50mm f2.8 sharpness

[boyboy]

Hence, it should not be used on a full-frame body, although you can certainly try. It will work up to a certain focal length, I believe.

severe vignetting at ALL focal lengths. no need to try :bsmilie:

cos i tried liao on my F70. zoom in, zoom out still like that. can see vignetting on the viewfinder (95% viewfinder some more...)

but some crop frame lenses can indeed be used on full-frame camera :thumbsup:, just not this one.

actually, give that it's an F2.8 lens with such a zoom range and lightweight build, that it works as well as it is is very good liao. i dare not ask it to perform FX lens duties.

i do that for my tokina 11-16 though. works on film with one UV filter at 15.5-16mm. effectively a prime lens la.

 

[calebk]

Can this lens use on a full frame body?

Nope. The Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] (Model A16) is designed for the DX format, as are all Tamron lenses that are designated Di II.

Hence, it should not be used on a full-frame body, although you can certainly try. It will work up to a certain focal length, I believe.

I concur with what he said. It's pretty unusable, actually:

severe vignetting at ALL focal lengths. no need to try :bsmilie:

cos i tried liao on my F70. zoom in, zoom out still like that. can see vignetting on the viewfinder (95% viewfinder some more...)
...

 

[canik7]

I believe depends on which body. I remember from some thread that D700 or D3 shoudl be able to shoot with DX lens but at 5MP. I dont' think those will have vignetting.

 

[XenoPhoto]

ok, i manage to find time to take a picture
50mm at F/2.8

full size



100% crop

 

[boyboy]

I believe depends on which body. I remember from some thread that D700 or D3 shoudl be able to shoot with DX lens but at 5MP. I dont' think those will have vignetting.

correct. but like this, u can slap on any DX lens to a 35mm film camera, shoot, develop the film, scan (until this point, no diff between DX and FX lens)

for DX lens on film, just need to do a crop to get rid of the vignetting.

so when someone ask abt "whether this lens will vignette on full frame", this is what they mean, that u can shoot full frame w/o vignette. shooting in dx mode not counted :bsmilie:

cos there are DX lenses that u can shoot with on film and full frame with zero vignetting. no need to shoot "Dx at 5mp"

why then is it designated a DX (or crop frame) lens? cos it is not optimised for full frame. corner sharpness may suffer and very likely there is vignetting at some focal lengths..