Just addon the end of url.
Hope this help.
Your tammy is with vc or no vc?
Thanks...mine is non VC..wat do u tink of the picture?it seem soft to me at F2.8.
tamron 17-50
- Thread starter felix1988
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Thanks...mine is non VC..wat do u tink of the picture?it seem soft to me at F2.8.
hi guys,i just got my 17-50(non VC)..i realise that my picture doesnt look sharp at F2.8 as compare to photo in F5.6. Is it normal??or the lens is not well calibrated??anyone can help to clear my doubts??thanks
all lenses will be sharper when stepped down, compared to when wide open.
So f5.6 being sharper than f2.8 is normal.
vocalmind
New Member
How acceptable is that normal is subjective.
http://photo.net/learn/focustest/
Maybe you can try to test using the method in the link.
Okie..will try,but wat do u tink of the two pictures??does the 1st picture look soft to u??
vocalmind
New Member
Yes, the first one is soft.
samchong
Senior Member
I don't think so your lens have problem , F5.6 have to be sharper than F2.8 due to the DOF
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sensornoise
New Member
The tamron 17-50 is sharp wide open in center. At least mine is. Stopping down makes no big difference in center. Check for front/back focusing issues.
Cartman2000
Senior Member
I don't think so your lens have problem , F5.6 have to be sharper than F2.8 due to the DOF
DOF is not = sharpness actually
vocalmind
New Member
Agree...
seem like i need to go down to the service center and let them cal for mine..
There are lens that has a good front/back focus (good DOF) but not sharp below f2.8. If I were you, i would go down to the service center as well.
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my tammy oso soft at 2.8 when i 4 and above, it is more sharp.
i would say ur 2.8 looks great! i dun see back or front focus if i assume u are focusing on the bottle itself.
i agree. the test focus seems great. it a minmum front focus but the object in the center is still focus. u must consider the dof of F2.8
kodakero12
Member
quick question with your new tamron vc...have you encountered while taking pics..AF stopped working and camera wont even take pictures...but after you turned it off & on, the problem disappears and its back to normal again?
mine is not vc version..but i nv encounter your issue before.cheers
I saw your pics. The pic @2.8 looks soft but actually it is not that soft. It is because the the DoF is a lot thinner and the edges of the bottle is actually a little OOF. Look at the wordings in dead center of the bottle, it is actually ok. Look at the last line of text on the label, the words "US" is fine.
flyzaway
New Member
My friend have the same problem several times when he mounted his new tammy to his 20D, but after you turn it off n on again, it dissapears
but when i mounted it to my 500D it's working just fine
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