Where/how do you verify if a lens has deteriorated?


timothee

New Member
Sep 8, 2008
12
0
0
Singapore, Boon Keng
#1
Hi all,

Some months ago, I accidentally dropped my Nikon 10.5mm full-frame fisheye lens. It still works OK, focuses, no scratch, etc. But I have this nagging feeling that images are slightly more blurred than they used to be.

What is the best way to check if my lens is "faulty"? Would the Nikon service center have the equipment to test that it is still within acceptable quality range (or not)? If not, is there anywhere else I could go that could do that?

Thanks in advance!
Tim
 

ricohflex

Senior Member
Feb 24, 2005
3,353
8
0
sing
#2
Send to service centre. Maybe out of alignment. They should have equipment to test this. If not, better close shop.
 

sjackal

Senior Member
Jul 9, 2008
4,490
10
38
#3
Depends on many factors, some questions.

1) Drop from what height?
2) On to what surface?
3) Any focusing ring stiffness?
4) When doing manual focusing, do you feel any resistance or grinding?
5 Tested on tripod at safe shutter speed?
 

Apr 18, 2009
796
0
0
Singapore
#4
Hi all,

Some months ago, I accidentally dropped my Nikon 10.5mm full-frame fisheye lens. It still works OK, focuses, no scratch, etc. But I have this nagging feeling that images are slightly more blurred than they used to be.

What is the best way to check if my lens is "faulty"? Would the Nikon service center have the equipment to test that it is still within acceptable quality range (or not)? If not, is there anywhere else I could go that could do that?

Thanks in advance!
Tim
use the same settings and techniques of a previous photo and compare.