testing used lenses for sale

[nick_jones]

Hi, everyone:

 

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In view of the high prices of new LF lenses, it is always tempting to try the used market, despite uncertainties about the past history of a given lens (e.g.was it ever dropped?) and the absence of the warranty that would normally come with new product. The particular lenses I have in mind are pre-owned models of lenses in current production by Schneider, Rodenstock, Nikon, Fuji. My problem is knowing a good (or not so good) used lens when I see one. Two questions:

 

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1)At the place of purchase, say a camera store showroom, what are some visual tests that can be performed? Let's assume that I have my LF camera, appropriate lens board, etc. with me.

 

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2) After purchase, on the assumption of a trial period of a few days, what are some diagnostic shooting tests that might quickly reveal problems not apparent at the time of purchase?

 

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Any responses will be gratefully appreciated. All the best, Nick.

[pat_krentz]

1.No cracks, no fogging or fungus, do the speeds sound about right,

does the shutter stick, try it at all speeds and apetures at least 3

times each. 2. Find a naked tree and focusing at infinity take

several shots, after development, check the neg under a loupe, are

limbs sharp? If not return it. Pat

[neil_poulsen1]

All my lenses are used, and I've never had a problem. I always select

quality brands (e.g. Schneider Symmar-S and Super Angulons) that have

been well cared for. The one thing that I overlook are the few silver

specs that can accumulate on the barrel in Schneider lenses. Like the

previous post, I avoid lenses with dings, scratches, part of the

coating rubbed off, etc.

[paul_owen]

Nick. One thing I've learned is not to be too fussy about lenses!!!

 

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I was one of these people who verged on paranoia when checking both

new and used lenses!! I agree about checking for signs that the lens

has been dropped etc, but small marks (often from over zealous

cleaning) and those small flecks/specks that cling to internal

surfaces of the elements make NO DIFFERENCE whatsoever to the final

image. BUT they do offer a bargaining point with dealers/sellers!

 

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One good way of examining a lens is to open the shutter and hold the

lens to the light and have a good look. If you find any of those

pesky flecks, pull a face and sigh! and then offer a lower price!!

 

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Regards Paul.

[dan_smith]

Go to the store with your camera & an extra lens board to fit the

lens you are looking at. Shoot a few images with it in the parking

lot. Most stores will let you do this as it assures both of you that

you are buying a lens you want and know will work.