|
Usual stuff, condition mainly. Look for/ask about marks on the lens/optics including scratches, blemishes in coating and fungus, as well as dust inside the lens. Minor dust isn't an issue but can reduce value, large amounts of dust can start to affect image quality. Cosmetic things like scratches and marks on the barrel tend to devalue lenses. Usually lenses without all the accessories (caps, hoods, case) as well as the box can lower price.
The best idea is to have a look at several places (MPB, WEX, Harrisons, London Camera Exchange and Camera Jungle) and get a feel for what the prices for 'like new', 'excellent', 'good' and 'well used' are? Sometimes you will find one that's lower than 'normal'. For example I just picked up an "as new" 85mm f1.8 that was £30 cheaper than other "as new" lenses. |
|