Silvialite
Arch-Supremacy Member
- Joined
- Dec 5, 2010
- Messages
- 14,450
- Reaction score
- 30
Ask chiu all... How do u know whether there is problem with the 2nd hand lens or not?
Last time I remember my seniors told me must check for light leakage, smooth focus turning, etc...
Depends on what's your standard. Shoot at all apertures and focal lengths to ensure all working. Check sharpness of output. And of course, check cosmetics and any loose parts inside. You may want to pixel peep if you are getting a costly lens.