testing a S/H lens

graycbr

graycbr

Suspended / Banned
Messages
832
Name
graham
Edit My Images
No
hi guys
just got a S/H lens & its got a few small marks/spots on the lens ,looks like the coating . And a dust spot on the rear lens ...
What settings should use to fully test this lens for IQ etc ?
Any input would be helpful as got 7 days to return it ...
 
Last edited:
A few small specks/spots are unlikely to have too much impact on IQ but might make it more prone to flare when light from a direct source hits the front element and might reduce contrast a little. Whether the marks on your lens make a significant difference or not will be hard to judge without a direct comparison with a brand new perfect example so really you need to take a load of test shots of the type you usually take and see if you think the images are suffering because of the marks. Maybe take a few at the same focal length that a lens you already have covers and compare the shots through both lenses.
 
If the pictures look good the lens is ok simple.
 
graycbr said:
What settings should use to fully test this lens for IQ etc ?
Click to expand...
Take pictures. If you like them, the lens is fine.

Or alternatively take a load of artificial test shots. If you take enough you can almost certainly persuade yourself that there is *something* wrong with the lens. Then you can have a really long debate here about whether it's really the lens or whether it's your approach to testing it (ie user error). Either way you won't be happy.
 
 
Last edited:
looks like i'm keeping the lens as the pictures & guides I've checked seem ok :-)
normally don't buy S/H lens so wanted a few pointers how to check ...
cheers for the input guys
 
You must log in or register to reply here.
Back
Top