On Thu, 26 Nov 1998 20:29:04 -0500, "Titus" wrote:

>I just brought my new slides from the lab. The center is very sharp, but the
>margins are out of focus.
>I visually checked the slides and the frame (paper) is not keeping the film
>perfectly flat.
>What one should do in such a case? Should I return the to the lab and ask
>them to change my frames?
>Have you ever had this kind of problem?

This is normal, and it is why "curved field" projection
lenses are made... Some people remount slides between
thin pieces of glass to keep the slides flat, but
this is time-consuming, and it generates its own problems.