In article <4oigig$1n9o@usenetp1.news.prodigy.com>, JHHJ52A@prodigy.com says...

>Bought a used 300mm F4 AF Nikkor this weekend.
>Normally have a skylight on my lenses for protection.
>This lens will take 82mm in front and 39mm in a drawer.
>Nikon claims the 39mm is REQUIRED for correct operation.
>Most people do not seem to put a filter on the front of this
>lens, but I really want to protect that big front element.
>Question - if I have a 39mm UV in the drawer can I use a
>skylight in front or should I use another UV?

It's up to you - there is no problem, especially since the
L37 rear filter is nearly colorless (and isn't REALLY needed
for correct operation......). I would use whatever filter color
is on my other lenses. (My preference is for UV's, since they are
the most neutral for slide work, and if I mix filter brands, UV's
will match in color better than skylights of different brands
will.) I would use a good quality filter on longer lenses
where filter flatness is more important (Hoyas
and Nikkors are good).
Hope This Helps