UV photography with Nikkon Enlarging lenses

[Rolland Elliott <rolland_elliott@xxxxxxxxx>]

This post is for everyone who's interested in UV photography!

I've been doing some research about UV photography over the last
couple of months, and recently got a true UV filter made by B+W.  The
only problem is that I now need a lens that will pass UV light (most
modern multicoated optics supress UV light substantially, and
unfortunately, all of the lenses I own are modern and multicoated.)  I
though I would have to buy some super old non coated Nikon lenses to
use with my camera, but I heard that these older lenses usually are
not corrected in the UV range, producing unsharp pictures. However, 
it looks like Nikon Enlarging lenses might be better than old uncoated
lenses for UV photography see below:

Here's some interesting information I picked up from a Nikon Catalog
about their enlarging lenses:

EL-Nikkor enlarging  lenses are corrected for chromatic aberration
beyond the visible spectrum into near ultraviolet wavelengths --
wavelengths to which photographic papers are particularly sensitive. 
Through the use of special optical glass and matching optical
coatings, EL-Nikkor lenses are designed for ultraviolet transmission
in the 350 to 450 nm range. This means EL-Nikkor enlarging lenses can
be used for color separation in addition to all other enlarging
applications. EL-Nikkor lenses are also front threaded to accept screw
in accessories , and can be used for exceptional small-object
photography when mounted on a bellows.

These enlarging lenses don't have the spectral transmission of a true
UV quarts lens, but then again they don't cost $3000 US dollars like
Nikon's quartz lens.

My only problem now is to figgure away to mount these enlarging lenses
on my Nikon N90s camera.  I need some kind of adapter that goes from
the Nikon F-mount to a 39mm thread that is deep enough to allow me to
turn the lens in and out of the mount for focusing purposes.

I'd appreciated any insight from those who might have  tried this.

Sincerely,

Rolland Elliott

==
Rolland Elliott
25D Janet Circle 
Bridgeport, CT  06606
(203) 371-8412

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