Hi--

>I read your site and now I need some information.
>I do hope possible.
>I wish more information of the Nikkor lens.
> Nikkor 1,2/55 mm CRT
>weights: 310 grs
>Leica thread mount.
>minimum diafragm: f/11
>lens construction: elem./groups 8-6
>corr. chrom. abberr. range: 400~65 nm
>vignetting: 0% (f4) vignetting insignificant with CRT reproductions
> applications.
>picture angle: 37 degr.
>image size: 24x36 mm (43,2mm dia.)
>original size: 216 mm dia
>image distance at standard magnification: 363 mm
>Above technical details are from a Nikon sheet, who I get from a collector.
>I know the lens are designed for use taking pictures from dat from
>Oscilloscope or other CRT traces.
>
>Q.:
>Because it's has Leica thread can it be used on Bellows for taking
>macro photography? Although the pictures field is very narrowed, due
>to sizes of CRT screens.
>I ask the collector, but hhe did not known.
> Has no experiences with the lens.
>
>I hope you can help me to obtain more then these information given.
>Thanks in advance, kindly greetings,
>Gerard van Beukering
>The Netherlands. BEUKERING@rulfed.LeidenUniv.NL

Hmmm, you have provided me with far more information than I had on the
lens (0, ;-) - BTW, do you have the address of the seller (I may want
to buy one to try). Since the optimum distance is given as 363mm, and
that is close to what a normal focus mount will give at minimum focus,
the lens may be too far out of its design range on a bellows at minimum focus distance for good performance, but it may be worth a try. It might
be an interesting copy lens (but without focus ability) at around 360mm
mounted in a BR-2 adapter, or the Leica-to-Nikon adapter that Nikon used
to make, if the focus distance that results is useful. Otherwise I am
not sure what it would be good for (if short enough, maybe as a good close-up lens to add to the front of another lens....??).
David Ruether