Thursday, January 13, 2011

[UV, IR] A surprising lens without UV + IR focus shift IV: EL-Nikkor 5.6/80mm

Well, I had mentioned that my orchids started to blossom again, so why not take a chance and try out an old friend: EL-Nikkor 5.6/80mm (the older black/chrome version)

The sequence is: UV (through Baader-U), VIS (through UV/IR Cut filter), IR (through B+W 092)

[click on image to see a larger one]

and here the same sequence but showing left and right differentials (VIS-UV, VIS-IR):

No focus correction was done during the shots using a single 400Ws adjustable Xenon flash and ND filters to balance out the exposure differences, so as to ensure an identical light direction.

And here a multispectral composite image by assigning UV->blue, VIS->green, IR->red and combining into one image without further ado.

I find that result quite interesting ... as it hardly shows focus shift, but hardly anyone seems to use it ;)

P.S.: the 80mm EL-Nikkor (the older, chrome black full metal type) has an adapter ring on its base with outer M39x26tpi screw mount (Leica enlarger mount). Beneath it is a M25 thread for older #00 shutters. Company Schneider Optics offers adapter rings, if that one should be missing (oder code 92-013251).
P.P.S.: the filter thread of that older EL-Nikkor 80mm is 34.5mm, which is pretty uncommon, as me if you need an adapter ring.

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site