Another cheap lens for UV Photography....

Discussion in 'General Technical Discussion' started by kds315, Aug 7, 2006.

  1. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    Group,

    the EL Nikkon 3.5/63mm (all metal body) is quite famous for its ability to be used in the 350..400nm range for reflected UV photography. This is quite a sharp lens, but unfortunately harder and harder to find.

    I ran some spectrophotometer tests today and found out that the older EL Nikkor 4/50mm (all metal body) aside from having about 10% less overall transmission, shows the same spectral transmission in the 300..400nm range; so this could serve as a replacement. Both lenses work best close up, but if infinity focus is needed, have to be deep mounted into some "surgically" prepared helicoid. Bjoern Roerslett [sad, that you left...] has already reported about that procedure here.

    Klaus


    EL Nikkor 4/50mm
    EL_NIKKOR_4_50mm.

    EL Nikkor 3.5/63mm
    EL_NIKKOR_3.5_63mm1.
     
    Last edited by a moderator: Aug 8, 2006
  2. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    Group,

    here for comparison some other UV lenses I tested:

    Zeiss UV Planar 4/60mm:
    UVPlanar60mmk.

    Rodenstock UV Rodagon 5.6/60mm:
    UVRodagon60mmk.

    Wollensak UV Anastigmat 4":
    WollensakUVAnastigmat4inchk.

    Wollensak UV Amatar 10 1/2":
    WollensakUVAmaton10inchk.

    Klaus
     
  3. PJohnP

    PJohnP

    Feb 5, 2005
    Klaus :

    Thanks for the information on this lens. I found one on eBay for $20 shipped, which is a far cry from the prices the Nikkor EL 63mm has been reaching.

    Now I just have to get the filter (and the time) to shoot with this thing.

    Again, thanks for all of your research on these lenses.



    John P.
     
  4. Chris101

    Chris101

    Feb 2, 2005
    Arizona
    Very cool graphs Klaus, that 4 inch Wollensak looks great! I spec'd a Xenatar from an old TLR that looked promising:
    https://www.nikoncafe.com/vforums/showthread.php?t=57674

    What kind of spectrophotometer did you use, cause I'm actually more interested in the spec than the lens. :redface: I'm gonna guess a Spectronic 1200 cause of the discontinuities where the filter changes (I had one that did just like that.)
     
    Last edited by a moderator: Mar 15, 2017
  5. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    John: You're most welcome and I'm looking forward to seeing your results here! Ask me if I can provide assistance, I'm glad to help!

    Chris: Since this is all my private investment, I bought an old, built like a tank Kontron Uvikon some months ago, which works quite OK, with autoscan etc. but shows these bumps sometimes...

    Klaus
     
  6. Chris101

    Chris101

    Feb 2, 2005
    Arizona
    Very cool Klaus - ya gotta respect a man with a personal spec!

    I found the bumps could be mitigated by cleaning the filters which might be located on a wheel right before the monochrometer.
     
  7. PJohnP

    PJohnP

    Feb 5, 2005
    Klaus :

    It will be a little while out for me on this. The D200 is not supposed to be the best Nikon DSLR for UV or IR work, and I'm not changing my backup D100 over to IR or UV quite yet.

    But.

    I was able to sneak in and get this lens for a very reasonable price. I'm now seeing them for anywhere from US$75 to $125, which is a bit steep for my interest. Getting in for $20 delivered made this an easy decision.

    I'll be watching with interest to see if this lens gets the attention that the 63mm f/3.5 did, with escalating prices. I think that Bjørn Rørslett's comments here at the Café and on his site may have had an effect on the market. It's almost amusing to see just how many folks on eBay wholesale lift shots from his site, let alone the ones who merely quote or cite him.

    Out of curiosity, did you mention this on any other fora ? If it's just here, and we see a spike in prices, it might well show the degree to which the Café is being read by many people.

    Then again, it might just be some other factor... :rolleyes:



    John P.
     
  8. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    The creepy story of the Wollensak 4" UV Anastigmat

    Wollensak 4" UV Anastigmat and that is its story

    Late in 1950 there was a number of large iron metorites than landed in the northeast of the United States. Upon examination a great many had a solid and perfect core of a crystaline substance that resembled the finest of optical glass. The owner of Wollensak being a man of quirk and varied interests decided to purchase a number of the meteorites and saw them, grind and polish them to make a few lenses. The meteors were quite large but the glass was quite brittle so in the end only a few lenses were made...this being the one, the finest, the 'sample' of the series.

    The lens seemed to have a fire within itself, no doubt due to the experiences and conditions that the crystal was made..flying at untold speeds for untold millenia over millions of miles. The sky is a big place, the galaxy is even greater. This lens...oh this lens, is something very special. It seems though to have been at the center of a number of accidents at the factory.

    While the cutting took place a shard flew from the block and pierced both eyes of machinist, later during the polishing process a young apprentice caught his sleeve in the polisher which broke his wrist then as he struggled with his other arm in a vain attempt to free himself he managed to catch that one too. It snapped like a twig, he fainted and fell forward at which point the collar of his shirt was caught in the polisher and it snapped his neck.

    Truly a sad tale of woe which cannot be entirely brushed away with coincidence. While the lens was being coated it was noted through the window that the magnesium fluoride wasn't melting so the technician entered the oven to adjust the thermostat only find that the oven was on, in seconds his clothing was on fire and he was completely disfigured. While all this commotion was going on small chirps were heard to come from the lenses, some say it was the glass contorting in the mounts while others say...it was the lenses laughing.

    I am not here to scare you or to ward you away from this lens, I am here to tell you a little about their history and to forewarn you ...perhaps for your own good.

    This lens throws a 4" circle of death...I mean light! It makes a perfect circle in the center of my 5x7. The glass is coated and I can see one or two fine cleaning wisps. The image is sharp in the center and when stopped down takes on an eery sharpness that is almost X-ray like in quality, creepy and interesting.


    So this is what came with the lens, creepy is it?

    Klaus
     
  9. ColdPizza

    ColdPizza

    156
    Apr 20, 2006
    Arlington, VA
    Klaus,

    All very interesting. I currently shoot with a Series E 35/2.5 that I removed the front and rear coatings from. I get UV signatures, but due to the meager transmission in some of the spectral ranges, the imagery isn't as nice as some of the other UV lenses.

    Do you happen to know if these would be better choices - an upgrade from my current setup?
     
  10. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    Hard to tell without having seen any pictures. I haven't done this procedure, but I doubt that it will do wonders since also the glass transmission is important.

    Can I see some results?

    K
     
  11. ColdPizza

    ColdPizza

    156
    Apr 20, 2006
    Arlington, VA
    Sure. It is a lens that Bjorn Rorslett recommends - I followed his advice and picked one up. I posted some examples here and he responded that the transmission was weaker in some of the areas and that was what accounted for my results.

    The original thread:

    https://www.nikoncafe.com/vforums/showthread.php?t=70306&highlight=Coldpizza

    I will have to wait until I am at home to post some images - I no longer have them hosted anywhere and will have to re-post.
     
    Last edited by a moderator: Mar 15, 2017
  12. kds315

    kds315

    486
    May 30, 2006
    Dr Klaus Schmitt
    Thansk, would appreciate that since I haven't followed the original thread!

    Klaus
     
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