5cm F2.8 Xenon (5-element version), Adapted to M-Mount. One-of-a-kind

Discussion in 'Adapted Lenses' started by Brian, Oct 27, 2014.

  1. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    This is Raid's "New Lens", the only one like it in the world. This lens was originally an Uncoated 5cm F2.8 Xenon, pre-war Retina II. Somewhere along the way, it was converted to RF coupled M-Mount. The front element was unusable and the focus would not go to infinity. Then, Raid found a coated 5cm F2.8 Xenon - from a later Retina, made into a C-Mount lens. Looked great, the rear element was unusable.

    So- the results of the transplant, rear group from the uncoated lens, front group from the C-mount lens, and the rubber cement that was formerly used to hold the barrel into the focus mount -and also prevented infinity focus- is GONE!

    At F2.8, on the M8.

    Not ready for the cemetery just yet!

    15459009738_87da19eb03_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    15645153295_97da732da4_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    15642451011_6148371600_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    15459161697_b1219a995c_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr
     
  2. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    More-

    15645153965_8485cbebdc_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    15024990983_a9ea079357_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    15459010398_4bc3a75722_b. Xenon 5cm F2.8, M-Mount by fiftyonepointsix, on Flickr

    Not the easiest lens to focus- I think this was hacked into a C-Mount, then into M-Mount using an adapter. The RF cam is accurate from infinity to just under 3ft.

    So- I am guessing that Raid has the most unique M-Mount Xenon in the world. I'll be content with having the most unique S-Xenar. Both 5-element designs, but different optical formula. The Xenon is a derived from the Planar, the S-Xenar is derived from the Tessar.
     
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  3. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Thank you for our expert work, Brian. The images look good.
     
    • Like Like x 1
  4. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    The OOF in the posted images is quit good, actually. So now we have an uncoated rear element and a coated front element. Could this be a match made in (Brian) Heaven? The coated front element is good for reducing glare and flare, while the uncoated rear element reduces the contrast a little, for a charming creamy look? Did I get that correct?
     
  5. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    Yes- I think that is an accurate description. The reverse of the Sonnar 5cm F2 that I "mismatched" for you several years ago.

    The Bokeh is very smooth on this lens, it is very well corrected- this lens is different from the post-war 5cm F2.8 Xenon used in the Retina IIc and IIC. I tried a front section from one of mine before receiving the second donor lens.
     
  6. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I will most likely use it as a portrait lens on the M8 or the EP2.
    How is my lens different from your post-war Xenon?
     
  7. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Brian did a great job in putting together the glass elements for my M mount Xenon. I tried it out today on the M9. The images came out very nice, I think. I will post tomorrow some photos of the lens and by the lens & camera. The colors came out beautiful.
     
    • Like Like x 1
  8. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Brian: I did not see any vignetting with the lens hood that came with the lens. The only little annoyance is that the 50mm frames do not show up correctly. I get something like 70mm frames with the 50mm LTM adapter.
     
  9. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    I noticed that as well- the person that made this lens must have had an RD-1 or Bessa R series film camera. The adapter was made into a lens mount for this one.

    The pre-war Xenon 5cm F2.8 is a 5 element design, I believe the post-war F2.8 lens was a 6-element "truncated" F2.
     
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  10. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I added the ltm-M CV adapter, Brian. It was on a Heliar 50/1.5.
    Is there a chance that the true focal length of the adapted lens is not 50mm?
    The mix of pre-war and post-war elements certainly has not hurt how this lens performs.
    Do I have a "5.5 element design" lens?
     
  11. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I took this lens out for a "drive" yesterday. I stepped outside our home for a few quickies on the front porch.

    Xenon%20M9%20NOV-2-XL.


    Xenon%20M9%20NOV-10-XL.


    Xenon%20M9%20NOV-8-XL.


    Xenon%20M9%20NOV-6-XL.


    Xenon%20M9%20NOV-5-XL.
     
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  12. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    A few hours later, we took a drive along the beach, and the light was very nice.
    All images are without any modification by me, and the images were opened by LR5. and exported over as jpg images.


    A young man was exposing his dog for her first swim in the Gulf of Mexico.

    Xenon%20M9%20NOV-12-X2.


    Pensacola Beach at sunset


    Xenon%20M9%20NOV-16-X2.


    Pointing the camera towards the West

    Xenon%20M9%20NOV-19-X2.

    Xenon%20M9%20NOV-25-n-X2.

    Xenon%20M9%20NOV-22-n-X2.
     
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  13. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Stingrays

    Xenon%20M9%20NOV-17-X2.


    Xenon%20M9%20NOV-18-X2.
     
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  14. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    Xenon%20M9%20NOV-20-n-X3.
     
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  15. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    It focused correctly across the full range on my camera, so I think it is close 50 the Leica standard.

    The adapter brings up the framelines, is it possible you put the the wrong one on it? Or the adapter is not correctly keyed?
     
  16. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I think it is a 50/135 adapter, and for some reason, the 50mm are not showing up.
     
  17. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    The ltm mount sticks to the adapter. What is a good way for removing the M adapter without tearing up the lens to pieces!
     
  18. Brian

    Brian Super Moderator Subscribing Member

    Apr 3, 2013
    That's why I thought it was permanent! This lens is bizarre- the helical will start to come undone after the normal range if focus. I'm going to make something up: use a rubber cork on the inside of the lens to hold the helical in place, and then try unscrewing the adapter...
     
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  19. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    I used an old Leica rear lens cover, and it allowed to unscrew the ltm-M mount. It was the wrong one for this lens with VF (35-90). I replaced it with a 50 ltm adapter, and I now see the 50mm frames.
     
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  20. raid

    raid Leica Place All-Pro

    Apr 12, 2013
    USA
    Raid
    We drove to Destin (Florida) in addition to Pensacola Beach a few days ago.

    Xenon%20NOV16--16s.

    Dolphins were plenty around

    Xenon%20NOV16--20crops-L.

    Xenon%20NOV16--19s-L.


    Xenon%20NOV16--14s-M.

    Xenon%20NOV16--12s-M.


    Xenon%20NOV15--7s-M.

    Xenon%20NOV15--5s-M.

    Xenon%20NOV15--6s%20crop-L.
     
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