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Thread: Velostigmat Series II; Info and Images

  1. #1
    Mark Sawyer's Avatar
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    Velostigmat Series II; Info and Images

    Wollensak’s Velostigmat Series II is a Tessar formula lens introduced about 1909. Series II Velostigmats had an aperture of f/4.5, and came in barrel mounts, Studio, Regno, Autex, Optimo, Betax, and perhaps other shutters. The Series II was Wollensak’s most popular lens, recommended for portrait, group, landscape, and “general use”. It came in quite a few focal lengths, from 3.5 inches through 19.5 inches. The 9.5, 12, 15.6, and 19.5 all had an optional diffusion adjustment that is fairly common, and some of the shorter lenses were occasionally featured it, (I’ve seen a 5 inch model with the diffusion feature).

    The Velostigmat Series II lenses were manufactured until just after WWII, with the later models being single coated (Wolcoated) by the factory. They were renamed the Raptar Series II and put into Alphax shutters in the late 1940’s, and production continued through at least 1957, though without the adjustable diffusion option.

    The adjustable diffusion is one of the more interesting features of the Velostigmat Series II, and one that sets it apart from the many other Tessar lenses available. The adjustment was a rotating front ring that allowed the front element to be unscrewed one rotation, giving it slightly more distance from the other elements. There is some confusion as to how it should be used, but the 1916 Wollensak Lenses and Shutters Catalog explains:

    “The amount of diffusion is variable at will and so places in the hands of anyone artistically inclined, a powerful means of expressing their individuality. It is by no means difficult to manipulate this attachment, by turning the front mount around to the marks 1, 2, 3, 4, or 5, as desired, then focus. When the indicator is set at 0, the lens is ready for general work, producing negatives with snap and life; set at 1, you have a slight diffusion, at 2, a greater degree of diffusion, and so on, the higher the number, the greater the diffusion.”

    In actual use, very little diffusion is evident, even at setting 5. This has led some to try focusing at the 0 (sharp) setting, then dialing in the softness. The rotation, however, causes the focal length to shorten slightly, so the focus-then-adjust method results in an out-of-focus rather than soft-focus image. But the Wollensak catalog makes it clear, set the diffusion, then focus. So what is the “artistically inclined” photographer to do?

    There is a “cheat” possible that allows one to adjust the diffusion far past the factory limited setting of 5, to a setting that would be (by counting the rotations) of 40 or so. At that setting, the Velostigmat Series II has an obvious and (at least in my eyes) lovely soft-focus signature.

    This modification to the lens involves removing one of two restraining screws inside the lens that restrict the rotation to a single revolution. I documented the process on my 15.5 inch Velostigmat Series II to show the procedure:

    1.) Here’s the lens. The front element is to the left, and the seam just behind the front edge of the barrel is the giveaway that this lens has the diffusion adjustment.


    2.) First you need to unscrew the front “beauty ring”, the ring that's engraved with all the lens info and threaded in through the filter threads to hold the front element in. If your lucky, you can do it with the friction of your thumbs. If you can’t budge it and you’re desperate enough, you could drill two small holes on opposite sides of the beauty ring and force it with a spanner wrench. If the front rim is dented, forget trying to thread the ring out. Your best bet is to have someone with very strong hands force the rotation until one of the little screws shears off. I got lucky; mine unscrewed with my thumbs!


    3.) Remove the ring


    4.) Under the ring along the rim you’ll see a little screw. This bumps into another little screw down below it.


    (to be continued...)
    Last edited by Mark Sawyer; 29-Dec-2009 at 01:27.
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  2. #2
    Mark Sawyer's Avatar
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    Re: Velostigmat Series II; Info and Images

    5.) Remove that screw. There’s the little bugger!


    6.) Now you can unscrew the front element as much as you want! Watch out it doesn’t fall off when you’re using it. I always have mine screwed in at least one rotation. Here it is completely unscrewed and off the main body of the lens:


    7.) Put it back together and screw the beauty ring back on…


    (to be continued...)
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  3. #3
    Mark Sawyer's Avatar
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    Re: Velostigmat Series II; Info and Images

    8.) Now instead of adjusting it only this far…


    9.) …you can adjust it this far!


    A word of warning: this also removes the limit of rotating the front element the other way past zero, and over-tightening can jam the front element, making it very difficult to unscrew at all.
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

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    Mark Sawyer's Avatar
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    Re: Velostigmat Series II; Info and Images

    ...and a couple of images made by Velostigmat Series II lenses, both on 8x10, wide open (f/4.5) and waaaay past the factory limits on diffusion...

    From my 12-inch Velostigmat:


    From my 15.5-inch Velostigmat:
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  5. #5
    Dave Karp
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    Re: Velostigmat Series II; Info and Images

    Mark,

    This is great. It would be a good addition as an article in the LF Home Page. If you are interested, shoot a PM to Tuan and chat with him about it. It would never get buried in the Forum that way.

  6. #6
    Mark Sawyer's Avatar
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    Re: Velostigmat Series II; Info and Images

    Glad you like it, David! I'm hoping if we keep it here in the forum, people will add to the thread. And maybe we can start a few more threads on noteworthy lenses with "Info and Images" in the title to make them easier to find in a search...

    The Velostigmat really is a wonderful lens, with all the qualities most people are looking for when they want a "vintage lens" look, sharp or soft. And Wollensak made so many of them, they are affordable and pretty easy to find, especially in the 9.5-inch and 12-inch focal lengths. (BTW, if you ever run across a 19.5-inch for sale, let me know!)
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  7. #7

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    Re: Velostigmat Series II; Info and Images

    Well done - a very logical and well illustrated help to others. Just one question, though.
    The locking screw looks as if the head of the screw is about to give up the ghost? Did you consider a replacement/deeper slot for the next time it needs a repair - or oil the thread?

  8. #8

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    Re: Velostigmat Series II; Info and Images

    Mark, my experience with the lens exactly duplicates yours: if focused at the '5' setting, it was not soft-focus. If focused at '0' and then turned to '5' it was merely out of focus. I don't understand how this lens could be considered soft-focus... seems unremarkable that no photographer of consequence endorsed it, unlike Veritos, Graf Variables, P&S Semi-Achromatics, etc.

    Kudos on your brilliant work-around. It may not be what the designers intended but the proof is in the pudding and those are wonderful images.

    Russ

  9. #9

    Re: Velostigmat Series II; Info and Images

    Attached is an from 1918 for the lens

    Dan

    Antique & Classic Camera Blog
    www.antiquecameras.net/blog.html

  10. #10

    Re: Velostigmat Series II; Info and Images

    And a 1921 Ad on the series

    Dan

    Antique & Classic Camera Blog
    www.antiquecameras.net/blog.html

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