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  1. Re: Wollensak Velostigmat Series II 12" inch f4.5 diaphragm shape

    For a Studio shutter, that’s above average.

    I find that any asymmetry is barely visible at normal portrait taking apertures (f/16 and wider), and I have never noticed an ill-effect on the film...
  2. Re: 24 inch Red Dot Artars: Brass vs Aluminum?

    Brass RD 24” here; I had SK Grimes cut standard 67mm filter threads into the front cell. Couldn’t be happier. 215985
  3. Re: Lens Nimenclature and lens Designe: Raptar vs Paragon

    Here are the optical designs of many commonly encountered Raptar lenses, from the 1954 Wollensak catalog.
    215519
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    Re: Carrying the 12x20

    I measure about 6.5” internal depth on my Gator case at the shallowest, most tapered point.

    It’s a padded but flexible case, so even though the Gundlach catalog lists my 12x20 as 7.25” thick, it...
  5. Re: Suggest a 12" (300mm) lens for portrait work on 8x10?

    If you found the uncoated Wollensak Velostigmat Series II lacking a bit of punch for your taste, consider the coated Raptar 4.5 successor. A little more contrast, but with the classic Tessar...
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    Re: 150mm - 165mm for 4x10

    *For the sake of completeness I’ll add that Wollensak did briefly make a third 6.25” wide angle lens that covers 8x10, a f/6.8 4/4 lens with optional coating offered only from 1946-1947. This version...
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    Re: 150mm - 165mm for 4x10

    The Wollensak jungle isn’t so bad if you have a guide. There are two common* Wollensak 6.25” (159mm) wide angle lenses that cover 8x10: a f/9.5 and a f/12.5.

    The f/9.5 is an 8/4 design available...
  8. Thread: optar 203mm

    by Whir-Click
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    Re: optar 203mm

    This is an old thread, but since I have a new interest in the lens I’ll post a reply to the OP’s question for posterity.

    The 203mm f/7.5 Raptar (also Optar) is the same basic 4/4 dialyte type as...
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    Re: Mounting a 14" f6 Veritar on Toyo 810M

    That is one good looking Veritar!
  10. Re: What is this shutter on a Vesta Portrait lens?

    avid1, the short answer is maybe, and I’ve just sent you a longer answer in a PM.
  11. Re: What is this shutter on a Vesta Portrait lens?

    avid1, what a drag! Is there a screw missing in the circled area? With the shadow I couldn’t be sure, but a missing blade screw is the only thing I can think of that could cause the blade to slip...
  12. Re: What is this shutter on a Vesta Portrait lens?

    As usual, Mark is right! I measured, and although the “TB” shutter and the Alphax have identical minimum and maximum aperture dimensions, the Alphax shutter’s diaphragm indicator lever travels...
  13. Re: What is this shutter on a Vesta Portrait lens?

    Hi avid1, that Alphax shutter will work with your Vesta lens cells. It appears to have a lever to be fired by an external solenoid rather than internal flash synch. My guess is that the Ilex box and...
  14. Re: What is this shutter on a Vesta Portrait lens?

    avid1, beautiful picture! You’re really showing the Vesta’s characteristics to great advantage.

    It couldn’t be simpler to put the 7” Vesta in an Alphax or Betax #3, just unscrew the cells from...
  15. Re: What is this shutter on a Vesta Portrait lens?

    I have been intrigued by the shutter in the post, not only because it doesn’t appear in any Wollensak catalogs, but also because the “I” in “TBI” does not appear original.

    I had the good fortune...
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    Re: Introducing Alphax Betax Shutter Services

    Just a modest update that I now also offer CLA services on Wollensak's Studio shutters and iris diaphragm barrels.
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    Re: Aerostigmat 10'' 250mm f/4.5

    The compendium on my website is limited to Wollensak lenses and shutters for commercial still cameras: I had to set a boundary or I’d go crazy trying to encompass the entire menagerie of Wollensak...
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    Re: Leaf Shutter High Speed

    “ Thanks, but is that actually a slow motion video at the fastest shutter speed, or is it being manually opened and closed in real-time?”

    Opened and closed manually in real time with the preview...
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    Re: Leaf Shutter High Speed

    Here’s an Alphax 5 shutter opening and closing nice and slow: https://alphaxbetax.files.wordpress.com/2019/01/shutter-blades-demo.mov
  20. Re: Lens mounting flanges - measurements and other info

    I think it’s worth including shutter flanges since, in Wollensak’s case at least, there is considerable interchangeability between lens barrel and shutter flanges. For example, if you’re looking for...
  21. Re: Lens mounting flanges - measurements and other info

    This is a worthwhile endeavor. Given the uncertainties in measuring threads, it is helpful to have original dimensions as a reference wherever possible. To that end, I have attached flange thread...
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    Sigmar Sightings

    I was browsing completed eBay sales and saw that KEH sold three Sigmar portrait lenses in quick succession back in May: the 16, 19, and 22. I am agog! One could wait patiently for a decade...
  23. Re: Were Verito 18 lenses made in different barrel lengths?

    The Verito design was changed in 1920. You can read about the differences in the pages from Wollensak’s Lensology and Shutterisms V. 8 No. 4 below.

    Your longer barrel with the fleur-de-lis is...
  24. Re: Were Verito 18 lenses made in different barrel lengths?

    Can you add some comparative pictures of the two Veritos side-by-side? The older-style Verito (in a brass barrel or black barrel with the fleur-de-lis) appears a bit longer than the later versions,...
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    Re: Turner Reich Triple Conv. date..

    I had number 215036 for a time, also coated, in a very early Alphax #4 shutter that dated to ‘48 or ‘49.

    I think 1947 is a reasonable estimate for your lens.
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    Re: Turner Reich Triple Conv. date..

    I have number 212716 in a Betax #4 shutter marked “11-46” on the back.
  27. Re: What is this shutter on a Vesta Portrait lens?

    I apologize for mis-typing above: a 2.42” male thread will fit a Betax #4.

    Your picture and measurements clear it up, though, your Verito is mounted in a Wollensak #5 lens barrel, in-between the...
  28. Re: What is this shutter on a Vesta Portrait lens?

    Some 8.75” Verito lenses are a factory-direct fit into Betax #4 shutters, while others appear in Betax #5 or Studio shutters. If your Verito lens barrels are 2.42” female thread, then you can...
  29. Re: What is this shutter on a Vesta Portrait lens?

    This is an interesting, nondescript cousin of Wollensak’s Auto/Regno/Victo/Ultro family of shutters, 1914-1919. I haven’t seen it in any catalogs, but maybe a brochure or “Lensology and Shutterisms”...
  30. Re: Wollensak Serial Numbers: Request for Known Dates

    I appreciate you taking time to look, and am interested in any else you find (or don’t find!) in your Betaxes.
  31. Re: Wollensak Serial Numbers: Request for Known Dates

    Thank you for showing that Studio and Optimo shutters have serial numbers. Nevertheless, if these’s a date scratched on the back of those Studio shutters, I’d be interested to know it.

    Let me...
  32. Re: Wollensak Serial Numbers: Request for Known Dates

    For a sanity check on shutter production vs. service date, I looked at the Betax’s two less-popular sister shutters that I have on hand. The Gammax is marked 5-22 on the back, and the Deltax is...
  33. Re: Wollensak Serial Numbers: Request for Known Dates

    Hi Garret and Jim, I hear what you’re saying. Here’s why I think it’s very likely that these penciled/scratched dates were made by the Wollensak factory at the time of manufacture:
    - I’ve handled...
  34. Re: Wollensak Serial Numbers: Request for Known Dates

    Mark, you put your finger on the challenges of this task. Here’s what I’ve found, and why I think we can make progress:

    - Royal Anastigmat/Velostigmat/Raptar serial numbers appear sequential from...
  35. Wollensak Serial Numbers: Request for Known Dates

    I am taking my shot at correlating Wollensak lens serial numbers with production dates. Original documentation appears lost to the ages, but significantly improved understanding is possible.
    ...
  36. Re: Are the higher shutter speeds on large format lenses always off?

    Dan, Jim, and Jody hit the nail on the head. The observation that top speeds seem 1/2 to 1 stop slow reflects the limitations of testing leaf shutters with commonly available equipment. At the...
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    Re: Waterhouse slot for 8 3/4 inch Verito

    Here are the aperture sizes if you decide to go the shutter route.
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    Re: 209mm f/4.5 Raptar Copy Lenses

    Wollensak shows the Raptar Copy Lens design in their ~1962 booklet “Raptar Lenses for the Graphic Arts.”

    201232
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    Re: 209mm f/4.5 Raptar Copy Lenses

    For those of you who don’t care to sit through the video, I’ll summarize: all of the remaining lenses were purchased as a strategic reserve of Johnny 5 robot eyes.
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    Re: 209mm f/4.5 Raptar Copy Lenses

    This is an old thread, but in case anyone is curious where all those surplus 209mm Raptar Copy Lenses suddenly disappeared to: https://youtu.be/iGx1yy8hNYY
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