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Thread: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

  1. #11
    Tin Can's Avatar
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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    I think it was common

    and now I do recall front markings for rotating out for soft

    Jim Galli was/is an influential SF guy

    I need to dive into my lens bank today

    I most likely will be back with pics
    Tin Can

  2. #12
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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Pics not necessary

    Perhaps we should ask the Wollensak expert

    I have 2 iterations of a similar lens, Gundlach 300mm 4.5 Radar is heavier

    The second is in better condition, Velostigmat Series 2 300mm 4.5 and much lighter

    Some members told us to unscrew front or back to make it slightly SF
    Tin Can

  3. #13

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    @diverisity... So what do the images through the lens look like, either on GG or negs? Are they in focus; are they soft; are they sharp, as Gundlach intended?

  4. #14
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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Both are more sharp if stopped way down

    as usual

    I need to mount one on a 8X10 Home Portrait lensboard
    Tin Can

  5. #15

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Quote Originally Posted by Tin Can View Post
    Both are more sharp if stopped way down

    as usual

    I need to mount one on a 8X10 Home Portrait lensboard
    Thanks, Randy. As one would expect from a Tessar design lens, which both RAdar and Velostigmat (probably) is. The Velostigmat name was used over such a large period of time I'm just not too sure about them.

    I was really asking @diversey about his lens. Something looks potentially modified or improperly assembled about it.

    BUT... look at this one... it appears very much like yours, @diversity... most don't seem to have as much thread showing as yours and this one... Could this be "normal" manufacturing/assembly variation?

    https://www.ebay.com/itm/37432347790...Bk9SR_zvoc-dYQ

  6. #16

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Brian: I did see a soft image on GG at F4.5, wide open. It was hard to tell this soft image was due to “soft focus. David

    Quote Originally Posted by BrianShaw View Post
    @diverisity... So what do the images through the lens look like, either on GG or negs? Are they in focus; are they soft; are they sharp, as Gundlach intended?

  7. #17

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    It is hard to believe that the front ring from this high grade lens could not be completely screwed in, even after disassembling and cleaning.


    Quote Originally Posted by BrianShaw View Post
    Thanks, Randy. As one would expect from a Tessar design lens, which both RAdar and Velostigmat (probably) is. The Velostigmat name was used over such a large period of time I'm just not too sure about them.

    I was really asking @diversey about his lens. Something looks potentially modified or improperly assembled about it.

    BUT... look at this one... it appears very much like yours, @diversity... most don't seem to have as much thread showing as yours and this one... Could this be "normal" manufacturing/assembly variation?

    https://www.ebay.com/itm/37432347790...Bk9SR_zvoc-dYQ

  8. #18

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    The Wollensak Velostigmat is a Tessar design. Some versions allow you to move the front element outward to achieve soft focus (I had a 12" and never tried it). Some people here (Mark Sawyer?) did not think it went far enough, and found even softer focus by modifying the lens barrel to allow more un-threading of the front element. There's a thread here somewhere that explains it.
    The Gundlach Radar is a different design with more lens elements, not a Tessar AFAIK. Gundlach and Wollensak were cross-town competitors back in the day. I have not used a Radar lens (a pre-WWII name btw, not connected with today's radar technology), but can't imagine why the front element protrudes, as here. A little testing might give the answer.

  9. #19

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Quote Originally Posted by BrianShaw View Post
    As one would expect from a Tessar design lens, which both RAdar and Velostigmat (probably) is. The Velostigmat name was used over such a large period of time I'm just not too sure about them.
    The Velostigmat name was used on a variety of lenses of different types. They were differentiated by the Series label.

    Velostigmat Series 1/1a -> Convertible lens closer to a Protar I think.
    Velostigmat Series II -> based on the Tessar design.
    Velostigmat Series III/IIIa -> Wide angle (not Tessar or Protar based)
    Velostigmat Series IV -> lower cost and slower lens which I think is based on the Tessar design.

    I hope Whir-Click chimes in as he would be more familiar with the details for each series.

    -Darren

  10. #20

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    Re: Gundlach Radar 12” anastigmat, a soft focus portrait lens?

    Quote Originally Posted by Mark Sampson View Post
    The Gundlach Radar is a different design with more lens elements, not a Tessar AFAIK. Gundlach and Wollensak were cross-town competitors back in the day.
    4.5 Radar is indeed the Gundlach equivalent of a Tessar design with the extra element to avoid patent infringement: 5 element 3 groups with 2 separated in front of the aperture and 3 cemented at the back.

    http://www.eenportfolio.nl/Gundlach_jul1930.pdf

    The Radar WA (wide angle) is a completely different lens design.

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