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Thread: Fastest lens?

  1. #11

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    Isn't there some heliars around 105-135mm f/3,5?
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  2. #12
    Ole
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    Fast/odd? That's the Schneider Xenar Typ D. They're "reverse Tessars", f:3.5, said to be "unsharp wide open and not improving much on stopping down".
    -- Ole Tjugen, Luddite Elitist
    Norway

  3. #13

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    Thanks again..

    Domenico (and anyone else) what's so different about the tessar 165 f2.7?

    I am into swirly nonsense, so magic lantern lenses etc sound good..
    Keep 'em coming..
    d

  4. #14

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    If you really want to play around, try a single lens, positive meniscus or planoconvex. Can be found at surplusshed for $4 - $10, use their 'lens finder'-function. Not for those who try to eliminate abberations though. Mount it in a homemade barrel with a stop right in front and voila; or put it in an old shutter.
    They usually get kind of sharp in the middle, and by middle I mean just that. At the corners you just got blur. That goes for the short lenses anyway, and my own attempts I might add.

    I've used two versions of single element lenses with some Rollei IR and an f.stop around 16 - 22.

    Gr.

  5. #15
    Domenico Foschi's Avatar
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    Quote Originally Posted by David White View Post
    Thanks again..

    Domenico (and anyone else) what's so different about the tessar 165 f2.7?

    I am into swirly nonsense, so magic lantern lenses etc sound good..
    Keep 'em coming..
    d
    It really isn't a good lens optically, especially wide open and yes, it will give you some swirl although not as much as a petzval lens.
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  6. #16
    Polybun
    Quote Originally Posted by keithwms View Post
    N.b. some of the fast old aero lenses had a mildly radioactive element and will thus have yellowed by now.... making them effectively a good deal less fast than they once were.
    You can use the old UV light soak trick to bring them back to clear I bet. I've had several of the old screw mount pentax lenses yellow on me, about 4 weeks in direct sunlight made them look like new again.

  7. #17
    Ralph Javins's Avatar
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    Good morning;

    Now it is clear that I can only echo the comments by Polybun: My old Minolta lenses also have some mildly radioactive elements in their construction. Usually this makes them turn a light yellow in color as you look through the lens. A couple of weeks in direct sunlight or UV (ultra violet) light seems to restore them to normal.
    Enjoy;

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  8. #18
    CBG
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    If you just want FAST, and quality is no issue, maybe you could make up a lens from big magnifying glasses. Should be pretty fast, and quality to be ashamed of.

    C

  9. #19
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    I have a 135mm Rodenstock Eurynar that is a f/3.5. It is uncoated and I like the way it looks on film. I have never seen another one though since I bought it a few years ago. I picked it up on ebay attatched to a Welta 9x12 folder for $100.

    Patrick

  10. #20
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    By the way you could try using the front group of a cheap telephoto. That would get you a fast lens.

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