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Thread: I FINALLY Understand... Bokeh & Aperture Roundness

  1. #1

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    I FINALLY Understand... Bokeh & Aperture Roundness

    It finally "clicked" in my diseased old brain.

    I've often pondered the elusive "creaminess" of the out-of-focus areas of some lenses. What appeals strongly to me are sharp highly corrected high-contrast lenses with lots of aperture blades. None of my modern lenses have such an aperture. They all have the typical out-of-round apertures.

    I DO realize there are other qualities that differentiate modern lenses from classic but... it's ONLY the round apertures that interest me.

    Are there modern shutters into which I can transfer my #0, #1, and #3 sized cells? I realize I'll need new scales. That's okay.

    BTW, I don't need flash sync.

  2. #2

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Earlier versions usually have more blades. All of the Compur shutters I have had have nice round apertures, the most recent being a mid 80s Compur 3.
    One man's Mede is another man's Persian.

  3. #3

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Thank you... I'll search for Compur shutters.

  4. #4
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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    The shape of the aperture is far from the whole story.

    http://www.trenholm.org/hmmerk/ATVB.pdf

    My favorite lenses for bokeh are the Apo-Sironar-S series, in late-model Copal shutters. YMMV.

  5. #5
    Format Omnivore Brian C. Miller's Avatar
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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    You need a Bokemeter, but this one only measures in micro Bokeh for 35mm. You'll need to get the Drem (makers of the Instocope) extinction bokemeter with the nine tube design and the test target. This was sold as the Glasgnademeter (glass grace meter), but its measurements correspond to over 1 giga-bokeh, which is useful for banquet format cameras and lenses.
    "It's the way to educate your eyes. Stare. Pry, listen, eavesdrop. Die knowing something. You are not here long." - Walker Evans

  6. #6

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Or you can use shutter without blades at all, and get cheap old lenses with rounding leafs and do transplants of sort... I believe it was one of Tair (old USSR) lenses that had like 21 leaf... Or just make waterhouse-like ones yourself Perfect round or any shape you like (hear shaped ones were all the craze last year i believe)

  7. #7

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Quote Originally Posted by Brian C. Miller View Post
    You need a Bokemeter, but this one only measures in micro Bokeh for 35mm. You'll need to get the Drem (makers of the Instocope) extinction bokemeter with the nine tube design and the test target. This was sold as the Glasgnademeter (glass grace meter), but its measurements correspond to over 1 giga-bokeh, which is useful for banquet format cameras and lenses.
    No! That's a solid-state Bokemeter. Anyone knows you need a hollow-state, AKA vacuum tube Bokemeter.


    Some actually took it seriously! ( sobbing with laughter smiley)
    One man's Mede is another man's Persian.

  8. #8
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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Quote Originally Posted by Brian C. Miller View Post
    You need a Bokemeter
    That is *delicious*. I want one.

  9. #9

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Quote Originally Posted by Brian C. Miller View Post
    You need a Bokemeter, but this one only measures in micro Bokeh for 35mm. You'll need to get the Drem (makers of the Instocope) extinction bokemeter with the nine tube design and the test target. This was sold as the Glasgnademeter (glass grace meter), but its measurements correspond to over 1 giga-bokeh, which is useful for banquet format cameras and lenses.
    You should have back dated this post to April 1.

  10. #10

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    Re: I FINALLY Understand... Bokeh & Aperture Roundness

    Oren... I'll studying that. I'm hoping that I can gain quite a bit by simply moving my modern lenses into shutters with very round apertures. I do realize that's not everything but I want to keep my cake and eat it too.

    Others... okay... maybe I am crazy. But at least I have an excuse. My neurologist tells me so. :P

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