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Thread: +1+2+4+10 = 17

  1. #1
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    I just had to do this! :P

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  2. #2
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    Now, that figures to be 59mm, but I'm not sure were to measure to verify that.
    At infinity, it sits back far enough that I can drop the camera bed.

    My present trap door aperture set up gives me the option of f/1.7, f/3.8 and f/9.4.

    These are all on Efke PL25 souped in 09 1+100 for 18 minutes.

    PL25 is too fast for f/1.7 on a sunny summer day, so, I only worked with f/3.8 and f/9.4 - all the time convinced I should have used the 8banners shutter holding smaller apertures.
    But I was lazy.
    Laziness paid off though, see the " +10+3 and +4+10" thread.

    So, I head out to McSherry and take this shot at f/3.8 Attached files

  3. #3
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    And I had to fiddle with the tension and use another curtain to slow the old Folmer down for f/9.4

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  4. #4
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    Take a look at the center sharpness at f/9.4 ...

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  5. #5
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    Hello Everyone!

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  6. #6
    500+ Posts Daryl's Avatar
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    +1+2+4+10 = 17

    Notice no center hot spot?

    Well, with 8 glass/air surfaces, I had to try a landscape shot with the sun in the pic! Attached files

  7. #7
    Administrator Tom Persinger's Avatar
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    +1+2+4+10 = 17

    f3.8 is fantastic... if only the vignetting to black was a tiny bit softer...

  8. #8

    +1+2+4+10 = 17

    ho! that's quite a lens flare! haha :-)

    I agree with tpersion, the vignette is quite strong.

  9. #9

    +1+2+4+10 = 17

    NIce round reflections instead of those ugly pentagonal things you see in movies.

  10. #10

    +1+2+4+10 = 17

    Dear Daryl , if you can ,
    It would be a good lesson If you stack a pinhole and zone plate with these lenses and put here some pictures .
    Glass + pinhole
    Glass + zoneplate
    Glass + pinhole + zoneplate
    zoneplate + pinhole
    glass
    pinhole
    zoneplate

    I need a fixed lens for homemade Horizon with trail camera 3d camouflage paint.
    I need to compare solutions as many for different reasons .

    Best ,
    Umut

    Because it is there _ Mallory

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