Site Sponsors
Results 1 to 14 of 14

Thread: Most aperture blades in a lens?

  1. #1
    Senior Member
    Join Date
    Dec 2007
    Location
    Reykjavik, Iceland
    Posts
    2,310
    Post Thanks / Like
    Images
    9

    Most aperture blades in a lens?

    I was just looking at my old 5cm summarit, and it has 15 aperture blades that form a near perfect circle at all apertures. Are there any lenses with more aperture blades than that? I assume it is going to skew towards older lenses and rangefinder lenses since they did not require automatic stop down. I am guessing maybe some of the old large format portrait lenses have lots and lots of blades, but does anyone know of lenses with more than 15? That seems like a lot...
    My photos are here: http://www.stuartrichardson.com and more recent work here: http://stuartrichardson.tumblr.com/ Please have a look at my book!
    My lab is here: http://www.customphotolab.is and on facebook

  2. #2
    Super Duper
    Senior Member

    Join Date
    Nov 2008
    Posts
    3,848
    Post Thanks / Like

    Re: Most aperture blades in a lens?

    As soon as I saw the title to this post, I was thinking '15', thinking of older Leitz lenses. That's still more than at least this large format portrait lens:


  3. #3
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,594
    Post Thanks / Like
    Images
    21

    Re: Most aperture blades in a lens?

    Stuart, I never bothered to do these counts on the countless lenses I have.

    A quick cursory look of the largest lens (weight >18 Kgs) I have, an OPTICOPY U.H.R. 585 f/7 shows a count of 20 blades, perfectly circular from wide open to all the way down.

    The diaphram diameter is ~15 cm.

    I have a feeling that this isn't the most number of blades in a lens that I have.

  4. #4
    Senior Member
    Join Date
    Dec 2007
    Location
    Reykjavik, Iceland
    Posts
    2,310
    Post Thanks / Like
    Images
    9

    Re: Most aperture blades in a lens?

    Haha, interesting. 20 blades is quite a lot! 18kg's is not too shabby either. That's more than I use at the gym for bicep curls...
    My photos are here: http://www.stuartrichardson.com and more recent work here: http://stuartrichardson.tumblr.com/ Please have a look at my book!
    My lab is here: http://www.customphotolab.is and on facebook

  5. #5
    Senior Member Lars's Avatar
    Join Date
    Nov 2007
    Location
    Sunnyvale, California
    Posts
    1,811
    Post Thanks / Like
    Images
    19

    Re: Most aperture blades in a lens?

    My APO-Nikkor 1:9 f=610 mm has 12 blades. But it only weighs about 2 kgs so it's a bit wimpy. It is, however, a moderate wideangle lens - huge coverage circle, probably 600-700 mm.
    Monochrome: http://mochro.com

  6. #6
    Super Duper
    Senior Member
    jonoslack's Avatar
    Join Date
    Nov 2007
    Location
    East Anglia & Cornwall (UK)
    Posts
    11,778
    Post Thanks / Like
    Images
    1

    Re: Most aperture blades in a lens?

    Quote Originally Posted by Vivek View Post
    Stuart, I never bothered to do these counts on the countless lenses I have.

    A quick cursory look of the largest lens (weight >18 Kgs) I have, an OPTICOPY U.H.R. 585 f/7 shows a count of 20 blades, perfectly circular from wide open to all the way down.

    The diaphram diameter is ~15 cm.

    I have a feeling that this isn't the most number of blades in a lens that I have.
    Wow . . .I've been googling that lens, and all references lead back to . . . . . Vivek!
    So,
    1. how many lenses do you have
    2. how many diaphragm blades (in total)

    Just this guy you know

  7. #7
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,594
    Post Thanks / Like
    Images
    21

    Re: Most aperture blades in a lens?

    Jono, Just a few hundred (I think. I am not good at cataloging.). Very meagre compared some people I know- that I am confident of.

    After I bought the G1, I searched through one pile and found out that I had a Schneider Xenoplan 25/1.9 (four bladed aperture ) and it was usable.

    All the APO Nikkors, Process Nikkors and such have 12 blades. They do not form circular shapes when stopped down.

    The Xero-Nikkor 135/2 (it is a big lens, though light weight, would cover ULF) I have has 15 blades and yes it does form circular apertures at all the stops.

  8. #8
    Senior Member
    Join Date
    Nov 2007
    Location
    Mexico
    Posts
    525
    Post Thanks / Like
    Images
    2

    Re: Most aperture blades in a lens?

    the other question is:

    Least aperture blades in a lens?

    It has to be 3.

    This reminds me of the movie "9", I would love to have a lens with the apperture in the eyes of #1.

  9. #9
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,594
    Post Thanks / Like
    Images
    21

    Re: Most aperture blades in a lens?

    Quote Originally Posted by gero View Post
    the other question is:

    Least aperture blades in a lens?

    It has to be 3.
    Zero. Perfect circles. Many lenses.

    There are two bladed apertures as well.

    Example: Minoctar lenses in Minox 35mm cams.

  10. #10
    Senior Member Lars's Avatar
    Join Date
    Nov 2007
    Location
    Sunnyvale, California
    Posts
    1,811
    Post Thanks / Like
    Images
    19

    Re: Most aperture blades in a lens?

    Quote Originally Posted by Vivek View Post
    All the APO Nikkors, Process Nikkors and such have 12 blades. They do not form circular shapes when stopped down.
    Yep it's far from perfect. It came with waterhouse stops too (it's a single blade with a hole in it that you slide into the lens to use instead of the variable aperture).
    Monochrome: http://mochro.com

  11. #11
    Senior Member Per Ofverbeck's Avatar
    Join Date
    Feb 2008
    Posts
    503
    Post Thanks / Like
    Images
    5

    Re: Most aperture blades in a lens?

    Biggest number on any lenses I´ve owned were either an old Kilfitt Makro-Kilar 90 mm, or a Novoflex Follow-Focus 5.6/400. I don´t have either lens now, so I can´t count´em, but they were MANY (I dismantled the Novoflex once for cleaning; don´t ever do that.... ), and the apertures were almost perfectly circular.

    Fewest were 2, or 1 depending on what qualifies as a diaphragm mechanism. My Minox 35 had 2 blades, giving a ´cat´s eye´ look to the lens. An old Agfa cheapie had one - a strip of sheet metal with a hole in it, which you either swung out of the way for wide open (f/5.6) or swung in for f/11 (´sunny´). And, they were PERFECTLY circular, both of ´em...

  12. #12
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,594
    Post Thanks / Like
    Images
    21

    Re: Most aperture blades in a lens?

    Quote Originally Posted by Lars Vinberg View Post
    Yep it's far from perfect. It came with waterhouse stops too (it's a single blade with a hole in it that you slide into the lens to use instead of the variable aperture).
    Lars, The APO Nikkors came with waterhouse stops. Everything was sold in a custom wooden box.

    Not all the process Nikkors (that include some APO Nikkors) were offered with waterhouse stops though.

    Nevertheless, none can be found wanting with their image quality. Gems!

  13. #13
    Senior Member
    Join Date
    Nov 2007
    Location
    Mexico
    Posts
    525
    Post Thanks / Like
    Images
    2

    Re: Most aperture blades in a lens?

    I want those gogles!


    http://www.youtube.com/watch?v=OnoJecu9e7c

    at the frame 1:46 / 2:06

    That looks like 3 independent blades with a rotating aperture.
    Last edited by gero; 26th May 2010 at 06:50.

  14. #14
    Senior Member M5-Guy's Avatar
    Join Date
    Apr 2010
    Location
    Camby, Indiana
    Posts
    466
    Post Thanks / Like
    Images
    12

    Re: Most aperture blades in a lens?

    I one owned a Leitz 5cm Summarit (LTM) with 18 blades.... all my Voigtlander have 10, My 90mm Summicron has 12. Not sure on my Sigma EX lenses... 9 maybe?

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •