Results 1 to 17 of 17

Thread: Why can't all lens come with 9 rounded aperture blades?

  1. #1

    Default Why can't all lens come with 9 rounded aperture blades?

    Does it really add up significant cost to the lens to have a 9 rounded aperture blades for a lens? Cos I find that lens that have 9 aperture blades tends to produce better bokeh. Eg. I have the 50mm AFD1.8, at f1.8, the bokeh is still rounded but when I reduce the aperture to f2.8 onwards, it start to produce hexegon shape bokeh.

    Is there really a lot of cost savings to the production to have a 7 aperture blades instead of 9 and compromise on the bokeh?
    Last edited by DeadEnd; 14th February 2007 at 04:27 PM.

  2. #2

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    tell me

  3. #3

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Money talks

  4. #4
    Deregistered
    Join Date
    Feb 2006
    Location
    @ AMK
    Posts
    2,616

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    well...you can email the manufacturer...see what they reply...

  5. #5
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    From what i know, my Tamron 28-300 uses 9 diaphragm blades.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  6. #6
    Senior Member
    Join Date
    Apr 2005
    Location
    270 degree of Singapore
    Posts
    6,741

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    one of the advantage of Minolta/Sony lenses is it circular shaped blades to produce round or close to round bokeh highlight even when stopped down.
    Last edited by zcf; 14th February 2007 at 09:33 PM.

  7. #7

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by westwest1 View Post
    well...you can email the manufacturer...see what they reply...
    Isn't this a newbies section? Well, I don't know why that's why I ask this question here hopefully the gurus here have a answer for it.

    And I don't think the manufacturer will bother to answer this. Cos there might be a conspiracy theory behind for consumers to upgrade to a 9 rounded aperture blade at a huge profit margin to them.

  8. #8

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by Snoweagle View Post
    From what i know, my Tamron 28-300 uses 9 diaphragm blades.
    Yup my Tamron 90mm also have 9 blades but not rounded. But my 24-120mm VR have 7 rounded blades

  9. #9

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by DeadEnd View Post
    And I don't think the manufacturer will bother to answer this. Cos there might be a conspiracy theory behind for consumers to upgrade to a 9 rounded aperture blade at a huge profit margin to them.
    I think you kinda answered your own question. Its all marketing making people pay more for those little extras. Maybe its also more difficult from an engineering standpoint...
    Furry Photos - Photography for the Modern Pet

  10. #10
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by DeadEnd View Post
    Yup my Tamron 90mm also have 9 blades but not rounded. But my 24-120mm VR have 7 rounded blades
    Well don't have to be so perfect unless u're the type who's extremely particular abt bokeh, else a normal 7-diaphragm blade should be enough.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  11. #11
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by Snoweagle View Post
    Well don't have to be so perfect unless u're the type who's extremely particular abt bokeh, else a normal 7-diaphragm blade should be enough.
    imho, sometimes it is very easily to see funny shaped bokeh without really going around looking at the bokeh.

  12. #12
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by ExplorerZ View Post
    imho, sometimes it is very easily to see funny shaped bokeh without really going around looking at the bokeh.
    Not really, unless u really go take careful note of it, but they're more evident when taking lights.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  13. #13
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by Snoweagle View Post
    Not really, unless u really go take careful note of it, but they're more evident when taking lights.
    a good example if you want... shot using 80-200 a 9 blade straight aperture. if the backlight spot is stronger, im sure the hexagon bokeh will look worse.
    Last edited by ExplorerZ; 15th February 2007 at 08:44 PM.

  14. #14
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by ExplorerZ View Post
    a good example if you want... shot using 80-200 a 9 blade straight aperture. if the backlight spot is stronger, im sure the hexagon bokeh will look worse.
    Looks gd enough already. Yes the hexagon one or the pentagon one will definitely look not as gd, but still acceptable.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  15. #15

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by ExplorerZ View Post
    a good example if you want... shot using 80-200 a 9 blade straight aperture. if the backlight spot is stronger, im sure the hexagon bokeh will look worse.
    The 9 blade bokeh still look acceptable. The 7 blade bokeh is ugly

  16. #16
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    Quote Originally Posted by DeadEnd View Post
    The 9 blade bokeh still look acceptable. The 7 blade bokeh is ugly
    yup, definitely agree.

  17. #17
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Why can't all lens come with 9 rounded aperture blades?

    I suppose 9 blades are the max?
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

Bookmarks

Posting Permissions

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