Results 1 to 15 of 15

Thread: aperture size questions

  1. #1

    Default aperture size questions

    I know this has nothing to do with taking good photographs, but i really want to know.

    When they say f/1, does it mean that the aperture diameter is the same length as the focal length?

    So for zoom lens, the actual aperture size for the different focal length would vary in size to keep it at say f/2, right?

  2. #2
    Moderator daredevil123's Avatar
    Join Date
    Oct 2005
    Location
    lil red dot
    Posts
    21,627
    Blog Entries
    1

    Default Re: aperture size questions

    Quote Originally Posted by whattokingu View Post
    I know this has nothing to do with taking good photographs, but i really want to know.

    When they say f/1, does it mean that the aperture diameter is the same length as the focal length?

    So for zoom lens, the actual aperture size for the different focal length would vary in size to keep it at say f/2, right?
    Theoretically yup. But I have never seen a f/1 before. Have you?

  3. #3

    Default Re: aperture size questions

    Quote Originally Posted by daredevil123 View Post
    Theoretically yup. But I have never seen a f/1 before. Have you?
    the famous leica 50mm f/0.95.
    Thanks for the snappy reply.

  4. #4
    Senior Member zac08's Avatar
    Join Date
    Feb 2005
    Location
    East
    Posts
    11,755

    Default Re: aperture size questions

    Quote Originally Posted by whattokingu View Post
    I know this has nothing to do with taking good photographs, but i really want to know.

    When they say f/1, does it mean that the aperture diameter is the same length as the focal length?

    So for zoom lens, the actual aperture size for the different focal length would vary in size to keep it at say f/2, right?
    Yes, it varies to match the focal length if the lens is a constant aperture lens.

    The lower end zoom lens have a fixed apeture over a focal length range and thus have a variable aperture range.
    Michael Lim
    My Flickr Site

  5. #5
    Moderator daredevil123's Avatar
    Join Date
    Oct 2005
    Location
    lil red dot
    Posts
    21,627
    Blog Entries
    1

    Default Re: aperture size questions

    Quote Originally Posted by whattokingu View Post
    the famous leica 50mm f/0.95.
    Thanks for the snappy reply.
    No wonder Leica lenses are still so darn expensive.

  6. #6
    Senior Member dennisc's Avatar
    Join Date
    Oct 2002
    Location
    Freezing Upp Thomson/Mandai!
    Posts
    2,008

    Default Re: aperture size questions

    Who knows... the current prime range is like

    f1= $$, $$$ - $$$$
    f1.2 $$$$
    f1.8 $$$
    F2 $$$

    and so on

  7. #7
    Moderator daredevil123's Avatar
    Join Date
    Oct 2005
    Location
    lil red dot
    Posts
    21,627
    Blog Entries
    1

    Default Re: aperture size questions

    Hmmmm, apart from being expensive, I wonder how the f0.96 handles. I have a Nikon f/1.2 and the DoF on that is so thin that it is not easy to handle especially when it is a MF lens.

  8. #8

    Default Re: aperture size questions

    u mean the 50 f/1.2? thats a lens for astro photography!



    Anyway there were rumors that nikon wanted to do a f/0.85 lens. haha. but never happened.

    Just to side track, on a Macro lens, eg Sigma 150, it's stated as f/2.8, but when it's at it's min foc distance, it's a 5.6. Am i confusing you? haha. It's only a 2.8 at Infinity focus.

  9. #9

    Default Re: aperture size questions

    [QUOTE=Complex13717421;5465142]u mean the 50 f/1.2? thats a lens for astro photography!

    Nikon specially designed a lens for low light photography, the legendary
    58-mm f/1.2 Noct-Nikkor, which have been designed for optimum correction of coma.
    This lens is excellent for wide-field astrophotography because the image is sharp from
    edge to edge even shoot wide open at f1.2, but it is tag at astronomical price.
    Last edited by aquilaa; 25th September 2009 at 04:08 PM.

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

    Default Re: aperture size questions

    Quote Originally Posted by whattokingu View Post
    the famous leica 50mm f/0.95.
    Thanks for the snappy reply.
    Yeah, with a US$15K price tag.
    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

    Default Re: aperture size questions

    WOW, that's like $$$$$. Photography is really a great business to be in if you have passion for it. I am seeing it from the manufacturer's point of view.

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

    Default Re: aperture size questions

    Quote Originally Posted by whattokingu View Post
    WOW, that's like $$$$$. Photography is really a great business to be in if you have passion for it. I am seeing it from the manufacturer's point of view.
    Apologies. the 15K price tag should be in SGD.

    Here's the link but price in sterling pounds, so convert to SGD is around $15K.

    http://www.dpreview.com/news/0809/08...50mm_f0_95.asp
    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

    Default Re: aperture size questions

    WOAH!!!!

  14. #14

    Default Re: aperture size questions

    [QUOTE=aquilaa;5465478]
    Quote Originally Posted by Complex13717421 View Post
    u mean the 50 f/1.2? thats a lens for astro photography!

    Nikon specially designed a lens for low light photography, the legendary
    58-mm f/1.2 Noct-Nikkor, which have been designed for optimum correction of coma.
    This lens is excellent for wide-field astrophotography because the image is sharp from
    edge to edge even shoot wide open at f1.2, but it is tag at astronomical price.
    Someone selling this lens at $2500 BNP

    http://www.clubsnap.com/forums/showt...ight=58mm+noct

  15. #15
    Moderator daredevil123's Avatar
    Join Date
    Oct 2005
    Location
    lil red dot
    Posts
    21,627
    Blog Entries
    1

    Default Re: aperture size questions

    Quote Originally Posted by Complex13717421 View Post
    u mean the 50 f/1.2? thats a lens for astro photography!



    Anyway there were rumors that nikon wanted to do a f/0.85 lens. haha. but never happened.

    Just to side track, on a Macro lens, eg Sigma 150, it's stated as f/2.8, but when it's at it's min foc distance, it's a 5.6. Am i confusing you? haha. It's only a 2.8 at Infinity focus.
    Eh, is it? I have the AiS 50/1.2 and it does not look at a astro photography lens. My dad got it for his F2AS back in the day. Here is a link to some info on this lens.

    This lens is still in production, and sells for slightly over 1k SGD. Not that expensive. Now the 58/1.2 is totally another matter....
    Last edited by daredevil123; 25th September 2009 at 04:28 PM.

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
  •