Page 1 of 4 123 ... LastLast
Results 1 to 10 of 38

Thread: G Claron & other process lenses

  1. #1

    G Claron & other process lenses

    G Claron lenses are detailed as being capable of infinity focus when stopped down to f22.

    When taking landscape images I almost invariably use forward tilt and a degree of hyperfocal distance focusing.

    When the G Claron lenses (etc) are described as capable of infinity focus at f22, does this refer to the lens already having been focused out to infinity or take into account a degree of focusing employing hyperfocal distance?

    Knowing the official explanation of this is probably more helpful than trying to work it out by taking a number of shots to see the effect, which is quite expensive where 5x4 film is concerned and which may not lead to a better understanding.

    Extra stopping down beyond a certain point is not usually a good idea either.
    I'd be grateful if anyone has any information on this or even the definitive answer.

    Thanks Geoff

  2. #2

    Join Date
    Feb 2001
    Location
    Blue Jay, CA
    Posts
    2,390

    Re: G Claron & other process lenses

    There are certainly dozens of threads on this subject. Use your G Claron just like any other lens. They are sharp at infinity at f:22 and f:16 in my experience with virtually the entire line up. I suspect infinity looks just fine at f:11 too, but I haven't actually tried that. You don't have to stop them down to get a sharp image at infinity. There is no "effect" to see and test for. If you really must test, take one photo at infinity at f:16 and you'll see what I mean.

    Several people have reported that the later ones are optimized for more distant objects but I've not seen anything official on that. My experience is with new and old versions.

  3. #3

    Join Date
    Feb 2001
    Location
    Blue Jay, CA
    Posts
    2,390

    Re: G Claron & other process lenses


  4. #4

    Join Date
    Oct 2013
    Location
    Bow, NH
    Posts
    1,311

    Re: G Claron & other process lenses

    My 270mm G-Claron is extremely sharp - I use it for landscapes and other detail studies, typically at f/16 or 22. You should just take it out and shoot with it...

  5. #5
    Corran's Avatar
    Join Date
    Apr 2011
    Location
    North GA Mountains
    Posts
    8,181

    Re: G Claron & other process lenses

    I could be misinterpreting but it sounds like you are asking whether or not the lens will have a sufficient image circle when employing hyperfocal focusing and/or tilts.

    If so, generally the answer is yes, of course depending on the focal length you are using. The GC lenses are well-known for very generous image circle specs.

    If your question is about image quality, well, I think that's also a foregone conclusion - excellent all around.
    Bryan | Blog | YouTube | Instagram | Portfolio
    All comments and thoughtful critique welcome

  6. #6

    Join Date
    Feb 2001
    Location
    Blue Jay, CA
    Posts
    2,390

    Re: G Claron & other process lenses

    I interpreted the question as starting from the position that the lens couldn't handle infinity, but could you still get there by stopping down. But I could be wrong.

  7. #7
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    15,409

    Re: G Claron & other process lenses

    Just because G Clarons were originally advertised for closeup tabletop photography and were especially well corrected for this doesn't mean they're any less suitable for infinity than a general-purpose plasmat. In fact, they're even better than most at infinity, even at f/11, though smaller stops like f/22 are more frequently employed due to other issues like film plane flatness, variations in subject plane relative to swings and tilts, etc. They're wonderfully versatile lenses
    in the field.

  8. #8

    Join Date
    Nov 2009
    Location
    Sheffield, UK.
    Posts
    574

    Re: G Claron & other process lenses

    Quote Originally Posted by Drew Wiley View Post
    Just because G Clarons were originally advertised for closeup tabletop photography and were especially well corrected for this doesn't mean they're any less suitable for infinity than a general-purpose plasmat. In fact, they're even better than most at infinity, even at f/11, though smaller stops like f/22 are more frequently employed due to other issues like film plane flatness, variations in subject plane relative to swings and tilts, etc. They're wonderfully versatile lenses
    in the field.
    +1 this.

  9. #9

    Join Date
    Jan 2013
    Location
    Madisonville, LA
    Posts
    2,333

    Re: G Claron & other process lenses

    I'd waste the 4x5 film since everyone responding may not know anymore about the question than you do.

  10. #10
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    15,409

    Re: G Claron & other process lenses

    Nonsense, Luis. I've been shooting and printing G-Claron images for decades, both color and b&w. So have a quite number of other people on this forum.

Similar Threads

  1. Process lenses as enlarger lenses???
    By Leigh in forum Darkroom: Film, Processing & Printing
    Replies: 13
    Last Post: 16-May-2011, 09:48
  2. Process lenses, what will I get?
    By Noeyedear in forum Lenses & Lens Accessories
    Replies: 7
    Last Post: 15-Jan-2010, 02:40
  3. Process lenses vs made for landscape lenses
    By Herb Cunningham in forum Lenses & Lens Accessories
    Replies: 16
    Last Post: 17-Feb-2008, 21:37
  4. Process/APO-Nikkors vs APO-Ronar, G-Claron, Fuji A
    By Tony Karnezis in forum Lenses & Lens Accessories
    Replies: 10
    Last Post: 30-Nov-2004, 12:26

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
  •