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Thread: Which of my 5 LF lenses are worth keeping or worth upgrading?

  1. #11

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    Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    Quote Originally Posted by manfrominternet View Post
    Bob,

    Do you think I should upgrade any of my lens lineup?
    90mm 4.5 Grandagon N would be superior to what you have now if you can stand the size and weight. Also, it is in a 1 shutter so won’t fit some recessed boards.

  2. #12

    Join Date
    Mar 2019
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    Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    Quote Originally Posted by Bernice Loui View Post
    Nice balanced set of lenses. There is NO reasons to change much if any. The only lens that might be worth considering to change is the 90mm f8 (think this would be a Rodenstock 90mm f6.8 Grandagon, not f8), to a Rodenstock 90mm f4.5 Grandagon. This is a physically BIGGER lens, larger image circle, slightly less geometric distortion.. But IMO, not a significant enough "upgrade".

    No good reason to keep the 135mm Schneider Xenotar, it is a cult lens that just covers 4x5 (spec image circle at f22 of 150mm, 4x5 required image circle 152mm).
    Info on Schneider Xenotar and others of that vintage:
    https://www.pacificrimcamera.com/rl/00832/00832.pdf

    "Upgrading" to APO will NOT make your images better. Better images will come from image making skills, understanding of lighting and shadows, exposure control, technique and all those FAR more important things that directly affect the images you're creating. Give up the belief lens is the primary factor that affects the images made, while the lens is one item, it is not THE item.


    Bernice
    Hi Bernice,

    Thanks for your note! Yeah, I had a slight suspicion that my lens lineup isn’t really bad enough to warrant a significant change.

    I did also want to ask how do I calculate the most optimal f-stop number for each lens?

  3. #13

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    Mar 2019
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    101

    Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    Also, can anyone tell me what the optimal f-stop range for each of my 5 lenses are, or how I can calculate it? While I want my images to be as sharp as possible from corner to corner, I want to also make sure I avoid diffraction and subsequent degradation of image quality.

    So far, this is my estimate. Please let me know if and where I’m wrong. (I’m almost certainly wrong.) :/

    -65mm Nikon Nikkor-SW f/4 ——— f/11-f/16 (the more I stop this lens down, the more pronounced the vignetting)
    -90mm Sinar (Rodenstock) Sinaron W f/8 (Multicoated) ——— f/16-f/32
    -150mm Schneider Symmar-S f/5.6 (Multicoated) ——— f/16-f/32
    -210mm Schneider Symmar-S f/5.6 (Multicoated) ——— f/16-f/32
    -360mm Rodenstock Sironar-N f/6.8 (Multicoated) ——— f/16-f/45

  4. #14

    Join Date
    Sep 1998
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    Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    Quote Originally Posted by manfrominternet View Post
    Also, can anyone tell me what the optimal f-stop range for each of my 5 lenses are, or how I can calculate it? While I want my images to be as sharp as possible from corner to corner, I want to also make sure I avoid diffraction and subsequent degradation of image quality.

    So far, this is my estimate. Please let me know if and where I’m wrong. (I’m almost certainly wrong.) :/

    -65mm Nikon Nikkor-SW f/4 ——— f/11-f/16 (the more I stop this lens down, the more pronounced the vignetting)
    -90mm Sinar (Rodenstock) Sinaron W f/8 (Multicoated) ——— f/16-f/32
    -150mm Schneider Symmar-S f/5.6 (Multicoated) ——— f/16-f/32
    -210mm Schneider Symmar-S f/5.6 (Multicoated) ——— f/16-f/32
    -360mm Rodenstock Sironar-N f/6.8 (Multicoated) ——— f/16-f/45
    They are diffraction limited at f22.

  5. #15

    Join Date
    Jul 2008
    Posts
    1,563

    Re: Which of my 5 LF lenses are worth keeping or worth upgrading?

    This is a set of modern multi coated lenses. They would be optimized for about f22, ideally used between f11 to f45. f5.6 was done to aid focusing.

    As for the smallish image circle of the 65mm f4 SW nikkor, the image circle would be much the same for other 65mm lenses of this type. To gain a larger image circle, moving to a slightly longer focal length makes a significant difference. The 65mm f4 has a spec image circle of 170mm at f16 which is very, very good. The 75mm f4.5 SW nikkor is spec'ed at 200mm at f16.
    http://www.galerie-photo.com/manuels...%20cameras.pdf

    The other way to gain a larger image circle would be the Schneider XL series of 110 degrees -vs- the typical and more common about 105 degrees LF wide angle lenses. Choice really depends in image making needs. Know larger image circle often produces more internal lighting flare due to light bouncing off the bellows on to the film. As with most things, it is a trade off.


    Bernice



    Quote Originally Posted by manfrominternet View Post
    Hi Bernice,

    Thanks for your note! Yeah, I had a slight suspicion that my lens lineup isn’t really bad enough to warrant a significant change.

    I did also want to ask how do I calculate the most optimal f-stop number for each lens?

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