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  1. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Peter,

    You water images in this region are spectacular. The IR look is very toned down, but transformative in scenes like this.

    Sandy
  2. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Many lenses have hot spots near the center of the image, varying in size due to aperture and size of the element itself causing the problem. These almost always have a specific color or hue that can...
  3. Replies
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    12,166

    Re: Howtek utilities question

    I believe you need a Windows machine to run the FST.

    Contact me by forum mail and included your personal email and I will send you a .pdf of the 4000/4500.

    Sandy
  4. Re: Does a Photograph's medium change your opinion of it?

    Doremus,

    Thanks for the clarification.

    I hope you enjoy a re-read of Crawford's book, especially the part about photographic syntax. It is in my opinion the best read ever that touches on the...
  5. Re: Does a Photograph's medium change your opinion of it?

    To be clear, my message re: Marshal McCluan was a quote form an web article, not an expression of my "polarized linear thinking". To understand exactly what McCluan meant would require a full reading...
  6. Re: Does a Photograph's medium change your opinion of it?

    Marshal McLuhan’s 1964 breakthrough book “Understanding Media” famously said that a medium and its characteristics can affect audiences apart from its substance: “The medium is the message.”

    Sandy
  7. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Jon

    Lovely image!

    Sandy
  8. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    From the guide.

    "Infrared light is slower than even the slowest red light visible to us. This makes it totally imperceptible to us visually, but that doesn't make it any less important."

    In...
  9. Re: Why is "The Lounge" subforum blocked if you're not logged in?

    Thanks, that makes a lot of sense.

    Sandy
  10. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Jon, Peter, Tin Can

    I appreciate your kind comments about my IR work. But to be honest it is in fact fairly difficult to understand what kind of lighting conditions work best for the kind of...
  11. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Jon,

    Thanks for your comment.

    I had the same problem working in bright conditions with a converted D800, and solved it with a similar solution to your viewfinder. But it is hard to find one...
  12. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Attached are two IR images I made several years ago, one of the Anderson Quarry near Columbia, SC, and another of a village in Songyang County in China.

    The image of the quarry was made with a...
  13. Thread: Americana

    by sanking
    Replies
    36
    Views
    6,815

    Re: Americana

    I also like the photos a lot, wish I had done more of this kind of work in the 60s and 70s.

    You make a good point about the culture. Many regions in the United States have unique cultures that...
  14. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Interesting point, and with very low signal strength I am sure you are right. I have from time to time experienced a condition in photographing in nature in areas where there was no artificial light...
  15. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    In general I agree with your point, but in a specific condition where leaves moving because of wind is concerned the only way to improve the situation is to increase ISO to the point where the...
  16. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    As one move up in size from 1" to APS size cameras to FF and/or MF, lenses get larger and larger, and in these formats I find it more convenient to use full spectrum camera with one or two high...
  17. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    That is a spectacular image! You sure found a great vantage place from which to photograph Interstate 5.

    And with the right tonal adjustments that would also be a great image in monochrome.
    ...
  18. Re: Potentially useful LEDs for darkroom/alt applications

    Wow,

    You da man!

    That unit should give you a great exposure unit for UV processes. With floods placed at 8-12" from the exposing plane you should have fast exposures and very even exposure...
  19. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Hi Jon

    BTW, I just received a pack of five IR filters you mentioned a couple of weeks ago or so (680nm, 720nm, 760nm, 850nm and 950nm) for a full spectrum Fuji mirrorless camera. I already have a...
  20. Re: Potentially useful LEDs for darkroom/alt applications

    Bob

    I am getting older, but still not as ancient as you think!

    The carbon arc light was invented in the first decade of the 1800s and was the first practical electric light. It was widely...
  21. Re: Potentially useful LEDs for darkroom/alt applications

    John

    I tested one of the units last December and posted my findings on the groups.io site on 12/10/2020. I address your question in that post, which I am copying here along with other commends.
    ...
  22. Re: Potentially useful LEDs for darkroom/alt applications

    Jim

    You are very welcome.

    One more general comment. Although there is an efficient heat shield on the back of the units I would still recommend ventilation of the backs of the units with air...
  23. Re: Potentially useful LEDs for darkroom/alt applications

    The NuArc metal halide lights radiate in several UV bandwidths and for this reason are useful for a wide range of processes that have different bandwidth requirements for exposure. The downside is...
  24. Replies
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    Re: Paper for both Kallitype and Platinum?

    You may be right about that. I made some beautiful prints with large in-camera negatives with pt/pd toned kallitypes, but with some papers could not avoid a slight veiling of the pape outside of the...
  25. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    218777218778


    Couple of recent shots from nearby, one is a kudzo rich scenes from near Bat Cave, NC. The other a view of Chimney Rock. Kudzu is very impressive in SC and NC this year, due to warm...
  26. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    "No, it's a lens property - how many wavelengths it was designed it to focus simultaneously. "

    Exactly, and I suspect that the Apo-Lanthar would give very good results in IR, unless of course it...
  27. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Hi Alan,

    If you are using the IR Chrome filter on the lens with a full spectrum camera is it correct to assume that this is what you see in RAW? If so, that would make it a kind of true color,...
  28. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    I love the look of the back lighted live oaks. The old buildings in Charleston are awesome, but in the low country I am also drawn by the forms and shape of the old live oaks, especially in IR with...
  29. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Yes, in the viewfinder would be slightly out of focus, but not on in live view with the LCD monitor.

    I began using digital IR cameras around 2003 but the great break through in image quality for...
  30. Re: Carbon Transfer Workshop, Oct. 20 - 23, 2021, Yosemite Valley

    Vaughn,

    Sorry to hear about the cancellation of your carbon transfer workshop at Yosemite. Hope you have better luck next year.

    And Don, thanks for your report of the carbon workshop at the...
  31. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    [QUOTE=jon.oman;1610228]For full spectrum converted cameras, I found a supplier the provides a package of five filters. 680nm, 720nm, 760nm, 850nm, and 950nm.

    Thanks Jon,

    That is good value...
  32. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Peter,

    Wonderful image.

    St. Simon's Episcopal Church is an an old church in Newberry County, SC from the same period as the Estonian Lutheran Church, perhaps slightly older. ...
  33. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    The Fader will work with a full spectrum camera just like a visual one so it is potentially useful to help understand your possibilities with both fully visual and full spectrum cameras, or for that...
  34. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Jon,

    The hot mirror filter is essentially what is removed for a full spectrum or IR conversion, so it functions on your camera just like the original filter.

    BTW, there is a filter by Fotga...
  35. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    [QUOTE=jon.oman;1609515]
    For a mirrorless camera, does the EVF still work? Can you use it to frame and focus on your subject? Assuming you already have a 720 nm filter on the lens and you are hand...
  36. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Yes, if your camera is mirrorless or has live view.

    Attached is a brief article about full spectrum conversions.
    https://kolarivision.com/articles/full_spectrum_conversion/

    Sandy
  37. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    These two images were made with the 720 nm filter, using the same Sony a7r 11 conveted to full spectrum camera.

    My approach to use of IR is a bit different from most as I tend to avoid the very...
  38. Thread: Digital IR

    by sanking
    Replies
    569
    Views
    15,972

    Re: Digital IR

    Here is a shot I made with a full spectrum camera using a 680 nm filter. Plants often go completely white with 720 nm or higher conversions, and in this shot the leaves of the plant would have had no...
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    Re: Digital Negative Printer Recommendation

    Bob makes a point that should not be ignored. Making any kind of print with alternative methods nearly always requires a lot of skill with the process. Making a high quality color gum over palladium...
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    Re: Oregon Public Broadcasting segment

    Very nice interview, Jim. Congratulations.

    Jim is one of a handful of people in the world with expertise in printing carbon with very large continuous tone film negatives.

    Sandy
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