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  1. Re: Very rich historical lens diagram resource and additional materials

    There wouldn’t be much to help with until I get the prescriptions pulled into Zemax and then saved. That takes time to set them up properly, which includes identifying currently available glasstypes...
  2. Re: Very rich historical lens diagram resource and additional materials

    I have a long-running project of converting all the designs on dioptrique into modern zemax format. Zemax is the most commonly used optical design tool...once converted, the database will be a...
  3. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    The first production representative prototype is here!

    197241

    Steve at Chroma Camera just received his copy as well. We will use these to draft an assembly procedure and verify functionality. .
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    Re: Whole Plate, 8x10

    Probably about half 5x7 sales. It’s not a lot, but it’s enough to know that there is interest. I think what holds it back is lack of modern cameras, so I put a bug in Steve Lloyd’s ear about...
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    Re: Whole Plate, 8x10

    Let me correct one of your assumptions about whole plate: I will make any size dry plate needed for as long as there is a demand. I shoot whole plate myself (as you know), and so will always make...
  6. Re: Glass Plate 4.5 x 6.5 Holder compatibility

    Get or make a plater adapter insert 8x10 -> whole plate for 8x10 plate holder.
  7. Re: Cleaning up old plate holders and camera

    Awesome!
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    Re: How about some infrared images

    Woodmont Barn, Hollis NH in Infrared


    Just came across some large sheets of Kodak Aerochrome. Before I cut it down, I couldn’t resist running an 8” x 10” sheet through my 2D. 12” Kodak...
  9. Re: Greta Thunberg wet plate photos by Shane Balkowitsch

    Shane does awesome work. I don't care who he photographed, this is a great set of pictures.
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    Re: October - put up or shut up

    I have plenty of opinions about optics and emulsion, so as penitence..

    8x10 J Lane Speed Plate Ortho 25 dry plate of Max and his wife Kelly. Max is a mechanical engineer who recently joined...
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    Re: Foam for lens case

    Drew has a good recommendation to visit McMaster Carr. That’s usually the first source to look for hardware for engineers at work... think Lowes or Home Depot but for engineers who get paid to...
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    Re: Foam for lens case

    Outgassing is going to be a problem for long term storage with foam. The suggestion of slots in a wooden case is best. Line the slots with felt and ensure the lens can’t jostle around when the lid...
  13. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    You weren’t expecting the hack job prototype to go forward into hackjob production were you? ;)
  14. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    An update post-campaign!

    We have high-quality renders of the (very near) final design, as well as reporting of the preliminary weights of the holders. You can see the full update here:
    ...
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    Re: Shelf life of J Lane Dry Plates

    Peter yeah but just be aware of condensation issues
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    Re: Shelf life of J Lane Dry Plates

    I put an expiration date of two years out from when I coat them. That two years is based on hauling plates around in the cab of my truck through summer and winter for two years straight, after which...
  17. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Aaannnd done! Fully funded with plenty to spare. Now we make these real.

    Cheers,
    Jason
  18. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Thanks Kent!
  19. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Thanks Roger and yeah we have the light traps figured out. K.I.S.S. method (Keep It Simple, Stupid!) and not reinventing the wheel helps.

    Cheers,
    Jason
  20. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    8 hours until campaign end.

    Thank you to all who have supported the campaign.

    Cheers,
    Jason
  21. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Campaign ends THIS WEEKEND! Sundat at midnight Eastern.

    The campaign is fully funded, so the holders *will* happen. If you want to get in on the first production run, now’s your chance.
  22. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Final week of the campaign!

    I'm happy to announce that the campaign reached its funding goal last week, so these holders *will* become a reality. With the campaign ending at midnight on September...
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    Re: A new lens cleaning experience

    Hydrogen Peroxide as bought at the store also cleans fungus very well.
  24. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Thank you!

    I’ve been on vacation for the past week and getting ready to head back, so this was a nice way to wrap it up.

    Of course, now the real work begins. Final design review, wrap up...
  25. Re: Allowing Lens Availability to Dictate Format Choice

    Dan, some evidence of rebounding film interest.. Henning Serger reported in post 23 of this thread a tens of millions unit backlog amongst the major film manufacturers....
  26. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Just over two weeks to go and almost to the goal. If you have been considering pledging support but were waiting to see if it would be successful, here is your chance to help reach the goal.
    ...
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    Re: Late August 2019 Portraits.

    Portrait Test Victim #2

    J Lane Dry Plate (experimental emulsion)
    8" x 10" Kodak 2D

    Fallowfield No 2 11" Petzval @ f/4

    https://live.staticflickr.com/65535/48555250596_3c5ea88152_c.jpg
  28. Re: KORONA 11x14 " ULF / Alan Brubaker refurbished

    Hehe nothing's boring about any of this stuff. :)

    Have fun!

    -Jason
  29. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    This evening I saw that we had passed the 66% mark. 2/3 of the way there, but still a long way to go! Thank you to those who have already pledged support, and thanks in advance to those who plan to....
  30. Re: KORONA 11x14 " ULF / Alan Brubaker refurbished

    If you want to shoot plates without the inconcenience of the chemicals, try shooting dry plates. Very similar look.
  31. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    In Update #4, we talk about our work on sheet film adapters and reducing adapters that will be available after the campaign ends.
    ...
  32. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    By popular demand (well at the request of a handful of people), I've added a reward to the campaign for a combination of 5x7 and 8x10 holders.

    Also, if you are going to support the campaign but...
  33. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    See if it works now
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    Re: spherical aberration solved?

    Nah there’s easier ways. It’s all about the right tool for the job.

    The form or I guess you could say the design approach you show is used for focusing x-rays and other very high energy...
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    Re: spherical aberration solved?

    Very cool, jac
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    Re: spherical aberration solved?

    Incorrect. In fact, spherical aberration can be corrected with a single surface. Sir Isaac Newton corrected spherical aberration, lateral color, spherochromatism, astigmatism, and distortion with...
  37. Re: J Lane Dry Plate ASA 2 Characteristic Curve - latest batch

    Done!
  38. Re: J Lane Dry Plate ASA 2 Characteristic Curve - latest batch

    Hi Andrew,

    Makes it orthochromatic. :)

    Thanks for the kind words.. I'm cautiously optimistic on the kickstarter!
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    Re: Lane Speed Plate--Think I Screwed Up

    Kent I’ve done that before. Pull them when they look fully developed. You’ll get a nice dense negative.

    The latitude of the plates will accommodate that much overexposure if you pull it in...
  40. Re: ChromaGraphica Double Dry Plate Holder Kickstarter - Friday 9 August 2019 Noon la

    Thanks fellas! Yeah the Kickstarter is kind of limiting as far as rewards go. Don’t worry if it’s successful then these will forever be widely available.

    Less common sizes will follow... if it’s...
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