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  1. Re: Which would be easier to build - 8x10 SLR or TLR?

    Fine fine. :) But a roof prism for it would be glorious
  2. Re: Which would be easier to build - 8x10 SLR or TLR?

    The cost of the 13” diagonal roof prism required to cover 8” x 10” would feed my teenagers McDonald’s cheeseburgers and fries every day for approximately 25 years.
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    Re: 6 1/2 x 8 1/2 cameras?

    You read the length measurement wrong. I’m showing the bottom of the holder, so length from rib to end is 232mm. What you thought is the rib is actually a spring-loaded wood strip inside the holder...
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    Re: 6 1/2 x 8 1/2 cameras?

    What you need are antique Premo Camera plate holders, with a film sheath adapter to shoot film. I can spare one to get you started, though I don’t think I have an insert to load film in it.
    ...
  5. Re: turner-reich 12" convertable antastigmat fungus removal

    The “flower” looks like a speck of dust was trapped in the balsam layer when first cemented, causing separation over time. Balsam separation and oxidation at the edge.
  6. Re: turner-reich 12" convertable antastigmat fungus removal

    Knowing that lens it’s likely balsam. They almost universally suffer from it. If you post a good picture I can tell you pretty quick.
  7. Re: turner-reich 12" convertable antastigmat fungus removal

    Absolutely not! That is not a threaded retaining ring at all. The “threads” are stray light reducing baffle cuts. The barrel is one solid piece of brass.

    An internal centering ring sits...
  8. Re: turner-reich 12" convertable antastigmat fungus removal

    Turner Reich Anastigmats are 10 elements in 2 groups. Kind of like a Dagor, but two additional pieces of glass bonded on to get around the Dagor design patent and still provide similar level of...
  9. Re: What is the Most Difficult Large Format Photography

    LF DSO or planetary astrophotography is ludicrously impossible enough that — with no exceptions I can think of — only large, professional observatories could accomplish it.
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    Re: orthochromatic film?

    I would use them professionally without question, if they had what I needed. They often don’t (as you may guess), so other sources of a wider variety of stock and custom windows/filters are Rainbow...
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    Re: orthochromatic film?

    TBH if I wanted to accurately replicate ortho look with panchromatic film, I wouldn’t limit myself to photo filters. I would look somewhere like Edmund Optics or Thorlabs which has a wider...
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    Re: orthochromatic film?

    Of course, if you want the look of plates, then you can just shoot plates.
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    Re: orthochromatic film?

    Doremus, I think what you’re missing, and perhaps what Jim has in mind, is that the response of classic Orthochromatic film continues down in to the ultraviolet. Modern panchromatic film has been...
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    Re: Reusing Film and Glass Plate

    Hey Randy,

    If you reuse it yourself, you can run it through the dishwasher at the toughest setting to clean. If you process C-41, run the plates/film through the bleach or blix to remove the...
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    Re: 6 1/2 x 8 1/2 cameras?

    tdicorcia, what width WP holder does your camera back require? If you measure, I can check my collection which has a variety of different widths.
  16. Re: Equivalent of Massive Dev Chart for Paper Developers ?

    I followed the recommendations in the boxes of paper until I realized they all say about 1-2 minutes in whatever developer. So now I just develop for 1-2 minutes (specific time depending on how...
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    Re: 6 1/2 x 8 1/2 cameras?

    Whole plate is my favorite format, so whole plate format dry plates will always be available. I’ve been bugging Steve Lloyd at Chroma Camera to produce a WP format camera .. I think it would garner...
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    Re: Lens Cleaner

    Not IMO, but the old Navy optician I used to work with preferred Dawn. I just cleaned a telescope primary mirror last weekend with 15 years of accumulated pollen, dust, etc from being regularly...
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    Re: Lens Cleaner

    Anything will abrade a glass surface if you apply pressure. The key is not to apply pressure, and itís a technique to learn. Kimwipes are almost universally used in shops when needed, as they are a...
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    Re: Kodak Dry Plates

    Drew Iíd suggest starting at ISO 12 and bracket +/- 1 stop as initial test. Since theyíre ortho you can develop them under a safelight...donít pull them until they look too dark in the developing...
  21. Re: Please help ID this 4 x 5 Holder/Adapter

    Definitely DeJur...I own one and have a sst of these for a bunch of different sized negatives. It’s a two-piece holder, which allows me to make enlargements from my dry plates since it accommodates...
  22. Re: What kind of lens bends an image without distortion?

    They do if you mount it at the end of a stick, or “precision aligned opto-mechanical structure” as it’s called in engineering terms.

    Btw assumptions and preconceived notions are the enemy of...
  23. Re: What kind of lens bends an image without distortion?

    A scanning mirror (adjustable orientation first surface mirror) is the simplest optical device to accomplish this. Since you are forming an image with a camera, the negative or digital image can be...
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    Re: Lens Design for Special Purposes

    You are essentially setting up a projector for a closer screen. Think overhead projector, slide projector, etc.

    You just need to readjust distance of your lens from the source (commonly called...
  25. Re: 8x10 Photography Compared to 4x5 Photography?

    8x10 is nice to shoot for contact prints, and the subjects for portraits I’ve shot at 8x10 seem to enjoy the experience better. Since I typically shoot dry plates I made, cost doesn’t factor in too...
  26. Re: Is it possible to practice the art of "seeing"?

    Yes, always. I’ve envisioned far more photographs than I’ve taken.
  27. Re: Lane Dry Plates: What is a practical ISO rating?

    If it’s from the same box then I’d check for problems elsewhere: Lens settings, developer exhaustion, etc. The plates are very consistent. Metering thru the filter would address UV variations. ...
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    Re: Photographing stars, 4x5

    That didn’t use any filter. That was a hand-coated dry plate.
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    Re: Photographing stars, 4x5

    konakoa, if you can’t find a new mount with a polar scope, then you didn’t do an internet search. All the equatorial mounts on the market above “department store” level include them. Software...
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    Re: Photographing stars, 4x5

    OP, check out the Cloudy Nights forum for info on other gear that you’ll need to make it happen, aside from the camera itself.


    You’re gonna love that EQ6, Corran

    213807



    This is Provia...
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    Re: SP-445 sticker / glue removal

    Called Kerosene in the US
  32. Re: Lane Dry Plates: What is a practical ISO rating?

    Sounds about right. The drop in speed indoors didn’t start getting addressed until the mid 20th C and even modern films lose a stop indoors. Of course the dry plates don’t take advantage of those...
  33. Re: Lane Dry Plates: What is a practical ISO rating?

    No that’s for the ASA 2 plates.

    Blue 47 filter blocks (approximately) the wavelengths the emulsion doesn’t see, but also chops down the throughput in the wavelengths the emulsion does see, so...
  34. Re: Lane Dry Plates: What is a practical ISO rating?

    If you experiment with different developers, you can develop by inspection under safelight. Donít pull the plate until it looks *too* dark under safelight.

    Iíve had some luck with a blue 47...
  35. Re: Making J Lane Positive Plates? (Famous Format Monobath?)

    That’s awesome. I haven’t been out there on travel close enough to stop in, but that’s cool.

    Yes, basically... with commercialization and competition, developments and improvements accelerated...
  36. Re: Making J Lane Positive Plates? (Famous Format Monobath?)

    Wall laments in his book on emulsion-making the commercialization of dry plates and the end of the era of amateur dry plate makers freely exchanging information. R&D moved behind closed doors with...
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    Re: Pet Pictures, Any Format.

    Georgie

    213475

    213476
  38. Re: Making J Lane Positive Plates? (Famous Format Monobath?)

    Yeah I’m not necessarily a monobath fan, but that’s just how these developers came together as the easiest way to throw ammonia into the mix.
  39. Re: Making J Lane Positive Plates? (Famous Format Monobath?)

    John I don’t know if you’re on facebook, but if so this is an ongoing active topic of conversation in Dry Plate Photographers group.

    If you had any thoughts, Lee Lira would love to hear...
  40. Re: ULF (and other sizes) Negative Sleeves In Stock at Climax Photo

    Just ordered some whole plate sleeves. Thanks for the heads-up.

    By the way, Priority Shipping is currently the cheapest way to ship parcels, at least for small businesses. 1st Class parcel post...
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