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    Re: Chromira Print Color Degradation

    There has been a great deal of ongoing chromogenic dye research by the manufacturers; otherwise, the products wouldn't be steadily improving. But it's a very specialized field and competition is...
  2. Re: Planning Roadtrip for June in Middle/Western USA

    Gosh. It would take me two decades to shoot that much film. But it's a beautiful time of year both in the mountains and along the coast. Getting distinctly windy and foggy here on the coast, like a...
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    Re: Chromira Print Color Degradation

    Well, Bob ... If your prints are truly permanent, within fifty million years or so, that tree sap will have turned into amber, and the "fly in the ointment" will be a real insect fossil !
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    Re: Chromira Print Color Degradation

    Hmmm. It's quite interesting that someone has been working at Epson for the past 200 years to monitor all this, and that they waited 185 yrs before marketing the amazing product. Maybe they should be...
  5. Re: Depth-of-focus problem, enlarging lenses

    Circle of confusion? Why make it confusing by even going down that rabbit hole? It's easy enough just to make experimental test strips and see if the image sharpness is acceptable to you. You can...
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    Re: Filtering for a deep red filter

    A couple of time mine were in twenty-something degrees Fahrenheit, when I accidentally dropped the meter is snowmelt streams.
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    Re: Filtering for a deep red filter

    nitoplait - that odd advice has little or nothing to do with conventional filter factors, but about manipulating overall contrast through specific filter selection. Perhaps there was some...
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    Re: Warming filter for Lee 100 holder

    81C is pretty drastic, more equivalent to a KR3 (though more yellowish). Once in awhile I'll use an 81C to offset morning shade under deep blue skies at high altitude, but rarely for anything else....
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    Re: Chromira Print Color Degradation

    Well, it can take 15 to 20 years on display to even begin to assess realistic distinctions. Sometimes a print in storage, if improperly processed, will be affected sooner because of trapped...
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    Re: Filtering for a deep red filter

    I'd hear the bottles rattlin' on his patent medicine wagon from a mile away, and just call the sheriff and a lynch mob before he fully came back from the dead.
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    Re: Chromira Print Color Degradation

    What specific medium were they printed on? An RA4 chromogenic paper made by Kodak or Fuji perhaps? The Chromira printing method would have nothing to do with it - that's just a fancy laser exposure...
  12. Re: Planning Roadtrip for June in Middle/Western USA

    Corran, a "sweet campsite right outside the gates" of Yosemite ....???? You and six hundred other people still waiting for the resort to get snowplowed. There is an official FS campsite at the...
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    Re: Filtering for a deep red filter

    Oh, just fill an old top hat with some water and Zone VI modified Dektol, point your modified Zone VI meter that direction, look through the finder, and chant, It ain't workin', it ain't workin, the...
  14. Re: Planning Roadtrip for June in Middle/Western USA

    The official wording is "driving into OR THROUGH" the park after 6:00AM, somewhat ambiguous. So you might want to double-check that. That time of year I'm personally a lot more interested in shots up...
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    Re: Filtering for a deep red filter

    Takes some experience. Wind was relatively calm yesterday and I shot 3 4X5 sheets of TMY400 at a glassy estuary. Two directions with a 25red, another direction deep green filtration. Might sound...
  16. Re: Planning Roadtrip for June in Middle/Western USA

    Just be careful where you pull off on side roads around Mono Lake. It's awfully easy to get trapped in the loose pumice sand. And expect some nasty big mosquitoes at night anywhere near the lake. ...
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    Re: Filtering for a deep red filter

    Everything depends on the specifics. For example, what do you mean by deep red? 24A isn't as deep as a 25; 29 is deeper still, and some brands deeper than others. That variation could account for...
  18. Re: Traveling by Air In July: How should I handle LF Film?

    I certainly don't trust Fedex entirely. I've never had a problem with Airport Xrays concerning film; just left it in the carry-on and sent it through. No fog even on 400 speed film after multiple...
  19. Re: Depth-of-focus problem, enlarging lenses

    A better strategy is to make sure your neg is totally flat in a full glass carrier, that everything is properly leveled and aligned, and that you standardize on larger f-stops which have shallower...
  20. Re: The Wratten Mystery, or, What's My Factor?

    Tom - metering through filters doesn't work so well for two key reasons. First, the peak sensitivity of the meter is probably different from the film; second, pan films differ somewhat from one...
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    Re: float frames for alt prints?

    Hmm ... Sad to hear that. Once the enterprise shifted from the original bootmaker to the next generation, there were allegedly some issues. My pair has been wonderful, and still holding up great...
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    Re: float frames for alt prints?

    Felton? Been a long time since I lived in that area - over 50 yrs ago. Didn't know there were any bootmakers there - are you sure it ain't a bootlegger? My last pair of boots was made by Esatto in...
  23. Re: The Wratten Mystery, or, What's My Factor?

    The Wratten handbook gives transmission charts and percents at various wavelengths. For daylight 5500K or close to that, it's around 48% transmission for light blue no. 38; so a single stop of...
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    Re: float frames for alt prints?

    Creation Bear - Not hot enough here this time of year for beer; but I have my own compete framing facility, and have equipped and advised museum shops handling some of the best photo collections in...
  25. Re: How to secure Sinar Norma Case for shipping

    Beware of any ad paid for by a Chiropractor seeking new business.
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    Re: float frames for alt prints?

    In principle, one never has paper in direct contact with wood, or even with conventionally sealed wood. One needs to know what they are doing. Several good hints have already been provided in...
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    Re: Man Ray: Kiki de Montparnasse

    It's no secret that massive amounts of oligarch and dictator money via family members and cronies have gotten laundered in big East Coast art auctions and specialty fairs over the past decade or so....
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    Re: Man Ray: Kiki de Montparnasse

    With a pandemic, war, and famine raging on, it's nice to know certain people still have obscene amounts of money to toss around. And with the toilet paper shortages, it amazes me that nobody has...
  29. Re: 305 G-Claron As W.A. 11x14 Enlarger Lens?

    I've done some enlarging tests with G-Clarons. They're decent at that, but not fantastic. But at only about 4X that you're contemplating, it shouldn't matter except toward the corners. Depth of...
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    Re: Vacuum Frame Question

    Amazon and the like - you me the toy store? Unfortunately, good pumps aren't cheap, but might turn up quite reasonable on the used market under Graphics Supply and Industrial listings. You can get...
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    Re: E100 Color Problems

    Their quality control seems to be better than ever. I've carefully tested E100, and it's spot on 5500 K daylight color balanced just like they claim. That has long been Kodak's standard for official...
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    Re: Vacuum Frame Question

    I no longer use vacuum pumps, though I have them in storage. I do have several high quality domestic made oilless compressors from the same outfit that now makes those pumps only for industrial vac...
  33. Re: Getting Back To PMK - Want To Try Pre-Mixed But Is It Good?

    I've been working with pre-mixed Formulary A&B concentrates for a long time. No issue. The pyro solution itself can go rather brown if old and oxidized, so might be better in a glass bottle than the...
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    Re: Exposure compensation for small apertures

    Little exposure errors can add up fast. For color transparency usage, even a third of a stop might be objectionable if one is working on the edge of contrast limits.
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    Re: Vacuum Frame Question

    There were millions of them made for industrial line applications. The ones adapted for graphics applications were just a small percent.
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    Re: Vacuum Frame Question

    Quiet Oilless vac pumps have been around a long time.
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    Re: Vacuum Frame Question

    Remarkably little vac power is required if there is no leakage around the perimeter. Depends on the efficiency of the frame design. A more common problem is too much vac drawdown. Too powerful a...
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    Re: Which diameter filter

    Wow. That's quite a collection. I used the P67 system only briefly a couple or years in my late 20's, then loaned it all to my brother until his death. He had an eyesight problem due to a heart...
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    Re: Which diameter filter

    The later 55's took 77mm as I recall. I sold my 55/4 - it had a lot of illumination falloff, and now prefer the 75/4.5 as my only wide for the system - which is also nice because it shares the same...
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    Re: Which diameter filter

    That must be one helluva a telephoto. My 300's for the Pentax 6X7 need only 82mm; and that's a setup that needs even more solid support than my 8x10. Longer than that, and P67 "cannon barrel" tele...
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