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  1. Re: Trial with the new B's 4x5 Developing reel

    yes... but still we would waste a lot of developer in that way.

    Say that we use Xtol diluted 1:2, 6 sheets require 150ml stock, so 450ml of dilution, beyond that we are wasting developer.
  2. Re: Trial with the new B's 4x5 Developing reel

    Randy, yes, you are right... I've just seen it...

    In this case I'd perhaps add a ring (or two) in the tank, something like this:

    193280

    or perhaps the device can be inclinated.

    IMHO...
  3. Re: Trial with the new B's 4x5 Developing reel

    It's the counter, you need to level your thank and then you'll waste less chemicals. Perhaps you may reverse (flip) the tank position.
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    Re: Following Ilford's Lead, KODAK Response

    They are aware, they see how ilford is taking their LF customers, but they still prefer selling a lot less with higher profit per box, it is a good policy in the short term and a good general policy...
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    Re: Following Ilford's Lead, KODAK Response

    This is not the ilford's case, they serve 8x10" customers at similar per surface price than 120 format, and they even make custom ULF cuts once per year. Not a big business, I guess, but sure they...
  6. Re: Does any scanner have a 3 exposure HDR scan option?

    Interneg, I see no sharpness loss. ME is often used for very dark slides that are absorbing near all light and they can reheat, sometimes the film can move from thermal deformation specially (I...
  7. Re: Does any scanner have a 3 exposure HDR scan option?

    And they do !! from 3.1D to almost 3.4D

    193224

    https://www.silverfast.com/highlights/multi-exposure/es.html


    The 3.4D (of the V700 with multiexposure) is way better than what the LS-9000...
  8. Re: Does any scanner have a 3 exposure HDR scan option?

    Just the same I found.
  9. Re: Does any scanner have a 3 exposure HDR scan option?

    V700 does not include Multi-Exposure in the bundled software, so obviously you could see no gain with multi-pass.





    The V700 and V750 are true multi-exposure able (extrange that you are not...
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    Re: Following Ilford's Lead, KODAK Response

    Kodak discontinued Ektachrome, later they manufactured it again. Fuji discontinued all Acros, later they are to manufacture it again... Instead promoting film usage they spend money in closing and...
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    Re: Following Ilford's Lead, KODAK Response

    IMHO sheets and rolls have very similar ex-factory costs, emulsion and coating work to make master rolls is the same, what varies is the base material/thickness and the packaging which has a...
  12. Re: Does any scanner have a 3 exposure HDR scan option?

    It has to be a flawed test with the stouffer... was the epson using Multi-Exposure ? was exposure well adjusted for the job?

    If DSLR is compared to an V700 auto scan made with EpsonScan then...
  13. Re: Does any scanner have a 3 exposure HDR scan option?

    Many scanners support the multi-exposure feature (google: silverfast multi-exposure) that takes two images and delivers an optimal blend, you have to save 16 bits per channel in TIFF format (not jpg...
  14. Re: Behind the Film - Inside the ILFORD factory

    Yes, a very nice video !!!!
  15. Re: Development compensation for Foma 200 reciprocity?

    Also IMHO recommendations in datasheets are a bit conservative, and this is not bad for the starting point.

    With LIRF compensation tables we have several problems. First metering style has a lot...
  16. Re: Amber Plexiglas for Wet Plate Dork Box?

    IMHO the question is in what conditions it is safe, what exposure time and what room light intensity.


    I found a similar situation with DIY emulsion (blue only sensitive) for dry plates, I was...
  17. Re: Development compensation for Foma 200 reciprocity?

    My pleasure
  18. Re: Development compensation for Foma 200 reciprocity?

    See development times N, N-1 for the percentages.





    Still I've a lot to learn regarding night photography, but let me explain how I face that situation.

    First you may need not only a...
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    Re: Bergger PMK Roto Additive

    I don't know what antioxidant it is, but the typical antioxidant for PMK (etc) is Ascorbic Acid.

    Basicly Rollo Pyro is PMK with antioxidant: Ascorbic.

    The ascorbic acid also works as a...
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    Re: spherical aberration solved?

    Yes, of course... this is what it is, an analytic way to calculate asph singlets that are free fom sph aberration, so this is math.
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    Re: spherical aberration solved?

    What is "better" in the photography art?
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    Re: Printing TMAX 100 W/UV bulb?

    Well, 400nm violet is in practice as energetic as 401nm UV. Limit is a bit artificial.
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    Re: spherical aberration solved?

    Mark, yes but by wwii that required several elements, now it is done with a bi asph singlet, analytically.
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    Re: spherical aberration solved?

    IMHO spheric aberration cannot be considered as the single factor, because we also want field flatness, low distortion, to correct primary and secondary chromatic aberrations, low fall-off... we also...
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    Re: Printing TMAX 100 W/UV bulb?

    Many halogen bulbs do not throw UV beacuse they are made with UV absorbing glass...
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    Re: Printing TMAX 100 W/UV bulb?

    I've just checked it with just a 4x5 TMX sheet, emulsion does not dissolve (BVSME) as you predicted, but after a few seconds in very hot water emulsion is easily removed even with fingers.

    193161...
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    Re: Printing TMAX 100 W/UV bulb?

    It's way easier. Just place a roll film end in a hot enough water bath and the gelatin will dissolve completely, leaving the film base perfectly clean, so its UV opacity of can be measured. We can...
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    Re: Printing TMAX 100 W/UV bulb?

    If Ctein's theory is right, (Post Exposure, page 145, http://ctein.com/PostExposure2ndIllustrated.pdf) then in certain conditions UV presence may led to a loss of sharpness in the print, if the...
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    Re: Commercial Ektar 12" coverage?

    Another choice is to get the 14" commercial, Yousuf Karsh used it extensively por 8x10" portraiture, his favourite lens, for good reasons I guess.
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    Re: Printing TMAX 100 W/UV bulb?

    Yes... in carbon and Pt/Pd UV printing exposure has to be 8 times longer because TMX blocks UV by 3 stops aprox. It has been said that the UV absorbing dye is in the film base plastic. Many...
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    Re: Developing Issue

    We may operate the scanner and negative handling in a dust free room, using an cheap HEPA air purifier solves it, I use this one:

    Honeywell HAP-16200E

    193142
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    Re: Developing Issue

    +1,

    Yes, newton rings (https://en.wikipedia.org/wiki/Newton%27s_rings). I'd add that if you scan with the negative on glass then you should place the emulsion side facing the glass, and newton...
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    Re: Printing TMAX 100 W/UV bulb?

    In theory UV presence produces a change in the contrast grade as it works like blue, many papers are highly UV sensitive. As TMX base blocks UV you should notice less that effect.

    Also UV reaching...
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    Re: Sinar "Norma" or Sinar "Standard"?

    Daniel this is an amazing setup !!!!

    5x7" is an amazing format, (IMHO the best LF format) and the Symmar is a formidable lens. The 620 conversion is a fantastic choice: It is a relatively...
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    Re: Proof to Print: the contrast difference

    :) :) Interneg...

    The only thing I say is that film resolution (and MTF graph) depends a lot on contrast and exposure. (not like lenses)

    193067

    193068

    You were negating that, Post 90:
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    Re: Proof to Print: the contrast difference

    Interneg, this is true for rating lenses, but not for rating film. For film several tests are made at different contrasts/exposures, delivering different graphs. The ISO 6328:2000 norm explains it,...
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    Re: Proof to Print: the contrast difference

    Interneg, what I was pointing is that film modulation transfer is extinguished (0% MTF) at 200 or at 50 lp/mm depending on test contrast, if you remember we were debating that MTF graphs of different...
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    Re: build a portable 8x10 camera8x10

    Hello Imanol,

    In this web site you have a lot of information, plans, faqs, etc

    https://jongrepstad.com/building-a-large-format-camera/camera-builders/

    Remember that Ground Glass to film...
  39. Re: Recommendations: Small 135mm with good coverage for 4x5 portraits?

    There is always a debate, but given the usage you plan... I'd consider bokeh as a main factor in the decision, of course bokeh is a "YMMV", but if you prefer an smooth background to isolate subject...
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    Re: Proof to Print: the contrast difference

    Interneg, while this is a cleaver reasoning it cannot be applied. This is not only optics, for film you have the non linear response of photochemistry in the middle.

    IIRC TMax films have two...
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