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  1. Re: Shooting Ilford Delta and developed as iso 400

    But you won't gain a 1 stop real speed increase...
  2. Re: Shooting Ilford Delta and developed as iso 400

    Wrong film ? Why ?

    D100 is excellent, don't complain because my dry plates are ISO 6 :)


    Use a longer exposure or an strobe, or be creative by finding unconventional illumination sources. ...
  3. Re: Shooting Ilford Delta and developed as iso 400

    You can't expose D100 at ISO 400, D100 won't deliver that ISO speed, you may shot it EI 400 with a 2 stops loss of shadow detail, at least you will loss 1.5 stops in the shadows if you are able to...
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    Re: Finding f-stops for remounted lens

    Some Nikon models may have shims, I use a Nikon W210 than has one, and a W360 has 3 shims. Also Nikon SW 90mm f/8 reportedly often has shims...
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    Re: Finding f-stops for remounted lens

    There are lenses that include shims and others don't. For example Fujinons don't include shims, it would be rare.


    Shims are a bit a mess, but some designs do include shimming in the product...
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    Re: Finding f-stops for remounted lens

    Hello Chauncey,

    Time ago I asked that question to Sammuel Bigler, from his kind and extensive answer, simplified for the image center of the image circle:

    (lux in focal plane) = R . (incident...
  7. Re: Disinfecting Film, Cameras and other Photographic Equipment from Viruses

    Sars-CoV-2 virus survives for longer on cardboard – up to 24 hours – and up to 2-3 days on plastic and stainless-steel surfaces.


    > The internal content of the parcel has not been contaminated...
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    Re: Finding f-stops for remounted lens

    Of course, coatings changed that game, mainly after WWII. Single coated have a little loss, and a multicoated lenses require a lot of gropus to notice a loss




    Yes... 3 groups are 6 uncoated...
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    Re: Finding f-stops for remounted lens

    The great thing of metering in that way is that we don't even need an aperture scale to have perfect exposures...
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    Re: Finding f-stops for remounted lens

    One thing else, with the transmission way you have to take the reading in the center of the image circle, to avoid fall-off influence in the reading.

    Regards
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    Re: IR 760 filter - rating film speed

    Tom, the M8 has an IR/UV blocking filter, very thin, it is less effective in the deep reds that usual and a IR/UV blocking filter on lens may be suitable in certain conditions, but think that if the...
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    Re: Finding f-stops for remounted lens

    If you use a meter (depending on the particular model) then you may spect a 1/3 stop precision when matching the apertures of the patron lens with the serviced lens, instead with the Luxometer you...
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    Re: Finding f-stops for remounted lens

    Jim, let me tell the way I used several times to calibrate apertures, as I rescued many of my lenses from trash I ended swapping several shutters, also I upgrades several lenses by purchasing the...
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    Re: Mixing Paper dev help needed

    I agree, beyond colder-warmer tone... I see a very limited impact of the paper developer choice in the image control, as we usually develop to completion. Many other factor have a deep impact in the...
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    Re: Mixing Paper dev help needed

    It dissolves better in mild alkali, if you add it in the order stated in the formula then the soup is alkaline by then.

    For darkroom mixing you may find suitable having a 0.001gr scale, this is...
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    Re: Still life - DOF problem

    Use this DOF calculator, it makes a good calculation of the theoric circle of confusion with different settings. Using it a bit you will get a clear idea on how "Focus management" is optimized.
    ...
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    Re: Mixing Paper dev help needed

    Glycin is an orphan chemical with no other "industrial" photo production known beyond Photographer's Formulary, CAS number is 122-87-2 , it is also made in very expensive reagent grade by Merk /...
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    Re: Mixing Paper dev help needed

    Try to stir and not shaking (like dry martini, 007) to not mix air in, this may have a relative importance but better in the Bond's way.

    If you are to mix often then a magnetic stirrer is quite...
  19. Thread: Spot meter

    by Pere Casals
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    Re: Spot meter

    > Use a camera with a reliable photometer (like nikon F-65) and see what photometer matches.

    > Buy a $ 10 yo $20 cheap Luxmeter, search:...
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    Re: Another digital versus analog showdown

    Image quality is very expensive in MPix terms, probably the IQ4 yield is well under 100MPix effective, simply because the available lenses won't do more in that small sensor surface.


    What is LOL...
  21. Re: Epson V850 work-around for scanning 5x7 negatives.

    My pleasure. Feel free to also contact me by PM if you have any issue in the future.

    Remember (case you don't do it): to always save files in TIFF 16 bits/channel, try to get all the histogram...
  22. Thread: My mistake

    by Pere Casals
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    Re: My mistake

    Yeah !
  23. Thread: My mistake

    by Pere Casals
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    Re: My mistake

    Most important, don't make the mistake to look through a 8x10" camera, it is addictive, don't make that mistake. See here min 0:40 what can happen, https://www.youtube.com/watch?v=V40Mz0mVotg
    ...
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    Re: Arista EDU Ultra 100 vs 200?

    For Foma 100, see the curve, the -2 vertical line is where the meter aims, and -1 vertical line is +3 stops overexposure, using ISO speed that is lower than the BOX speed in this case (60, 80?)
    ...
  25. Re: Epson V850 work-around for scanning 5x7 negatives.

    I think it is not the scanner, but flaws in your film.

    Scan it rotated 90 and see if the lines also rotate.


    ________

    You have a lot of scratches and dust.

    Handle film with care...
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    Re: Arista EDU Ultra 100 vs 200?

    This film is perfect for LF, very cheap but totally capable, it can be recommended. Personally I found no QC flaws in the sheets I've processed.


    > As Koraks says Speed is lower than the box...
  27. Re: Epson V850 work-around for scanning 5x7 negatives.

    Please post the flawed image and I'll may be able tell you.

    Download last software/driver versions, I had several issues (lines) with software that came with the unit. Some incompatible...
  28. Re: "By Request of Mark Osterman in Memorium of Ron Mowrey"

    I'd encurage to everyone to post a message in his tribute wall: https://bartolomeo.com/tribute/details/12929/Rowland-Mowrey/condolences.html#content-start

    It would be nice his family knows how...
  29. Re: "By Request of Mark Osterman in Memorium of Ron Mowrey"

    https://www.youtube.com/watch?v=JvXdvLt_kz4&feature=emb_logo
  30. "By Request of Mark Osterman in Memorium of Ron Mowrey"

    Sad news

    https://www.photrio.com/forum/threads/by-request-of-mark-osterman-in-memorium-of-ron-mowrey.173255/
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    Re: Epson V700 High Resolution lens

    Presently V850 sensor is not limiting resolution performance, it sports an amazingly big sensor with 40k rgb pix in two rows, when Creo, a Cezane or a Hasselblad relied in 8k sensors plus optic...
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    Re: Epson V700 High Resolution lens

    And the V800/V850 it's the same than the 2006' V700, with only a LED illumination update, so the product is now 14 years old and still sold. Only a solid electronic product resists 14 years mostly...
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    Re: Epson V700 High Resolution lens

    ok, but be aware that the Vuescan manual selection of the lens may end in a pitfall, when the higher res lens is selected then focus is at the holder's height, so a holder is required to have the...
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    Re: Epson V700 High Resolution lens

    In this way Vuescan avoids having to detect the holder to automaticly swap the lens. This suggests that decision to swap the lens is made by Epson Scan and firmware simply obeys.
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    Re: Epson V700 High Resolution lens

    A lens holder has the two lenses, the holder is displaced laterally to interchange the lenes:

    200488

    See page 24 in the Service manual, it can be downloaded here:

    ...
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    Re: Darkroom in construction, finishing

    Yes... Joe Bonamassa playing a tribute to BB King. https://www.youtube.com/watch?v=CD1CYMPNSis


    Bonamassa (then some 12 years old) opened for B.B. King at approximately 20 shows in 1989. If the...
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    Re: Darkroom in construction, finishing

    Yes... something like this: https://www.youtube.com/watch?v=d-3IBi5tC08

    ___

    A tour https://www.youtube.com/watch?v=DKF0Upt1vOg
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    Re: Darkroom in construction, finishing

    You are right, better starting without complications, I'll do that. I'll glue a little dam with silicone... little chem may be necessary to process a large print in the sink, I'd use a 700mm wide ...
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    Re: Darkroom in construction, finishing

    Thanks ! Next challenge is crafting nice big prints from 5x7, for the moment up to the size the Drytec allows. The projection of the negative looks atonishing in crazy fine detail... That Drytec...
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    Re: LVT questions

    Thanks for the feedback

    Great job!
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