Search:

Type: Posts; User: mmerig; Keyword(s):

Page 1 of 6 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    6,552
    Views
    1,599,305

    Re: MF (6x4.5,6x6,6x7,6x9,6x12) B&W film images sharing

    223732

    Here is one from a few days ago. I wanted to finish-up a roll, so took this one on a ski traverse (120-format Ilford Ortho Plus in a 2 by 3 Crown Graphic, 90-mm lens, no filter. D76, Ilford...
  2. Re: Whar are the implications of using a thicker ground glass than is standard?

    You could mount a plate holder with a plate (or film holder with film) in it, measure the distance to its lens-side surface from a definite edge on the front standard, then see if the distance to the...
  3. Thread: Omega D2

    by mmerig
    Replies
    3
    Views
    476

    Re: Omega D2

    i have a D2, and can make measurements for you if you can't get them from that website.
  4. Replies
    12
    Views
    891

    Re: Problems with sharpness

    Another approach is to measure the distance from something on the front standard to the surface of an installed film holder with a sheet of film in in (or something the same thickness as film). Then...
  5. Replies
    18
    Views
    1,082

    Re: End grain glue joints versus side grain

    Is there a publication on this discovery?
  6. Re: 1/3 of Lassen Volcanic NP now burnt to ashes (yes, one-third)

    Drew makes a good point about the range of severity within the fire perimeter. Once the fires are out, severity maps are usually made, but during a fire, there is not much time for that, and anyway,...
  7. Re: Do you use a test strip or a test sheet when you print in darkroom?

    For test strips, I use a sheet of 5 by 7 paper, with (usually) 1/3 stop time increments between the seven separate strips of the same portion of the negative. But I usually use an RH Designs Analyzer...
  8. Re: Images shot with Orthochromatic / Ortho Film / Litho

    Thanks for the history, Jim. I am re-taking many historic landscape scenes, and use Ilford Ortho Plus and Ilford FP4 plus (and Fuji Provia) for each scene, unless I know for sure what film they used....
  9. Replies
    6,552
    Views
    1,599,305

    Re: MF (6x4.5,6x6,6x7,6x9,6x12) B&W film images sharing

    Did you use infra-red film? The grass looks so light. Anyway, it's a beautiful, interesting picture, as always.
  10. Replies
    19
    Views
    2,201

    Re: Looking for feedback on images...

    The images are nice, especially the first one - I like the cropped version across the top better than the original. Something in-between would be even better. The composition on the other three is...
  11. Replies
    65
    Views
    7,176

    Re: What's your Go To LF body & lens?

    Meridian 45B, with a Kodak Wide Field Ektar 135 mm. The Meridian is the only LF camera I have ever owned, and have no plans on changing.
  12. Replies
    13
    Views
    1,951

    Re: Mac mini M1 Thoughts

    If simple PS stuff is the heaviest lift, why do you need a new computer? I have a Windows-based tower, a used server with 2 Xeon chips I bought several years ago, I think circa 2005 for about $125....
  13. Re: What small lightweight lens for 4x5 backpacking?

    Maybe I do -- the tripod I use has "Sharman Camera Works San Francisco" on the top plate, where the camera or head would mount. It is 33" long unextended, and weighs about 3.5 pounds. In a pinch, it...
  14. Replies
    3
    Views
    873

    Re: RH Designs Zone Master II With MG V Paper

    I just switched from MGIV to MGV, and I use an RH Designs Analyser Pro and calibrated it for the new paper. I also re-calibrated it for the MGIV paper, and my values were different than what was...
  15. Replies
    8
    Views
    626

    Re: Lenses to fit inside a Busch Pressman

    Please ignore my reference to the 2 by 3 Pressman (Model C). I mis-read the original post.
  16. Replies
    8
    Views
    626

    Re: Lenses to fit inside a Busch Pressman

    Lots of info on Wollensaks here:

    https://alphaxbetax.com/wollensak-lens-and-shutter-compendium/

    I have a 2 by 3 Bush Pressman -- there is not much room for lenses, either across the lens board...
  17. Re: What small lightweight lens for 4x5 backpacking?

    Lens choice can shave a few ounces off the total weight of the pack, but its negligible compared to other choices. In my experience, it's the number of film holders carried that makes the most...
  18. Replies
    16
    Views
    2,177

    Re: Please help with this image

    The black strip on top could be a light leak, but the picture-side of the strip is quite distinct, so maybe not. To eliminate the possibility, put a sheet of photo paper in your holder and go through...
  19. Re: What small lightweight lens for 4x5 backpacking?

    The Kodak Wide Field Ektars are nice, for example the 135 mm, or 100 mm (no movements). For some reason, old Kodak lenses are expensive these days.
  20. Replies
    6,552
    Views
    1,599,305

    Re: MF (6x4.5,6x6,6x7,6x9,6x12) B&W film images sharing

    I am surprised that a Super Angulon can fit in a 2 by 3 Graphic. Very nice images, by the way. Was there a lot of smoke haze? The sky looks light given the red filter.
  21. Replies
    324
    Views
    77,902

    Re: The Setup and the Shot

    Here is one from this summer, on a ridge leading up to Cream Puff Peak. This peak is on the south edge of the Gros Ventre Mtns. in NW Wyoming. The scene is a re-take of an historic image by Eliot...
  22. Re: Is there such as thing as a modern, fast, compact 360 for 8x10?

    Thanks Vaughn, for tossing that redwood photo in -- very, very nice.
  23. Replies
    3
    Views
    838

    Re: Need Empty 4x5 Film Boxes

    I have many. Please PM me your address and I will send them to you.
  24. Re: ...photography and its relationship to state surveillance.

    Drew makes a good point -- I agree that Paglen is pushing a little bit too hard on the surveillance aspect. But he is not way out there. A good source for the history of these surveys is William H....
  25. Re: Krakatoa explodes The most powerful volcanic eruption in recorded history

    Do you really think people are gullible enough to believe that story? It defies the laws of projectile physics and common sense, unless the pumpkin piece floated there somehow like the tigers and...
  26. Replies
    33
    Views
    2,789

    Re: Leaf Shutter High Speed

    There seems to be a contradiction here. Although "there is lots of activity going on" with a 50% efficient shutter, such activity leads to less exposure than if the shutter was 100% efficient, as you...
  27. Replies
    33
    Views
    2,789

    Re: Leaf Shutter High Speed

    Thanks, I did not realize you were referring to the fastest shutter speeds only.

    Maybe I am missing something, but I wonder why manufacturers don't publish shutter efficiencies or the graphs...
  28. Replies
    33
    Views
    2,789

    Re: Leaf Shutter High Speed

    Why would a perfect measurement be necessarily triangular? This could be so for very fast shutter speeds, but not for slower ones (say 1/30 s or slower), unless the blades opening and closing time is...
  29. Replies
    33
    Views
    2,789

    Re: Leaf Shutter High Speed

    I agree, the time difference is very small may probably wrong, but I am not sure why. It could easily be 2X the 0.0002 measure, as 10 KHz cycle is 0.0001 s.

    My measurements could be biased to the...
  30. Replies
    33
    Views
    2,789

    Re: Leaf Shutter High Speed

    In the shutter tester I built, I use a phototransistor (a Vishay BPW85B) and it detects pulsed light through the lens at 10K Hz. There is a dramatic difference in amplitude in the signal...
  31. Re: Does Anyone have any experience with the RH Designs Analyser Pro? Any thoughts on

    I use one regularly, and it saves me a lot of time. One project requires me to switch papers (RC to FB), and having calibration on both papers allows for a quick, accurate switch to FB paper. I...
  32. Re: How To Test The Shutter On a Lens Intended for Use on a Graflex

    For any shutter, especially a leaf shutter, there are DIY shutter testers. I made one that uses pulsed light at 10,000 Hz from an LED that goes through the lens and hits a photo-transistor that...
  33. Replies
    3
    Views
    596

    Re: Meridian Model B 4x5

    The Meridian 45B serves me well. For lens boards, I cut 1/8" (0.125) aluminum flat stock to 4 by 4, then drill the appropriate hole with a hole saw on a drill. Some will say this is an extremely...
  34. Replies
    110
    Views
    12,086

    Re: Help me choose a camera to hike 2000+ miles

    After reading every post here, and after hiking hundreds of miles with a 4 by 5 in remote areas, my suggestion is DO NOT bring a 4 by 5 on the trip you are planning, given your objectives (stated...
  35. Replies
    11
    Views
    1,414

    Re: Aperture indicator not aligned

    This is not unusual. A given shutter can be used for different lenses, so the largest stop opening can exceed the lens diameter on the shorter-focal length, or smaller f-stop lenses. Most if not all...
  36. Replies
    11
    Views
    1,414

    Re: Aperture indicator not aligned

    Another simple test is to compare exposure readings through the ground glass using two different lenses (assuming you have another besides the one you just bought). Use a uniform target, like a wall,...
  37. Replies
    19
    Views
    2,397

    Re: slot canyon support

    +1
  38. Replies
    13
    Views
    2,555

    Re: Missing exposure equation

    The general equation in Excel is:

    =log(X,b)

    where X is the value to be logged, and b is the log's base

    in this case, X is the Exposure factor, b = 2 is the log's base

    The calculated...
  39. Replies
    6
    Views
    868

    Re: Practical Movements for 90mm 4x5

    Architectural work is the most demanding, and some rise and swing can be useful as well. Once the mechanism for a movement is included in the design, it seems like a reasonable amount of adjustment...
  40. Re: Your Best Photograph from the Previous Month - Critique and Discussion Encouraged

    Okay, I think I know what you did, except for "rise/fall". (which one? I guess rise).

    With such tall objects, it may have been impossible to have their tops sharp when using tilt (assuming...
Results 1 to 40 of 214
Page 1 of 6 1 2 3 4