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  1. Replies

    Re: New light box from Home Depot

    There is no way any harmful UV would get through that white plastic diffuser.

    To make UV emitting or UV transmissive optics, one often needs to use special glass types that transmit well in the...
  2. Replies

    Re: Out of Stop, switch to water?

    Stop is the least expensive of the chemicals because it is diluted so much and keeps well. It's basically just acetic acid (pus a dye for indicator stop).

    People do forgo stop - if you know what...
  3. Re: B&W negative looks normal when projected onto mirror.

    At some angles and against some backgrounds - I think you need a dark background and light illuminating the negative - you wind up seeing a combination of reflected light off the negative, and...
  4. Re: Comparing the Toyo 45CF and the Super Graphic

    Sakai Machine Tool, Inc, (site in Japanese). The early Toyo Field is marked "Sakai Special." If you search for "Toyo lathe" or "Sakai lathe" you can find some examples of...
  5. Replies

    Re: Describe a style for me

    What I see in Ken Lee's plants and in some of Maria Isabel Leblanc's images, (including for example the first image of the cabbages, and the images of the tented rows of plants with hills in the...
  6. Re: Help! I can't open my new B&W King 4x5 tank...

    Try to blow air in through the open cap? (using a vacuum in reverse or a foot pump, with a hose adapted to the cap opening) I think there is a Jobo pump for opening their tanks, when hard to break...
  7. Re: Three Views of Manzanar: Ansel Adams, Dorothea Lange and Toyo Miyatake

    Some great comments in this thread. Many (all?) of you may know that a book titled "Manzanar" was published in the late 80s. It has a large selection of photographs by Ansel Adams, an essay by John...
  8. Re: The greatest fashion photographer you’ve never heard of

    Aha! I went to the Leopold Museum in Vienna a couple summers ago and happened to see this exhibition there. It's really good. I was a little familiar with the artistic ferment of early 20th century...
  9. Re: 4x5 Kodak HSI: any special considerations?

    I never used Kodak HS IR in 4x5, only in 35mm. Even in 35mm, you are supposed to open the film can and load the camera in total darkness. Following the principle of having two layers of prevention,...
  10. Re: Me, my inexperienced butt, and the backcountry

    Try to find a Bogen or Manfrotto tripod with a pan head (not a video head) on the used market in decent condition (eg Bogen 3011 or 3021 plus 3047 pan head, or the equivalent Manfrotto numbers). A...
  11. Replies

    Re: Mountain Lion near Santa Cruz

    Here is a bobcat that ran across the road in front of me a few miles up the Mt. Hopkins Road south of Tucson. She or he stopped in the bushes and I was able to get out and take a picture. (Sorry, not...
  12. Replies

    Re: Mountain Lion near Santa Cruz

    60 lb is pretty small for a mountain lion, it could have been juvenile, sick, or a runt as Drew says. Typically a healthy adult will avoid people and not attack them. State wildlife departments...
  13. Replies

    Re: Mountain Lion near Santa Cruz

    The park is in the Santa Cruz range, but not really that close to Santa Cruz city. Mountain lion kills (of deer, not photographers) are relatively common on the UC Santa Cruz campus, and there are...
  14. Re: Caltar II-N 210mm f5.6 aperture scale help

    f-number is focal length divided by apparent diameter of the aperture as viewed from the front. The apparent diameter can be different from the physical diameter of the aperture. Sometimes the front...
  15. Re: Check Your Ground Glass ~ Film Holders for Registration! Simple, Important and F

    The formula on the page was for the dispersion, giving the refractive index change as a function of light wavelength. That's something a lens designer needs to worry about, but...
  16. Re: Check Your Ground Glass ~ Film Holders for Registration! Simple, Important and F

    The converging beam from the lens to the focal plane converges less strongly as it travels through the glass. That means it forms an image on the back side of the glass, that is slightly farther away...
  17. Replies

    Re: Ansel Adam's books...what version??

    There was an "old" or original Ansel Adams photography series published in the 1940s or 50s. It was 5 books instead of 3, and the physical size of the books was smaller. It's a historical piece at...
  18. Re: 8x10 Tripod that Won't Break the Bank, But May Break my Back

    Manfrotto still makes big tripods, B&H has them in the pro video section.

    I have a 3021, it's perfectly serviceable, but it isn't super light. The leg set is almost 6 pounds. Weigh your mondo...
  19. Re: Is it worth it to use the Speed Graphic handheld from time to time?

    Thanks for that!

    Also, with reference to the Canadian Lieutenant photo posted above, it is proven that your pictures will be sharper if you can pull off wearing a snappy beret, and even if they...
  20. Replies

    Re: Close up lens, how do they work?

    On a fixed mount camera (like a 35mm SLR type camera), if you put a close-up lens in front of a normal lens, you can focus close-up but not at infinity.

    On a view camera, if you put a closeup lens...
  21. Replies

    Re: Post your signs Valley, California, 2001 by reddesert64, on Flickr
  22. Replies

    Re: Close up lens, how do they work?

    The close up lens adds additional power to the primary lens. You can think of this as making the combined focal length shorter - shorter focal length lenses are more strongly curved and bend light...
  23. Re: (Micro-Mark Mega Mini R8) Milling machine for fabricating parts... advice needed.

    I learned to use machine tools in a college lab class; that was a long while ago and I couldn't operate one now without a substantial refresher. Maybe youtube videos help. Nevertheless, my two cents...
  24. Re: Please Help Identify "Type Y" Caltar Lens

    I recently found one of those in the 240/6.8 form. As you found it is generally thought to be a Rodenstock Ysarex, and Ysarex appears to have been Rodenstock's trade name for Tessar-like lenses. The...
  25. Re: Need Advice Re : First ever visit to South Rim of GrandCanyon in January

    Hermit's rest road info:, says "improved in 2008."

    The Grand Canyon is great in winter, it will be cold at the rim, but you're from Toronto....
  26. Re: Suggestions for a low cost incident light meter

    The Gossen Luna Pro Digital is a nice, compact, light meter that can do incident. It uses 1xAA which is really convenient! The current version is called Sixtomat F2 and costs about $190 new, which is...
  27. Re: Travelers: New X-ray machines WILL ruin your film

    Lately, I have been getting flagged a lot when I carry food through a (US, TSA) security checkpoint. I often carry something like sandwiches or fruit through the checkpoint, and recently if it's in...
  28. Replies

    Re: Months-away tide prediction site or app?

    Go to
    Search for your place name, for example the Santa Cruz CA station is...
  29. Replies

    Re: FB Enlarging paper availability at B&H

    I haven't been there in years (I live on the other side of the country), but I'm sure there's something to look at. Although the art gallery scene in Manhattan has changed a lot, there would surely...
  30. Re: Travelers: New X-ray machines WILL ruin your film

    There's not been any evidence posted that it affects light meters. That was brought up in post #19, but the poster did not offer any reason for being concerned that the X-ray machine would affect...
  31. Replies

    Re: Lens board too thin

    What kind of lens board / how thick? Are you sure there is no anti-rotation pin sticking out of the back of the shutter? A Copal shutter will often fit on a fairly thin lens board, but sometimes...
  32. Replies

    Re: batteries for Calcu Light meter

    Search better or in a more directed fashion.
  33. Replies

    Re: Focus Shift For Infra-Red

    You're burning film right now without knowing the focus shift.

    You need to set up a static subject - try a yardstick (meter stick if not US) laid out at say a 45 degree angle to the camera, with...
  34. Thread: Tripod Holes

    by reddesert

    Re: Tripod Holes

    Sandstone is pretty fragile and friable. The boulder is probably in a lot of little pieces somewhere below the arch. Even granite typically breaks up during rockfall - that's where all the talus...
  35. Replies

    Re: Focus Shift For Infra-Red

    I don't have any direct experience with UV photography. Pretty much every lens is going to have a focus shift in the UV and IR, and the sense of the focus shift will usually be shorter focal length...
  36. Replies

    Re: Focus Shift For Infra-Red

    Every 35mm and medium format lens I have looked at with an IR focusing mark requires the lens to move further away from the film for the IR, ie the lens has a longer focal length in the IR. ...
  37. Re: Strategies in Cold - During and After Shoot

    You may like to read Kodak's tech publication on photography in arctic conditions: , but keep in mind that it's mostly written for conditions much colder...
  38. Re: Linhof Technika 4x5 parts... Need 2 screws... Hard to get!

    What is the thread on that screw? You may be able to get a plain screw with the same threading but not the hole as a stock item. I don't know exactly how that fits together, but I'd be concerned...
  39. Replies

    Re: Lens Not Focusing, What is the Cause?

    Some lenses do have smaller rear groups than front groups. Pictures of the lens, and how it is mounted and the camera setup, would be helpful in diagnosing the problem.

    You can try measuring the...
  40. Replies

    Re: Single Travel

    That's a fat bear!

    I've hiked and backpacked in a number of places, and outside of campgrounds, only ever seen one bear (black bear), and he ran away as they often do. In the areas of California...
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