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Type: Posts; User: Robert A. Zeichner; Keyword(s):

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    Re: QC problems with TMAX 400II

    I've been using TMY II for many years and have always processed the same way in my Jobo Expert drums and never before have I seen this particular issue. Static is definitely not an issue as all the...
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    QC problems with TMAX 400II

    Anyone experiencing pin holes in the current supply of T-Max 400 type II? I hardly every get dust problems on 4x5 using my routine technique for cleaning, but in a batch of around 75 sheets I just...
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    Re: Foma paper questions

    Thanks for your insight. I have since experimented with a "semi-gloss" paper and found that it closely resembles the old Agfa Portriga Rapid I sorely miss. Now I'm just trying to sort out the...
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    Foma paper questions

    Has anyone used Fomatone 132 and 133 paper who can describe the
    surface and maybe liken it to some traditional papers I might be more
    familiar with? One is described as "matte" and the other as...
  5. Re: Creating lens aperture scales - what a project!

    I first marked the tape with a .3mm mechanical pencil and proceeded to go up and down the scale marking all the other aperture settings, using the meter and probe to confirm the incremental changes....
  6. Re: Creating lens aperture scales - what a project!

    Measuring the comparative diameter of these two shutters is not as easy as you might think. The Compur shutter has many more blades in its diaphragm creating what appears to be almost a perfect...
  7. Re: Creating lens aperture scales - what a project!

    The diameter of the fiber optic probe is roughly 1/4". When holding it against the crosshairs of my gg, I seriously doubt my measurement would have been more accurate with the fresnel in place. ...
  8. Re: Creating lens aperture scales - what a project!

    Actually, there was nothing at all wrong with this shutter. I simply wanted to move the lens to a more modern
    Copal shutter like most of my other lenses.
  9. Re: Creating lens aperture scales - what a project!

    First of all, I removed the fresnel as this was simple in that it was mounted between the gg and my eyes. Since I was not taking any sort of an absolute measurement of light, but rather was using...
  10. Re: Creating lens aperture scales - what a project!

    White flat back tape is simply artists tape, similar to masking tape, but thicker, a true white color and without the crepe texture of masking tape. Here's a link to a source...
  11. Creating lens aperture scales - what a project!

    I have been wanting to mount a 203mm Ektar in a modern Copal 1 shutter for some time now and just assumed that adapters would have to be machined to accomplish this. Fortunately, the lens I had was...
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    Low angle viewing solution

    I was recently faced with the challenge of photographing from a low angle in very muddy, rocky and sometimes dusty conditions. I first tried this on my knees with a focusing cloth and quickly...
  13. Re: Mounting Wratten Filters To lens Question

    I have used cardboard slide mounts as gel holders.
  14. Has anyone successfully used reducer on T-Max negatives?

    I've tried a couple of the Photographer's Formulary reducing agents, but have not seen any change, even after 30 minutes.
    Does anyone have some insight on this? Are tabular grain films immune from...
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    Re: What did you compose at Water’s Edge?

    Here's one I've been trying to capture for a few years. There was always something not cooperating until just a month ago.
    203 Ektar with my little Anba Ikeda 4x5 on TMY.
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    Re: post your trees!

    It's been awhile since I last posted an image, so here's one from my last trip to the Greek Isles.
  17. Re: lens cells stick in shutter - any tips?

    Depending on what type of glue/locktite was used, this may require some heat and/or solvent to soften. I would first try taking a small sheet of innertube material or one of those rubber jar lid...
  18. Re: A question on making ground glass...

    I have used an old 2"x2" Tiffen filter (flat and thick enough) with a golf ball cemented to it with JB Weld. The golf ball makes for a very comfortable handle. With this combination, I have gotten...
  19. advice needed on making meter measurements with a fiber optic probe

    I was recently given a Gossen fiber optic probe that fits the LunaPro and similar style Gossen meters. I'm trying to use it to measure the absolute light output of various flat panel displays and am...
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    Re: Spacing a Ground Glass, Math Check

    If the image was in focus on the film when focused on the GG USING the Fresnel, then you would simply measure the thickness of the Fresnel and make shims = to 2/3 of that dimension. Make certain...
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    Re: A question for the lens gurus.....

    I've written an article about the importance of using a proper lens shade to reduce the amount of non-image forming light from getting inside the lens and the camera. In situations where you are...
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    Re: Wax to fix old stiff film holders

    I simply rub down the dark slides with waxed paper (Cutrite works for me).
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    Re: Photos not level...advice?

    If you have an i-pod or an i-phone, you can down load an inclinometer for .99 that will give you extremely accurate readings. Just hold it against the standards and adjust for 0 degrees. Works very...
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    Re: how critical is lens coating

    Optical coating reduces the amount of light reflected from the surface on which it is deposited. Uncoated glass reflects about 4% of the light striking it. Your lens is made up of a number of glass...
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    Re: Picker on exposure

    What Gem said about exposing for shadows and developing for the highlights summarizes zone system B&W photography. The first reading indicates what is needed to expose shadow areas sufficiently to...
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    Re: Does powder Dektol go bad?

    You might want to be real careful doing this as Dektol is not a single chemical, but a combination of powdered ingredients that must all be dissolved in water to assure the correct proportion. If...
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    Re: Mat Acetate Source

    No, as I rarely make contacts from 4x5 or 5x7 negs. There's no reason why you should have any problem doing so. In fact, this technique should make it easier to do any dodging and burning as that's...
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    Re: Mat Acetate Source

    What you are referring to is sometimes known as dodging and burning masks or pencil masks. I have that material and got mine either from a college book store in Ann Arbor or Utrecht art supply. I...
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    Re: Aircraft

    Quite a story. Ask your dad if the type he flew in had those strange bulges above the fuselage. I think those housed the equipment for sniffing out the subs. I seem to remember building a plastic...
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    Re: Doors and Doorways

    "Delapalachia" Somewhere in Georgia.
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    Re: Aircraft

    Okay, I found this on the web. More detail than I was aware of:
    the aircraft was purchased by Jim Flannery in August 1967 for use as a cocktail lounge atop his restaurant in Penndel, Pennsylvania....
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    Re: Aircraft

    This was made in the late '70's early '80's on a trip to the Princeton NJ area. I believe this was in PA just on or near the NJ border. They still kept the bubble port just behind the cockpit...
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    Re: Aircraft

    Taken with a TF (tiny format) SLR (Pentax 110 SLR) on Verichrome Pan. The galley of the restaurant is upstairs in the fuselage of the Super G.
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    Re: Post Your Photos of Machinery

    "Steam Cathedral"
    from a 2-1/4 sq. neg on TMY
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    Re: Doors and Doorways

    Ios, Greek Isles - 2009 "Open & Closed"
  36. Re: Apparatus to aid using Expert Drum with roller base

    Funny that we independently discovered the same funnel. I made a little block out of wood to enable me to attach to a shelf. Perhaps this will give you an idea for a quick release attachment for...
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    Re: GG and Film Plane Registration

    what camera are you using?
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    Re: Using Oversized Filters

    Another way to solve this is with a push-on series filter adapter and a step down ring. To do this you need to first know the actual outer diameter of the lens barrel. You say the Petzval is ~62mm....
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    Re: iPhone app

    just print one of these:

    http://www.salzgeber.at/disc/index.html
  40. Re: Gnass Filmholder Case - Some Design Thoughts

    I would be very interested in both a 4x5 and 5x7.
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