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    Re: Digital timer for Durst CLS 450?

    Oh, I figured it out.

    I was assuming the timer input on the TRA 450 was a low voltage control signal. Turns out it's just standard AC so I can just plug any ordinary enlarger timer in to it. ...
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    Re: Digital timer for Durst CLS 450?

    10 sec pft. Enlarging a 35mm slide to 4x5" FP4+ through the RGB filters is getting me around 70 sec at f22-f11 depending on the filter (yes, I have the heads dichro filters switched out). When I...
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    Digital timer for Durst CLS 450?

    I've got a Durst enlarger with the CLS 450 head, STA 450 timer/stabilizer and TRA 450 power supply.

    Was wondering if anyone had any ideas for adding a digital timer to this? Hopefully without...
  4. Thread: DIY photobook?

    by gnd2
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    Re: DIY photobook?

    Bookbinding... what a rabbit hole.

    I guess what I'm missing is how to apply it specifically to darkroom prints. I'm starting to feel stupid, like it's simple and obvious to everyone else but I...
  5. Thread: DIY photobook?

    by gnd2
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    DIY photobook?

    The thread on print-on-demand photo books got me thinking, what about a book from darkroom prints?

    I've seen portfolios of mounted prints in a box or the plastic sleeve portfolios, but what about...
  6. Re: Local Photo supply store told me Kodak has discontinued all development chemicals

    Sure, for B&W, but some of us like a little color now and then. I have no problem making my own D76 and dektol, but C-41, RA-4 and E-6 are another story.
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    Re: Seiko Shutter Mystery Lever

    Based on some google pics, I'm going to say cocking lever for the flash sync timer.
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    Re: Life after E6 and large format transparencies

    I've never done cibachrome but I'm disapointed it went away, sounds like it would have been right up my alley from what I've read.

    I've done some color negative but haven't been thrilled with the...
  9. Re: Are print drums a more practical way to print big in a bathroom?

    1000mL is what I use in 11x14 trays, just right IMO.
  10. Re: Are print drums a more practical way to print big in a bathroom?

    I use a drum to print RA4 up to 16x20 in the bathroom. I wash everything (RC, fiber, BW and RA4) in a tray in the bathtub. Up to 11x14 I use an old print washing tray with continuous flow of water....
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    Re: endless Bergger paper backorder...

    I just discovered the Print Film last night. Definitely interested in getting some of that in the not too distant future.
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    Re: PC-420D stirring speed

    I poked around a little more. The main PCB really looks pristine. However, I found that the motor coil was actually loose. It's also discolored, I suspect it has overheated at some point. I...
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    Re: PC-420D stirring speed

    It's not the pot. Don't even need to put a meter on it, if that was the problem the set speed on the display would be fluctuating. But it's not, it's perfectly smooth and stable.

    The first thing...
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    Re: PC-420D stirring speed

    Thanks. Something is definitely not right. Last night it randomly went from 500 rpm to almost a complete stop. Up till now it was mostly just annoying, but now I'm worried something is approaching...
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    PC-420D stirring speed

    Anyone familiar with these hot plate stirrers? I picked one up and wondering about the stirring. The speed fluctuates quite a bit up and down randomly, I expected it to be much more consistent (the...
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    Re: Color separation negatives - CMYK no digital?

    Maybe it wasn't clear when I said "pigments that will produce a nice black", but I wasn't referring to a true black pigment. I meant finding CMY pigments that would combine to produce acceptable...
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    Re: Color separation negatives - CMYK no digital?

    Mostly academic at this point, but I've been researching color carbon, but was starting to wonder why some processes like C-prints and chromes didn't seem to need a dedicated black while other...
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    Color separation negatives - CMYK no digital?

    When creating color separation negatives from transparency film, CMY is straight forward with RGB filters, CMYK is simple in the digital realm, but I got to wondering, what about CMYK without going...
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    Re: Tight Shutter Screw

    Acetone worked for me in a similar situation. Even have the thread for it:
    https://www.largeformatphotography.info/forum/showthread.php?157010-copal-0-stubborn-screw
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    Re: Pop-up darkroom...

    That's what I was thinking - wet plate or direct positive paper.
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    Re: Bostick & Sullivan kits

    What's a "proper" negative? My negatives have a good contrast range, but I'm used to the luxury of VC printing and making small tweaks to taste when printing. Are you saying with Pt / Pd you want...
  22. Re: Shutter Speed testing with Android Phone and Photoplug

    You don't need a battery (nor a switch). You need to connect it to the correct terminals of the jack.
    http://www.artdecocameras.com/resources/shutterspeed/
  23. Re: Wollensack Velostigmat 12" - your judgement please

    I didn't mean to sound like you don't have a reason to be unhappy, I just didn't want to get into the judgement debate and was trying to remain neutral (may not have succeeded there). I can totally...
  24. Re: Wollensack Velostigmat 12" - your judgement please

    I actually saved this auction to see what it would go for. I knew that Jim loves a little more "character" in his lenses than I wanted, so I passed. Sorry you weren't happy.



    I've seen this...
  25. Thread: PC Sync Debounce

    by gnd2
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    Re: PC Sync Debounce

    I've had the same problem with my packard. The thing is, the switch is closed as long as the shutter is open. Any stutter or hesitation would cause multiple triggers. If I get a good crisp...
  26. Thread: Help with Filters

    by gnd2
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    Re: Help with Filters

    I'm facing a similar issue. Cokin still has a universal adapter ring with screws like you described for their x-pro series holder. It looks like a few other brands / systems used to have similar...
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    Re: Neutral Density filter advice?

    Solid
    https://www.bhphotovideo.com/c/product/1158728-REG/lee_filters_75nd_std_100_x_100mm_neutral.html

    I actually have a set of soft grads that I got a good deal on several years ago (at the time...
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    Re: Neutral Density filter advice?

    Get closer to wide open at the 1/25 or 1/50 speeds offered by my slowest shutter with fp-4 or portra 160. Maybe not necessarily all the way to 4.5, but at least 5.6.


    It's the brightest...
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    Re: Neutral Density filter advice?

    Took some readings in bright shade around the outside of the house and was getting close to f/11 1/30 125, so I guess .6 or .75 could be all I need.

    The Lee Gelsnap and a set of polyester filters...
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    Re: Neutral Density filter advice?

    I had no idea! I could have gotten one of these and then just gotten barrel lenses instead of hunting down shuttered versions!


    Those Blackmagic guys sure take their ND seriously! They seem to...
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    Re: Neutral Density filter advice?

    Sorry, how does a Speed Graphic help? Especially if it can't take the 12"? :confused: I wasn't really looking at getting another camera, and I'm not familiar with Speed Graphics.

    Correct me if...
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    Neutral Density filter advice?

    Now that I've acquired a few "vintage" portrait lenses, and with the hopefully impending delivery of a Lomograflok Instax back, I've been thinking some ND filters might be useful.

    The lenses are...
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    Re: Meter & f-stop discrepancy

    Are you saying that modern transparency film has increased latitude or that we just aren't using transparencies any more? Because I'm planning to shoot transparencies for stereo viewing.

    In...
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    Re: San Diego Machine Shop Recommendation?

    I wasn't getting my hopes up but figured it was worth a shot. Some older posts seemed to suggest there were shops that would take on a small one-off project for a reasonable price. But I guess...
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    San Diego Machine Shop Recommendation?

    I have a toyo lens board (aluminum) that needs a larger hole. I've seen it recommended to have a machine shop do it rather than a potentially dangerous DIY hack job, but I'm having trouble finding a...
  36. Re: Extremely Dumb Questions about Lens Systems (Specially Cooke triplet)

    Your questions don't really have simple answers without a fairly in-depth understanding of physics. The thing about physics is that the details are important. "rays gather at one point" is ambiguous...
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    Re: Leaf Shutter High Speed

    I was referring specifically to the fastest shutter speed with the triangle comment. At the fastest speed, it starts closing again as soon as it reaches fully open, so a triangle. At slower speeds...
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    Re: Leaf Shutter High Speed

    I took your previous post at face value because I didn't want to get into the device characteristics, but since you've mentioned it again...

    No, it's not acting as a switch. It's wired in a...
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    Re: Leaf Shutter High Speed

    Yes, but this is still an imperfect measurement. As the measurement improves, the slopes lean in towards each other making a tighter peak at the top. Assuming a perfect measurement would be very...
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    Re: Leaf Shutter High Speed

    Horizontal axis is sample number. Sample rate is about 9615.3846 samp/sec. ADC is in free-run mode, 16 MHz clock source / 128 prescaler / 13 clock cycles per conversion.

    Lens was a Mamiya Sekor...
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