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Frank Walsh
1,530 followers -
Husband, Dad, Geek, Coach, Engineer
Husband, Dad, Geek, Coach, Engineer

1,530 followers
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Frank's posts

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If you are a photographer who values the act of creativity as much as the gear, you should subscribe to Borut's channel on youtube.

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Weather in Pennsylvania has finally been consistently good enough to get out for a few rides on local trails.
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4/23/17
2 Photos - View album

Can anyone point me to a reference for Channel Mixer settings that will emulate/duplicate the effect of classic "wratten" black and white filters (e.g. #25 red, #15 yellow, etc)? It seems that this should be something that can be directly set since these are known wavelengths and I am surprised that there are no presets in the channel mixer for these standard black and white looks.

Of course I can play with sliders to get a look that I like, but I would like to start off with a look similar to black and white film out of the camera with a specific filter.

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More characters from this weekend's craft beer event.

Topcon RE Super, 58mm f1.9
Ultrafine 400 shot at 800 and processed in Diafine
Scanned and edited in Darktable
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Also from this weekend (beer event at a local nano-brewery)

I shot and processed another roll of Kodak Color 400 with my Minolta Hi-matic 9. I really love that rangefinder.
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Finally had an opportunity to try out my repaired Topcor 58mm on my Topcon RE Super and the results are fantastic!

Shot on Ultrafine 400 (at 800) and processed in Diafine
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Finally had an opportunity to try out my repaired Topcor 58mm on my Topcon RE Super and the results are fantastic!

Shot on Ultrafine 400 (at 800) and processed in Diafine
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Success! This is what the results look like when you use the correct chemistry :-)

After my disaster, I shot a test strip of 6 frames and when through my developing process VERY CAREFULLY. The results are excellent and I am quite happy.

FYI I have found that I can use a Nesco slow cooker to keep my water bath at a perfectly consistent temperature. It is like this one. They are very cheap to find used:

https://www.amazon.com/Nesco-481825PR-Professional-Stainless-Porcelain/dp/B003I4F7D0/ref=pd_bxgy_79_img_2?_encoding=UTF8&pd_rd_i=B003I4F7D0&pd_rd_r=0F2M1TD6P31CV8G97ART&pd_rd_w=SOCbL&pd_rd_wg=46OwA&psc=1&refRID=0F2M1TD6P31CV8G97ART

I spent some time to determine where to set the thermostat (it is only marked as low as 200F) and made a mark at this spot. It is large enough for all the chemistry and the tank, so the temperature stays consistent all the way through the process.

Color processing is really quite simple when you use the right chemicals and keep the temperature consistent.

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Processing of my second roll of color film went very poorly compared to the first. I wish I knew what happened.

Film and chemistry were the same. If anything, my temperature was more consistent. Yet my negatives came out VERY dense and unusable. Even the sprocket holes were so dense the film info was hard to read. Color is non-existent.

I wish I knew what went wrong and if I could trust this chemistry. In my mind the only thing I can think of is that possibly the temp was too low. My water bath was VERY consistent at 102 F, but the truth is I didn't check the actual chemistry temp. I assumed that since the bottles were in the bath for nearly an hour, the temperature would be consistent with the bath.

Any C41 experts out there who can help?
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Back in the summer, I dropped my Topcon RE Super onto a concrete sidewalk, doing severe damage to the lens and a few minor dents into the body. After searching for a while I got a lens for a good price on eBay that appeared to be in very good condition, only to find that when I got it the aperture was not working properly. Turns out there was a broken pin on the iris assembly. So I had to destroy my already damaged lens so I could get it apart and swap the optical assembly from the old lens into the new one. Viola, now I have a perfectly functioning cosmetically clean lens. I fixed it!
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