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To clean glass sample tubes used in a mass spectrometer years ago we first washed the tubes in fuming nitric acid, then a wash in copious amounts of distilled water, finished off with a dip in pure...

A fine image in its own right. Your judgement was spot on, Paul. I like it very much.

To my eyes it looks like areas of silver dissolved out of the emulsion. Maybe something in the developer, like precipitated sulfite, that's become stuck to the emulsion?

Hi Paul,

The driver is from the same seller. I used this one for use with a dimmer:...

Paul, I use these for safelights for x-ray film and paper:...

There is evidence of camera movement here. Pinhole photographs usually require long exposures and therefore a stable mount for the camera. I'm guessing your exposure here was at least 1 second. A...

I've used an ordinary sewing machine to make lens pouches. I used garment leather which is quite thin and would be suitable for bag bellows, and it sewed beautifully. I think anything thicker than...

Junsong Huang it's so good to see your work again. Your photographs are both culturally and artistically important. Thank you very much for sharing them with us.

Dirk, these are superb! No other word for them. As one who plays around with camera builds I can see a level of finish that I always strive for but seldom meet. I also have a Linhof branded 65/8...

These Multigrade heads are getting pretty old now and seem prone to problems which may be hard to find. Last year my 500H started playing up and I couldn't find what was causing it not to work. I...

Thanks James. I also have in the back of my mind an 8x10 or possibly bigger sliding box camera, partly inspired by your previous posts.

Thanks everyone. Maris I'll do some more pics of the camera as soon as I make the screen. As for my success with X-ray film, I've only ever used the Kodak Dental Panorama 5x12 film, and I do find it...

I've been working on this all year, a good lockdown activity. 5x7 made from Huon Pine, a native of Tasmania. Prized for boat building (it resists rotting) and fine furniture making. I considered...

Thanks for the idea. Tried it and it didn't even recognise the scanner. I've concluded I've got a dud.

Thanks all. Yes I have tried VueScan... I've been playing around with it for several days, without success. However VueScan says my scanner is a ScanJet 4850C, which may or may not be equivalent. The...

I was given this scanner about five years ago and it's always been temperamental; in that time I've only managed seven scans! The main problem has always seemed to me to be the software, in that what...

Superb, Dave. Congratulations.

Someone has to ask this, Maris... How come the sign is mirror reversed but your tee shirt and camera are not?

Great work, Yuriy, love them all.

Like both of these Chris.

Scott, two things stand out for me: (i) I have never developed with PMK at 160ºF which is about 70ºC. Is this your real developing temperature? (ii) I never tray develop more than three sheets at a...

Congratulations Chris and Pippa. I wish you both many more happy anniversaries.

Works nicely Chris. It's good to know how conventional processes work with this film. The mid tones and highs are very nice. I believe colour C41 film can be processed in conventional chems. I've...

My contribution to WWPD 2020, made with the camera described here: https://www.largeformatphotography.info/forum/showthread.php?136967-LF-Pinhole-design-and-building/page5
Film was Kodak Dental...

Lovely Merg. Love everything about that pic - beautiful tonality and many subjects within the main subject.

Beautiful picture Mohammad; the light is gorgeous.

Jimi, what I (and others) found confusing was the published ANSI standard for 5x7 holders - they are so different from the actual sizes of available holders. I was prepared to follow the published...

Hi Alan, it turns out that my two half plate Fidelity holders are in every external dimension identical to your 5x7 Fidelity holders. The differences are all internal and are to do with the guides...

Thanks again, Alan. I will eventually get some proper 5x7 holders, which would be ideal to have so that I can make the back to fit the actual holders I have on hand. With the economic hit to the...

Thanks Alan, that's a great help. My Fidelity Deluxe Half Plate holders are identical to 5x7 as I was told, so I can go ahead and build the camera back to suit. Would you mind also checking the image...

I'm glad I found this thread because I really need to know the main dimensions of 5x7 film holders. I'm building a 5x7 camera and am currently working on the rear standard. I really thought I had...

Great work, Igor - all of them.

I get mine from China via eBay. Just put in the size you want... lots of choice.

I've finally made the break with Adobe after a couple of tries. The problem was that for a long time I couldn't see an alternative to PS and particularly LR. I'm now using GIMP and Darktable, and for...

Thank you also from me, Clement. Beautiful images which are a joy to contemplate.

A few days ago I was thinking about Newton rings and wondering why I never get them. I think the answer is that I've been using the same sheet of 6mm thick glass for decades and in that time it's...

5. Vine stems on forest floor. (FP4 at ASA50, Kodak 10" Commercial Ektar, D7 developer.)

6. Mountain Clematis on log. These wonderful plants climb and scramble over everything and are a truly...

Saddened by the destruction caused by the recent bushfires in Australia I decided to revisit some of the 8x10 negatives I made when living in part of the affected area during the 80s. This place was...

Yes I've been thinking along these lines. In the case of my 5x7 x-ray neg there are two emulsions, one of which is pressed hard against the white backing in the scanner. Also the thin space of the...

Thanks for the interesting thoughts. Actually Christopher's comment struck a chord with me. The second image, the 5x7 pinhole x-ray of the tree came out looking somewhat like an ambro- or tintype,...