Forum: Photography in general
7th April 2024, 10:09 PM
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Replies: 19
Views: 802
A tungsten filament lamp in a opal globe will...
A tungsten filament lamp in a opal globe will give the same distribution pattern at switch-on, during the exposure and on cooling. But the difference in integrated light from several switched periods...
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Forum: Photography in general
7th April 2024, 10:00 PM
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Replies: 19
Views: 802
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Forum: Darkroom
7th April 2024, 09:17 PM
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Replies: 2
Views: 275
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Forum: Darkroom
23rd March 2024, 08:17 PM
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Replies: 2
Views: 275
spiral history
There have been several manufacturers and brands of stainless-steel spirals. I have identified Nikor (USA), Kindermann, ProCo, Hewes among the early types, but which came first?
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Forum: Monochrome printing techniques
3rd March 2024, 06:27 PM
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Replies: 96
Views: 25,766
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Forum: Darkroom
27th February 2024, 06:06 PM
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Replies: 51
Views: 3,730
Even if you don't take up my suggestion of the...
Even if you don't take up my suggestion of the dropper resistor, I ought to have added that the resistor should be rated at 5 watts or greater. Such resistors have stout lead wires that can be used...
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Forum: Darkroom
27th February 2024, 12:53 PM
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Replies: 51
Views: 3,730
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Forum: Darkroom
27th February 2024, 10:59 AM
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Replies: 51
Views: 3,730
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Forum: Darkroom
25th February 2024, 12:23 PM
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Replies: 51
Views: 3,730
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Forum: Darkroom
24th February 2024, 02:57 PM
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Replies: 51
Views: 3,730
In the 90s the company for which I was working...
In the 90s the company for which I was working had a 115V 60Hz generator built to test equipment destined for the USA. It consisted of a precision 60Hz oscillator and a powerful (audio) amplifier,...
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Forum: Top Tips
30th January 2024, 12:26 PM
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Replies: 26
Views: 3,554
You should not comment, in these pages or any...
You should not comment, in these pages or any other, on something you have obviously not viewed.
There has been a lot of unscientific chatter about the risk to film of high-power CT scanners. Ms...
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Forum: Top Tips
28th January 2024, 09:36 PM
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Replies: 26
Views: 3,554
Lina Bessanova
Lina Bessanova is a Russian-born lecturer in Photography at the University of Florence, Italy.
I come from a photochemical engineering background and I am always glad to view her stuff. She produces...
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Forum: Monochrome printing techniques
14th January 2024, 04:57 PM
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Replies: 11
Views: 1,471
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Forum: Photography in general
13th January 2024, 09:46 PM
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Replies: 25
Views: 2,983
I worked in Fribourg, Switzerland, on a...
I worked in Fribourg, Switzerland, on a roller-transport Kreonite machine for processing Cibachrome in process P3. The machine chassis was constructed of 304 stainless steel, the fastenings were of...
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Forum: Monochrome Film
13th January 2024, 08:59 PM
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Replies: 17
Views: 1,801
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Forum: Photography in general
25th December 2023, 08:18 PM
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Replies: 25
Views: 2,983
I worked with Ciba in Fribourg in the 80s, on a...
I worked with Ciba in Fribourg in the 80s, on a 42" wide roller-transport processor for the speeded-up P3 process. Increasing the speed and temperature was straightforward but drying was a headache....
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Forum: Photography in general
22nd December 2023, 04:32 PM
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Replies: 25
Views: 2,983
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Forum: Photography in general
20th December 2023, 06:02 PM
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Replies: 41
Views: 6,123
I have joined Reddit, which has sub-Reddit...
I have joined Reddit, which has sub-Reddit threads analog, analog community, darkroom and ItookAPicture (itap). Virtually all the contributors (posters) write of scanning their photographs and...
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Forum: Cameras - medium format
19th December 2023, 03:39 PM
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Replies: 30
Views: 9,289
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Forum: Photography in general
19th December 2023, 03:26 PM
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Replies: 25
Views: 2,983
chemical risks
Last week, while driving, I heard a distressing story on Radio 4 of a 'fine art photographer' who had recently been diagnosed with advanced cancer, probably caused by exposure to 'Cibachrome bleach'....
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Forum: Introductions
18th December 2023, 02:42 PM
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Replies: 25
Views: 8,330
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Forum: Help!
4th December 2023, 12:47 PM
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Replies: 20
Views: 11,879
It was happening to me on orange.fr until I...
It was happening to me on orange.fr until I logged into Google, which has been remembering my passwords and inserting them whenever. My mrs tells me that facebook has been doing this for her, ever...
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Forum: Photography in general
1st December 2023, 03:32 PM
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Replies: 41
Views: 6,123
It's here!
Harman announce their new ISO 200 colour negative film, Phoenix 200.
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Forum: Introductions
20th November 2023, 08:04 PM
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Replies: 23
Views: 2,730
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Forum: Introductions
19th November 2023, 05:41 PM
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Replies: 23
Views: 2,730
On B&W it didn't seem to make much difference...
On B&W it didn't seem to make much difference when I ran tests 60 years ago. In fact the sharpest lens in the test was a 3 1/4" TTH Ental, a Tessar- type 4-element objective. But it showed fringing...
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