This is not specifically a large-format product but aimed at analogue printing in general.
Having previously posted here about other products we produce at DLG Electronics and had some very good...
Type: Posts; User: Dave Gooding; Keyword(s):
This is not specifically a large-format product but aimed at analogue printing in general.
Having previously posted here about other products we produce at DLG Electronics and had some very good...
Now available at CatLABS in the USA.
http://www.catlabs.info/product/temperature-compensating-development-darkroom-timer
Different developers do indeed have different temperature coefficients; what is programmed in the unit is a compromise and corresponds to the Ilford time-temperature charts which are quite widely...
Neil, Drew,
Completely agree with your comments on compensation being imperfect and the need to remain reasonably close to the “optimum” temperature.
Although I have only very limited...
For those that do their own processing, we’ve started producing a new temperature-compensating timer.
http://www.dlgelectronics.com/compensatingtimer.html
We’ve manufactured a small initial batch...
I realise that this is an old thread but I found it when we were working on a new temperature-compensating timer, which is now available. It offers similar functions to the ZoneVI timer....
Actually looking at this again I think I must agree that +/-4 is no enough and I should at least go to +/-6, more if other films give a better range.
The advice I had when I designed the meter was...
Here are the results from my calibration test exposures.
I inserted a meter sensor in the back of the camera and measured its output at a given aperture when aimed at a grey test card in...
Thanks. what sort of range can a film sensibly cover? I did run a series of 20 or 30 test exposures on Ilford HP5 as part of a calibration exercise (to calibrate a sensor against which each unit is...
But isn't it the light actually hitting the film plane that you want to measure, since that is what the film records? I mean the whole point of metering in this way is to measure the actual amount of...
Interesting. I don't know a lot about smart phone apps - I'll have to find someone that does.
The only bit in my box that might be problematic in a smart phone is the front end stage. The signal...
Thanks xkaecs, that's actually very informative and tells me it is at least feasible to meter off the ground glass. I am not sure why readings should be lower at the edges and corners of the image...
Thanks for your interest!
xkaes - I am interested in the feasibility of metering off the ground glass directly, and did have a concept using a pen-like sensor that you could put against the glass...
Hi All,
My interest is not so much photography as electronics. I am here both for a bit of advice and to shamelessly plug my product.
I developed a focal plane meter for my father's 4x5 Sinar...