[pure-silver] Darkroom software

From: Claudio Bonavolta <claudio@xxxxxxxxxxxx>
To: "pure-silver@xxxxxxxxxxxxx" <pure-silver@xxxxxxxxxxxxx>
Date: Thu, 15 Jun 2006 23:48:22 +0200

A quick word to tell you version 3.5 of my software is online: http://www.bonavolta.ch/hobby/en/photo/darktools.htm You can only download the documentation (pdf) to check if it fits your needs. Please note documentation is not completely up to date.

Software is made of two parts: dry and wet side.

Dry side: - timer with precision down to 1/10s, it drives directly the enlarger through the interface. As previously, countdown may use sound functions (beeps or vocal). System can also drive the separate fan of some enlargers by indicating how long the fan should remain on after the bulb switches off. - metronome, it drives also the enlarger. Ventilator and sound functions are also activated. - test strip in stops progression, the geometric progression gives, in terms of densities, constant spacing from band to band. This function drives directly the enlarger and exposes the bands. - exposure adjustment calculation if you change one or more parameters like paper sensitivity, enlargment ratio, diaphragm, exposure factor given by a filter or if you just want to adjust the exposure by a fraction of a stop. - exposure factor for multigrade filters. - exposure factor for color filters. - negative contrast calculation and matching paper grade selection. You can use either the indicated sensor or whatever darkroom tool indicating an exposure time. - exposure meter. It works by comparing the actual enlarger's light to reference values. These values are stored in files. You can have an unlimited number of files and each file can have an unlimited number of reference densities. Different files are useful for different papers/processes or for different subject types: blonde/white skin girls portraits, black skin portraits, general landscapes, high or low key, zone system values, etc ... To these files, you can add real prints or scan of prints as visual reference. - transmission densitometer. You can use either the indicated sensor or whatever darkroom tool indicating an exposure time. - images database (not the proper word from a computing point of view) with their shooting, storage and printing parameters, included their masking sequence and layout. The various exposures are given in both time and stops values, a couple of buttons re-calculates the other scale.

Wet side:
- monitoring of the various films and papers processes.
Processes are fully customizable.
Various manual agitation methods are managed and you can define your own.
- dilutions calculation using various methods.
- common photographic units conversion.
- developer time adjustment according to temperature change.
- chemical formulas database.
The wet side program does not require the hardware interface.

What's next ? Basically, various other tools based on the RGB sensor like: various other exposure meters, color analyzer, histogram, reflection densitometer, ... And hopefully, one day, once you're all gone digital, I'll make the hardware interface available :-)

--

Claudio Bonavolta
http://www.bonavolta.ch

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[pure-silver] Darkroom software

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