Hand-held Safe Light in B&W and Colour Versions.

Programmable Process Timer with Temperature Compensation and Foot Switch Control .

Do you ever have problems maintaining consistent temperatures when processing your film or paper? The new ProcessMaster II Compensating Process Timer is the answer!

The ProcessMaster II is a fully programmable Process Timer with several unique features. In addition to its eight programmable sequences of nine time steps the ProcessMaster II has a built-in thermometer probe to monitor chemical temperatures during processing and automatically adjust the processing time if the temperature changes. The probe can be placed directly in the developing tank or tray (as shown right, using a Paterson developing tank), or in a water bath, and will monitor the temperature during the process. Should the temperature fall the process time will be increased to compensate. Similarly, if the temperature rises the time will be decreased appropriately.

The ProcessMaster also has a "factorial development" mode for improving consistency when processing black and white prints in trays. This is based on the “Watkins Factor” method in which the time taken for the image to first appear on the paper is multiplied by a factor (the “Watkins Factor”) to determine the total development time. As the developer gradually exhausts during a printing session, optimum developing time increases; this method of timing effectively compensates for that exhaustion and maintains consistency. When the image first starts to appear on the paper, simply press the Start key or the footswitch and the ProcessMaster II instantly calculates the new development time. The factor can be set between 2 and 8; 6 is usually recommended. So for example if the image starts to appear after 20 seconds and the factor is set to 6, the total development time is 20 plus 6x20 or 140 seconds.

Adjustments to development time for Zone System purposes or contrast control are often expressed as a percentage of the normal time - for example “for low contrast subjects increase development time by 10%”. The ProcessMaster makes this easy - at the press of a key the remaining time display changes to show the percentage of the total so far elapsed. If you need to reduce development by 10% say, simply stop the timer when the display reaches “-10%”. An optional “run-on” mode allows the timer to continue to run after the programmed time has elapsed and the display will count up (to a maximum of 100% or double the programmed time) so you can easily add a percentage to the normal time. The display can be switched between percentage and real time whenever the timer is running.

We think all darkroom timers should have a footswitch for hands-free operation, and the ProcessMaster II is no exception! The timer has a pause and resume feature, and timing can be set to pause between steps or to run the whole programme without pausing but with audible prompts at the completion of each step. A big LED display and illuminated keypad mean that unlike most LCD timers, you can use the ProcessMaster in complete darkness.

If you want to use inversion agitation with a hand developing tank, a waterproof cable gland is available as an accessory. Fitting this to the tank lid as shown in the illustration on the right allows the sensor cable to be threaded through the lid and provides a leak-proof seal.

ProcessMaster Features

• Fully programmable sequence timer has eight programmes, each of which can have up to nine time steps.
• Each time step can range from 5 seconds to 2 hours.
• Built-in temperature probe optionally monitors chemical temperatures during processing and automatically adjusts process time to compensate for changes. Please note: this compensation feature is for black and white processes only.
• Large easily-read red LED display with adjustable brightness level.
• Footswitch included as standard for hands-free operation.
• Optional percentage display allows easy time adjustments, e.g “plus 10 percent” - useful for Zone System adjustments and compensation for developer exhaustion.
• Factorial Print Development mode for increased consistency as developer exhausts.
• Programmed times can be modified "on the fly" for temporary adjustments.
• Audible count-down during the last 10 seconds of each step (optional).
• Any step can be set to continue counting up after the end of the programmed time has expired, with elapsed time displayed in seconds or as a percentage of the programmed time.
• Pause and resume feature, plus your choice of pause-between-steps or continuous timing.
• Power-saving feature switches to stand-by after 30 seconds idle time - this feature can be disabled if desired.
• Powered by a single PP3/MN1602 type battery (included) or from an optional plug-in mains power supply - see the Sundries page for details.
• Splash-proof case and tactile touch sensitive controls for reliability.
• Full two year guarantee, plus 14 day refund if you are not completely satisfied.

ProcessMaster Specifications

• Eight programmes each of up to nine steps.
• Step length 5 seconds to 120 minutes (2 hours).
• Display type: 0.52" (13.2mm) Red LED, 4 digits.
• Illuminated keypad with low battery indication.
• External temperature probe with a range of 15-30 degrees C.
• Power source: 9v DC from internal PP3 / 6F22 type battery, or from an external power supply.
• Footswitch included.
• Size: WHD 145x85x28mmm (5.7 x 3.3 x 1 inches) approx
• Weight: 500g approx including battery and footswitch

Note on power supplies: The ProcessMaster II is supplied with a battery and can be used anywhere. However, if you prefer to use mains power we can supply UK or European type mains power supplies. For countries which use other mains standards (e.g. the USA) choose our Universal Power Supply. Suitable power supplies can also usually be obtained from local electrical retailers. Please see the ProcessMaster II User Manual for more information.

Black and White Enlarging Exposure Meter with Grey Scale Display and built-in Densitometer function .

Banish the Test Strip!

A baseboard enlarging exposure meter featuring our patented grey scale print tone indicator which shows you the tonal range of the print, so you can place important tones and preview the look of the print without the need for endless test strips. Includes a spot-metering probe with densitometer function, a wide exposure time range (1 - 240 secs) with steps in intervals of 1/3, 1/4, 1/6 or 1/12 f-stops, and storage for the characteristics of eight different papers. All the features of our Analyser Pro for users with an existing timer - or it can be connected to our StopClock Professional for instant transfer of the computed exposure to the timer.

The latest version features a new sensor and measurement subsystem which provides much faster response, especially at low light levels, and greater stability with changes in temperature and over time. In addition, a new Calibration Kit makes calibration faster and easier, and we’ve re-written the User Manual to make it clearer and easier to read. There’s never been a better time to choose an ZoneMaster II!

Why the ZoneMaster II is different

Enlarging exposure meters often suffer from a number of shortcomings. In many cases, a single reading is taken from a mid-tone area of the negative (or from a diffused image) and exposure based on that reading. This can work quite well but it won’t advise you which paper grade to use.

Enlarging exposure meters which indicate a suggested paper grade do so assuming you want your shadows to be at maximum black and your highlights at paper base white. This isn't always the case, particularly in portraiture work. And if it isn’t the case, then you’re on your own - back to the test strip!

The ZoneMaster II is different because it tells you exactly the shade of grey that you will get on a print for any spot measured area of the negative. You can see the effects of changing the paper grade without making a print - the ZoneMaster's display indicates the changes in print tone for each measured spot as you alter the grade setting. You can manually override the ZoneMaster's suggested exposure time in order to produce a lower or higher key print, and see the expected results before committing a piece of paper. You can even make your own grey scale for use with the ZoneMaster using your favourite materials and processing, so that its indications will be as close as possible to the final print. You no longer need to worry about compensating for dry down (the increase in density of a dry print as compared to a wet one) because the display indicates the tone on the final, dry, print.

All this adds up to a significant saving of both time and materials, and with paper prices rising this can only be an advantage. Darkroom work is much more enjoyable when your success rate is high! The ZoneMaster comes with a fourteen day money back guarantee of satisfaction, so why not try one for yourself?

ZoneMaster II plus StopClock Professional, or Analyser Pro?

We are often asked by potential customers whether they should choose the combination of ZoneMaster plus StopClock, or the all-in-one Analyser Pro. The Analyser is more convenient, but its timer is simpler than the StopClock. Our answer to this one is another question - 'what sort of printer are you?' For people who are interested in getting high quality prints with a minimum of effort and material wastage we recommend the Analyser Pro. Those who like to wring the last drop out of the negative by making several exposures, perhaps at different grades, on the same print will prefer the StopClock Professional. They will usually use the ZoneMaster to get a proof print quickly, then work on that to get to the finished print. Fine Art printers typically fall into this category. See the Compare page for full descriptions of the features of various products.

ZoneMaster II Features

• All the metering, control and display functions of the Analyser Pro are included in the ZoneMaster II with the exception of the enlarger / safelight switching.
• Built-in densitometer shows the log.D value of each spot reading relative to the brightest sample, and can be used to assist in refining your film development technique.
• Adjustable calibration caters for your preferences of paper, processing, and enlarger characteristics.
• Quickly determines pre-flashing and fogging exposures for contrast control, plus contact-sheet exposures.
• Can be connected to our StopClock Professional Enlarger Timer for instant setting of required exposure time
• Powered by a single PP3 / MN1604 type battery (included) or from an optional plug-in mains power supply - see the accessories page for details.
• Splash-proof case and illuminated, tactile touch sensitive controls for reliability.
• Full two year guarantee, plus 14 day refund if you are not completely satisfied.

ZoneMaster II Specification

• Metering spot size: 2mm diameter approx
• Internal measurement resolution: 1/60 stop
• Timing range: 1.0 to 240 seconds per exposure.
• Time setting intervals: 1/3, 1/4, 1/6 or 1/12 stop; user selectable at any time.
• Times for Test Strips can be displayed using the currently set time interval.
• Calibration: built-in, user adjustable exposure and contrast settings for all grades from 00 to 5 in half grade steps. Eight individual calibration sets.
• Display type: Red LED, 4 digits for time and paper grade: 15 segment bar graph for grey scale
• Illuminated keypad
• Can be connected to the StopClock Professional for full enlarger control.
• Size: Main console: WHD 145x85x28mmm (5.7 x 3.3 x 1 inches) approx. Sensor: WHD 80x56x24mm (3.1 x 2.1 x 1 inches) approx.
• Weight: 500g approx as shipped, including battery

Black and White Enlarging Meter / Timer with Grey Scale Display and built-in Densitometer function .

Banish the Test Strip!

This highly-acclaimed enlarging meter-timer combo features our patented grey scale print tone indicator which shows you the tonal range of the print, so you can place important tones and preview the look of the print without the need for endless test strips. Includes a spot-metering probe with densitometer function, a wide range (1 - 240 secs) heavy-duty (750W) timer which can work in intervals of 1/2, 1/3, 1/4, 1/6 or 1/12 f-stops, storage for the characteristics of eight different papers, and a clever burn-in feature which takes the guesswork out of printing. The perfect all-in-one solution for making the highest quality black and white prints - and it can be used for colour too!

The latest version features a sensor and measurement subsystem which provides fast response, especially at low light levels, and high stability with changes in temperature and over time. In addition, a Calibration Kit (included) makes calibration faster and easier, and we’ve re-written the User Manual to make it clearer and easier to read. There’s never been a better time to choose an Analyser Pro!

Why the Analyser Pro is different

Enlarging exposure meters often suffer from a number of shortcomings. In many cases, a single reading is taken from a mid-tone area of the negative (or from a diffused image) and exposure based on that reading. This can work quite well but it won’t advise you which paper grade to use.

Enlarging exposure meters which indicate a suggested paper grade do so assuming you want your shadows to be at maximum black and your highlights at paper base white. This isn't always the case, particularly in portraiture work. And if it isn’t the case, then you’re on your own - back to the test strip!

The Analyser Pro is different because it tells you exactly the shade of grey that you will get on a print for any spot measured area of the negative. You can see the effects of changing the paper grade without making a print - the Analyser's display indicates the changes in print tone for each measured spot as you alter the grade setting. You can manually override the Analyser's suggested exposure time in order to produce a lower or higher key print, and see the expected results before committing a piece of paper. You can even make your own grey scale for use with the Analyser using your favourite materials and processing, so that the Analyser's indications will be as close as possible to the final print.

You no longer need to worry about compensating for dry down (the increase in density of a dry print as compared to a wet one) because the display indicates the tone on the final, dry, print. For special cases, fine tuning may be accomplished with the built in automatic test strip generator.

All this adds up to a significant saving of both time and materials, and with paper prices rising this can only be an advantage. Darkroom work is much more enjoyable when your success rate is high!

In common with our acclaimed StopClock range, we have designed the Analyser using industrial grade components for maximum reliability. Gold plated switch contacts, fibreglass printed circuit boards and heavy duty relays mean that it should last a lifetime, so we confidently offer a two year parts and labour guarantee. In addition, the Analyser comes with a fourteen day money back guarantee of satisfaction, so why not try one for yourself?

Analyser Pro Features

• Up to eight spot readings of a negative can be taken and the corresponding tonal value of each on the final print will be displayed on the 15 step grey scale.
• Simple controls (harder, softer, brighter, darker) allow print contrast and brightness to be previewed without the use of test strips or prints - saves time and paper.
• Over and under exposure warnings. 12-stop measurement range.
• Exposure times of 1.0 to 240 seconds are calculated automatically by the Analyser Pro using the metering probe in conjunction with paper grade and built-in calibration settings. Exposure times can be adjusted manually.
• Basic and burn-in exposures are accurate to 1/12th stop maximum resolution and microprocessor controlled to within a hundredth of a second.
• Clever burn-in feature computes and times the difference between an increased exposure time and the basic print exposure. Makes burning-in a breeze! Simply make the basic exposure, increase the exposure time by the desired amount, then press and hold the Print key - the Analyser Pro subtracts the base exposure from the new time and times the result automatically!
• Adjustable calibration caters for your preferences of paper, processing, and enlarger characteristics for every grade of paper from 00 to 5, including half-grades.
• Automatic reciprocity failure compensation.
• Densitometer mode to help refine your film development.
• Eight individual calibration sets for different papers, surfaces, etc. Adjustable calibration caters for your preferences of paper, processing, and enlarger characteristics for every grade of paper from 00 to 5, including half-grades.
• Automatic test strip generation for fine tuning of print exposure; test strips can be generated either as incremental or full exposures.
• Switching capacity of 750 W (500W for 115v versions) handles most enlargers, including cold-cathode types.
• Industrial grade components throughout, including gold-contact switches and heavy duty relays, for maximum reliability.

Analyser Pro Specification

• Timing accuracy: Better than 1%. Timing repeatability: Better than 0.1%
• Internal measurement resolution: 1/60 stop
• Timing range: 1.0 to 240 seconds per exposure. Timing resolution: 0.01 sec
• Time setting intervals: 1/2, 1/3, 1/4, 1/6 or 1/12 stop; user selectable at any time.
• Automatic Test Strips can be made using the currently set time interval.
• Optional audible seconds tick ("metronome")
• Measurement spot size: 2mm (0.05 inch) approx. Measurement range: twelve stops, with over and under exposure indication. Up to eight spot measurements per exposure
• Calibration: built-in, user adjustable exposure and contrast settings for all grades from 00 to 5 in half grade steps. Eight individual calibration sets.
• Optional delay to accommodate slow-starting enlargers (e.g some Durst and Kaiser stabilised transformers)
• Switching capacity: (230v versions) 750W per outlet, 750W total. (115v versions) 500W per outlet, 500W total
• Display type: Yellow LED, 4 digits for time and paper grade: 15 segment bar graph for grey scale
• Size: Main unit: WHD 200mm x 65mm x 160mm (7.8 x 2.5 x 6.3 inches), Sensor: WHD 80x56x24mm (3.1 x 2.1 x 1 inches) approx. Weight: 2200g approx as shipped
• Accessories supplied: Mains lead, footswitch, enlarger/safelight connectors, calibration kit, instructions.
• Full two year guarantee, plus 14 day refund if you are not completely satisfied.

Easy to use if you’re beginning yet versatile and powerful enough for professional printers, the legendary StopClock Professional really will save you time and paper. Using our F-Stop exposure system in conjunction with a built-in automatic test strip generator and ten exposure memories per channel, you can set up a complete printing sequence quickly and easily, often with reference to just a single test strip! Once the paper’s on the easel and the lights are switched off, making the print becomes a simple matter of pressing the foot switch and shading the relevant areas of the print. No times to remember, no fiddling with timer settings in the dark. The two channels make split-grade printing a breeze, and there’s even a special mode which effectively allows the exposure and contrast of variable contrast paper to be controlled separately. And if the base exposure is changed, the StopClock recalculates all the burn-in exposures to maintain the correct density relationships! A special compensation mode alters exposure times to allow for the effects of “dry-down”, the change in apparent print brightness as the paper dries. It can also be used to compensate for the effects of toning.

StopClock Professional Features

• Base exposure time 1.0 seconds to 240 seconds, in steps of 1/24th to 1/2 f-stop (or of 0.1 or 1.0 seconds in linear time mode). Time is controlled to 0.01 seconds.
• All exposure times are set in coarse and fine steps of actual exposure rather than simple seconds, producing consistent changes on the paper. The fine step size is 1/24th f-stop (approx 2%). The coarse step size can be set to 1/2, 1/3, 1/4, 1/6 or 1/12 of a f-stop. Coarse/fine button toggles between 1/24th and the set coarse time step.
• Nine subsequent exposure times can be programmed, each calculated either relative to the base exposure or the total exposure time thus far. Burn-in exposures are set in steps of 1/12th to 1/2 f-stop. If the base exposure is changed, the burn-in exposures are recalculated to maintain the density relationships.
• Two completely independent channels, each having separate base and burn-in exposure times.
• Split-grade mode, in which exposure can be controlled using one channel while the second can be used to adjust contrast. Equivalent contrast is displayed in steps of 0.1 grade.
• Automatic test strip mode, for quickly producing test strips with 1/12th to 1/2 stop increments either as an incremental exposures or separate complete exposures.
• Exposure Compensation of +/-20% to allow for dry-down or and/or toning with respect to a test print.
• The clear yellow LED display brightness can be set to one of three levels. The display colour has been chosen to be safe for both colour and black and white printing.
• Audible beep at the end of each exposure, and optional seconds tick whilst the enlarger is switched on.
• Rugged steel enclosure and high quality components for reliability. Illuminated control buttons.
• Can be connected to our ZoneMaster for exposure metering.
• Automatic safelight switching; manual (focus) mode; 750 watts (500 watts in 115v versions) switching capacity; comes complete with a footswitch for hands-free operation.
• Exceptionally easy to use! All timing, including switching between channels, can be controlled from the footswitch.

StopClock Professional Specification

• Timing accuracy: Better than 1%
• Timing repeatability: Better than 0.1%
• Exposure setting accuracy: Better than 1%; resolution 1/24th stop.
• Timing range: 1.0 to 240 seconds per step, up to ten steps per channel, two channels.
• Timing resolution: 0.01 sec.
• Switching capacity: 750W per outlet, 750W total (230V only; 500W total for 115V version.). Suitable for cold light enlargers.
• Display type: Yellow LED, three levels of dimming, 590nm LEDs are safe for colour as well as b+w papers (Safe except for direct exposure - dimmer than the filtration control lighting on most enlargers)
• Size: WHD 200mm x 65mm x 160mm (7.8 x 2.5 x 6.3 inches)
• Weight: 2200g approx as shipped.
• Input voltage: 200-250V AC 50Hz (100-125V 50/60Hz optional)
• Accessories supplied: Mains lead, footswitch, enlarger/safelight connectors, instructions.
• Full two year guarantee, plus 14 day refund if you are not completely satisfied.

Flashing and Fogging aid for Photographic Materials.