Long-time film photographer Timothy Gilbert was frustrated with existing options for processing 4×5 large format sheet film at home, so, as an engineer, he decided to create an easy-to-use and affordable system himself.
After several prototypes and extensive testing, what he came up with is the SP-445 processing system, an extremely compact and simple tank that requires minimal chemicals and effort.
Here’s a short video in which Gilbert introduces the SP-445 and shows how it works:
Unlike the big bulky box-shaped tanks of the past, the SP-445 looks more like an oversized flask. The system can handle 4 sheets at a time and process them with just 16 oz (475ml) of solution — by comparison, some existing tanks require 55 oz.
The tank is easy to load, simple and reliable, easy to fill and empty, easily agitated, and inexpensive. It uses a sheet holder that’s just like standard 4×5 film holders, allowing you to insert your film back-to-back into the compact space (the tank will hold two holders for four sheets).
The lid of the tank slides into place and locks. Liquid is filled and drained through a simple spout on one end. For agitation, instead of having to shake the entire tank around, you simply use a “turbulator” (a solid plunger) to pump the liquid up and down through the spout, which agitates the liquid in the main chamber.
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Gilbert is turning to Kickstarter to bring his new invention to market, and the campaign has already exceeded its $27,000 goal in a handful of days after being launched. A contribution of $47 or more will get you at least one complete SP-445 system (a tank, lid, and two film holders) if/when the project successfully delivers in April 2016.
The suggested retail price after the initial units ship is expected to be around $80 or $90.
Thanks for sending in the tip, Mark!
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