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BTZS Film Tubes are legendary among large format photographers.
Film Tubes are a simple to use rotary processing system that works better because of random two-axis manual rotation not found in any other processing system.
The tubes not only spin but wobble in the water bath therefore agitation is truly random.
Now you can mix different films, developers with different processing times and run them all in one run using a minimum amount of developer - only two ounces per 4x5 sheet - for greater economy.
4x5 film tube kit includes:
I've been a photographer for over 25 years now and have constantly battled uneven development. Your tubes give me perfectly even development - and I am quite grateful. C. G.
It is rare to find a product as well thought out and as well made as the BTZS Film Tubes. F. T.
I bought the Film Tube Kit and a Film Test per your recommendation and have spent my time making photographs instead of testing ever since. J. Q.
Simple, Elegant . . . Congratulations! S. W.
Instructions are available for viewing as a PDF and may be downloaded to your desktop:
Posted by David on 7th Apr 2015
I didn't process sheet film at home because I didn't have a sink or space large enough to accommodate running water baths and trays, plus the awkwardness of kneeling into a bathtub in the dark was never very appealing either. The BTZS tubes system, and the fact the it is one of the most reliable, chemistry efficient, and it requires minimal time in total darkness has sold me on processing my sheet film when I can't get to a darkroom.
Posted by John Nistico on 12th Jan 2015
For 4x5 B&W Zone System, there's nothing more effective than the BTZS tube system. Saves money on chemicals, and allows each individual film to be processed individually.
The product is stout, and not made of cheap materials. They'll last me a life-time.
Simply, THE BEST!
I should Have bought these 6 years ago
Posted by George on 6th Jun 2014
This is a very good system for developing sheet film. Sheets don't get scratched, as in tray processing. Each sheet can be developed to ideal conditions using the BTZS system. Once the tubes have been loaded, developing can take place with the lights on. Temperature is kept constant with the water bath. Developing is consistent and uniform. The 4x5 tubes are economical to use. Each tube holds 60 mL of developer, and one shot use also helps to provide consistent results.
Posted by Alan on 14th May 2014
I had tried the taco method but found I couldn't pour the developer fast enough. This left each sheet half fogged. I bought the BTZS tubes, watched Fred's videos, and developed 6 sheets the first time (Ilford Delta 100 in Ilfosol-3). Everything was perfectly even! Such a simple, yet effective method. I will never develop any other way.
Posted by steve on 6th Jan 2014
This kit worked great the first time I used it. This beats tray processing by a mile.
Posted by Eric on 4th Nov 2013
This set up is great! It's simple to use and I got great, evenly developed negatives the very first time! I bought it so I can develop each sheet of film individually. The design of the btzs system makes this pretty simple to do. The components are also of high quality.
Posted by Joshua on 27th Oct 2013
Been using these for a couple years now and they provide a nearly impossible to mess up way to evenly develop sheet film for much easier printing!
Highly suggested to large format photographers everywhere!