B's 2015 Original processor

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Screenshot 2023-02-27 095754.jpg
Screenshot 2023-02-27 095824.jpg
IMG_20230325_190035188_HDR.jpeg
IMG_20230325_190411869_HDR.jpeg
IMG_20230325_190425518_HDR.jpeg
IMG_20230325_190508632_HDR.jpeg
IMG_20230325_190556870_HDR.jpeg
IMG_20230325_190639076_HDR.jpeg
IMG_20230325_190712131_HDR.jpeg
IMG_20230325_190814428_HDR.jpeg

B's 2015 Original processor

from $30.00

This is my re-design of the original B’s processor from 2015.

Simple, inexpensive and capable!

Full or partial kit:
Quantity:
Add To Cart

This is the re-design of the Original B’s processor

Please check my blog about the reasons of this re-design here


  • One way constant rotation, simple and capable

  • Will rotate most tanks from 1 to 3 reels

  • Adjustable speed (1/3 is recommended for development, full speed for fix and wash)

  • Easy thumb wheel length adjustment

  • High quality stainless steel hardware

  • Comes as a full or partial kit (if you want to 3d print your own parts find STL’s here)

  • Designed and 3D printed in the USA. (kits colors will ship randomly, currently Blue, Yellow and Green, but will be subject to change)

  • Find the assembly guide and the necessary tool list here.


My goal here was to make something easy to build and very inexpensive for the analog photographer on a budget. If you go to the STL’s page to print your own you will also find a parts list to source everything yourself!

I hope this will introduce some photographers that wouldn’t otherwise to rotation development and its great workflow!

I will ship the full kit internationally but it is on the expensive side so your best option is to buy the hardware kit only and have somebody in your country print the parts for you.