Adox FX-39 II developer
Based on the formula of Tetenal’s Neofin Red, it is now modified and produced by Adox. I tried this with Fomapan 200 and the result looks great!

This is what Adox has to say about this developer:
Shuttertesting
I have two Icarex 35 bodies, and I could not remember which one had vignetting because the shutter did not open fully.
My smartphone has the possibility to record video in slowmotion and I was wondering if this could be used to test the shutter of these analogue camera’s.
Here are the first results. Because the framerate is variable, one cannot establish the actual shutterspeed, but next time I will make a better set-up. (more light as well) Sound is funny but seems not to be in sync with the frames.
First the Icarex with serial number N1709: Shutterspeed set to 1/125
And now the number R11385: same shutterspeed
The shutter slit is not travelling the complete way