Adox CMS 20 is a difficult film to shoot. That at least is what I have read. I decided it is time to learn how to shoot this film. The film has a special developer, Adotech IV, but before I committed to shooting the film I wanted to see if the characteristics of the film interested me. My first roll had lots of problems but overall, I can see a use for the film in my work. I used the Nikon F4 and I shot the film at 20. (In bright sun the manufacturer recommends shooting at 12) I developed the film in Rodinal 1:100 for 20 minutes @20C. I agitated every 5 minutes so overall I agitated 4 times.