Hello again Umut !
Originally Posted by Mustafa Umut Sarac
The CMS 20 is an extremely fine grained film and if exposed and developed correctly will give you outstanding results. However it is not the easiest film to handle. I have used it myself in 135 size and grain size and resolution leaves nothing more to wish for. Developing the film was a bit tricky as you need the special developer ADOX ADOTECH . In some occasions you could get uneven development on large, evenly lit highlite areas. It also requires shorter fixing time as the emulsion is very thin and curling may also be a slight problem. These problems
can be handled without to much effort.
When the 120 version was introduced earlier this last automn, a modified developer ADOX ADOTECH II was also introduced. From what I have read it takes care of much of the problems with uneven development but I have not tried that myself. As Jim Noel writes, a glas negative and contact printing is superior but this film and an enlarger will take you a long way if handled in the right way. You may need to use a few rolls for testing. If you want to know more about it, send a mail to ADOX/Fotoimpex. They can correspond with you in both German and English. Mirko, their manager, is regularly answering question here on APUG.
I hope it will work for you.