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Adox CMS 20 II Professional 4 x 5" Black and White Negative Film (50 Sheets)

BH #ADCMS2204550 • MFR #120145-V1
Adox CMS 20 II Professional 4 x 5" Black and White Negative Film (50 Sheets)
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Adox CMS 20 II Overview

The Adox CMS 20 II Professional 4 x 5" Black and White Negative Film is an extremely high resolution, fine-grained film featuring a slow nominal sensitivity of ISO 20/14° when developed with the recommended Adotech II developer. Slower speeds can be used to reduce overall contrast or when utilizing other developers. A unique monodisperse emulsion layer provides high sharpness and resolution with virtually no perceivable grain, and a anti-halation layer has also been incorporated between the emulsion and film base to maintain consistent sharpness void of halation effects. The film's base is completely transparent, making it well-suited for scanning and copy work, as well as reversal processing techniques (using Adotech II as a first developer) for projection. Its orthopanchromatic sensitivity is a responsive to all light and requires no filtration for pictorial applications.

This item is one box of 50 sheets of 4 x 5" sheet film.

Adox CMS 20 II Specs

Film Size (W x H)4 x 5" / 101.6 x 127 mm
Film TypeOrthopanchromatic B&W Negative
Film ProcessingStandard Black and White Chemistry
Film SpeedISO 20
GranularityRMS = 14
Quantity50 Sheets
Packaging Info
Package Weight0.55 lb
Box Dimensions (LxWxH)5.8 x 4.9 x 0.7"

Adox CMS 20 II Reviews


By dw
Rated 2 out of 5
Date: 2020-05-13

..don't use this or any other 'copex' film for reversal processing. The results are mediocre at best.

See any errors on this page? Let us know



how does the film do with longer exposures?
Asked by: daven h.
Here is the reciprocity of this film, straight from the Adox CMS 20 II data sheet:1 Sec. + 1/2 F-Stop10 Sec. + 1 F-Stop1/1000 Sec. + 1/2 F-Stop.
Answered by: John-Paul P.
Date published: 2018-08-25


compared to ektar 100 B&W, how good is the grain structure and post processing results for this film?
Asked by: Jesse
Ektar files are more forgiving in post, and of course there's the tones that used to be colors that can be individually manipulated in B&W; Ektar B&W conversions can look very good, whereas Adox CMS 20 when the planets are aligned can appear stunning. I don't use colored filters with CMS 20, it doesn't need them
Answered by: david m.
Date published: 2018-08-25


Can i develop this film in Ilfosol 3 ?
Asked by: Trey B.
I haven't used ilfosol 3 for this, but the massive dev chart shows 1+14 for 6 minutes. I would try this first and tweak from there.I personally stand develop in 1+200 Rodinal for 1 hour after shooting at iso 12.
Answered by: Grant Q.
Date published: 2018-08-25


The spec says the recommended developer is Adotech II, which is discontinued. What are the recommended alternatives?
Asked by: Adam S.
Adox CMS 20-135 EI 12: Develop in Photographers Formulary TFX-2, 1+1+10 dilution 14 minutes. Continuous agitation for the first 30 seconds or more, 20 second agitations per 3 minutes thereafter will reduce contrast that can otherwise be severe. Negatives will appear a bit thin; underdevelopment works well with this film and developer taking an extra bite out of contrast. Been waiting to try TFX-2 developer with the 120 format, but it hasn't been available for quite some.
Answered by: david m.
Date published: 2018-08-25


How am I going to develop this film? My college have a lab for B&W developing but since Adox films need special developer, what is the dilution ratio and time for developing?
Asked by: Benjamin K.
Hey Benjamin,According to the Adox data sheet for CMS 20 and Adotech III developer, the dilution for development is 1+9. Agitate for the first 30 seconds and then once per minute. No need to pre-soak the film, as it will increase contrast, you must use an acidic stop bath, and you only need to fix this film for 30-60 seconds. Overfixing will lead to burnt out highlights. You can also shorten the wash time to 5 minutes. See the full data sheet here:
Answered by: John-Paul P.
Date published: 2018-08-25


Has anyone shot both Adox CMS and Rollei RPX (25 ISOs)? Comparisons?
Asked by: Karen
Yes. Both great. Finer grain on the Adox I'd say. Rollei may have had a little more contrast, but I was in a totally different environment. I really loved the results I got from adox.
Answered by: Austin B.
Date published: 2018-08-25
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