Problems developing Rollei retro 400s

[Fotohuis RoVo]

<p>Adox/Efke 50 is an Orthopan film, Red not sensitive while the Retro 400S and 80S are films with extended Red sensitivity.<br>

So they have a completely different characteristics.</p>

[hernan_zenteno]

<p>Hi Robert. I use Adox and is a panchromatic film not orthopan. I don't know Efke.</p>

[Fotohuis RoVo]

<p>Adox CHS 25-50-100 = Efke 25-50-100.<br>

Efke 25-50 are Orthopan films, Efke 100 is Panchromatic.</p>

<p> </p>

[Fotohuis RoVo]

<p><img src="http://farm3.staticflickr.com/2092/2371296461_e7dba81ece_o.gif" alt="" width="352" height="170" /></p>

<p>This is the wavelength of Adox CHS 25 / Efke 25 film. Adox CHS 50 / Efke 50 has exactly the same curve fitting. on 620nm it has finished while Panchromatic films are going over 650nm.</p>

[Fotohuis RoVo]

<p>Adox is just a brand name of Fotoimpex. In the past it was from Dupont. You can sell all type of films under this name.</p>

[vincent_van_walt]

<p>Good evening Hernan and Robert and thanks for your suggestions. ASA 50 is a little slow for my purposes because I'm very set on using a deep layer developer such as Rollei RLS but that means losing at least a stop on actual film speed. RLS also has an operating temperature of 24 degrees; far too warm for the Adox 50 according to the literature link you supplied.<br>

Last night I rescanned some early trials (HP5, Pan F Plus, FP4) and came across a MF roll of Delta 100 developed in DDX and I must say it looked better than I remembered it. I'll now try Delta 135 in RLS and I could rate it at EI 40 which is just about acceptable for what I shoot.<br>

I will still use the Retro 80s which has worked really well in my 6X9 for landscapes but I'll just have to avoid photographing people with green or brown eyes :)</p>

 

[Fotohuis RoVo]

<p>Indeed CG-512/RLS has to be used on 24C for the best results and reasonable developing times. Most people are using it in rotary on a Jobo system (CPE/CPA/CPP or autolab) Doing Efke in CG-512/RLS you can add a small amount of Formaline to it to harden the soft emulsion.<br>

One of the best features of Efke are the single layer technique which is very sharp and the good reproduction of the mid grey tones.<br>

Another good option is the Rollei Retro 100 <em>TONAL</em> which is in fact an Efke 100 emulsion which has been made Orthopan with an Agfa Ortho sensitizer. So it's reacting like an Efke 25 but then in iso 100.<br>

I have tested this combination in CG-512/RLS too in 35mm. It's a very nice film.<br>

<img src="http://farm5.staticflickr.com/4016/4679023332_3aedf26ee1_z.jpg" alt="" width="640" height="402" /></p>

<p>Rollei Retro 100 <em>TONAL</em> in CG-512/RLS 1+4 E.I. 50 14:00 minutes at 24C. Leica M7 + Summicron 2,0/50mm. CPA-2 with elevator in rotary development.<br>

CG-512 is a reference developer of Uddo Rafay, a well known German chemist.</p>

[Fotohuis RoVo]

<p>The same film in 6x7cm roll film format.</p>

<p><img src="http://farm5.staticflickr.com/4018/4720717596_6ebf9f61a9_z.jpg" alt="" width="640" height="504" /></p>

<p>C.V. Bessa III 667.</p>