I agree with the sentiment that hurting old cameras should be avoided but current back can be easily removed and returned, so I do not think that it will create a problem.
I see the cameras as a tools. Yes, I can use 9x12 (or 6x9) with it but I also want to shoot pack film and Provia with it (yes, I could cut it down). Proper holder would make it better tool.
The ribbed 9x12cm single sheet holder in your photo were made by RADA in Germany. Kodak made 9x12 sheet film sheaths to fit those RADA holders. I have some brand new in the original boxes, 12 to a box.
Do you want to see the RADA catalog? I can post it (after finding it).
RADA 9x12 holder by Nokton48, on Flickr
Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/
“The secret of getting ahead is getting started.”
― Mark Twain
I've seen a RADA catalogue somewhere that gave the names of the different types of metal holders (millionen, normal & some other types maybe). If that holder has simple flat sides (no grooves or rails at the sides / bottom) it's the same as those used in a Perka camera, not impossible to find.
And Daniel is right, 9x12 Kodak film sheaths will fit - and there are lots of German made film sheaths out there too (Agfa made them, and I've got some unbranded, while there are also Soviet made film sheaths too). I have a bunch of them, but in use with varying 9x12 cameras.
Someone who used to be active on this site (Ian Grant) might be able to help, he knows a lot about plate camera stuff - think he's active on Photrio.
Having had a closer look at your photos, I think I have the remnants of a Mentor back in a box of plate holder bits & pieces (in an attic in a house in the UK, and I'm in Seoul right now, so can't go and check it out - but it's good to know what it is, thanks for having posted these images).
I haven't collected this type of holder - I have used other 9x12cm German/French types - but I have some of different types and a lot of Kodak 9x12 sheaths that somehow "arrived"!
There are single holders shown as well as 2 NOS film pack holders, which I believe find use as dry and wet plate holders these days!
Glad you mentioned Ian Grant (IanG) who has not been here since early 2017 and hasn't responded to PMs! He is very well informed about T-P shutters and the plate/film holders etc.
Found the RADA catalog. One of these holders listed will fit your Mentor Reflex.
http://www.galerie-photo.com/manuels/dos-rada.pdf
Actually on Page 9 is the Plattenkassetten, which is says fits the MENTOR. Takes 9x12cm film inserts.
So there you are.
http://www.macodirect.de/en/search?sSearch=9x12+film is where I buy some of my 9x12 film.
Color 9x12cm also seems to be easy to access, just not in the USA.
Last edited by Daniel Unkefer; 25-Jun-2018 at 15:44.
Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/
“The secret of getting ahead is getting started.”
― Mark Twain
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