Vivitar Ultra Wide & Slim + Redscaled Konica Minolta VX 200.)
Harris vs Lewis Redscale - July 2010.
I did not line up the film, nor take notes, nor plan the compositions. I did decide to shoot the entire roll through on Harris and after respooling, shoot over it again whilst on Lewis.
The negatives were returned uncut as requested, but I did get lab scans. I have cropped where I feel it is most helpful to do so - the luck of the draw has meant there was very little (if any) frame overlaps on this roll, which made me very happy.
Basically it involves taking a roll of ordinary 'bog standard' print film, reversing it and respooling it into another film canister (all done in a dark bag) so that the light is exposed on 'the wrong side of the film' when you take a shot. You then lose two 'stops' on the optimal exposure conditions from the original. It gets developed in exactly the same way as print film, but be prepared for the technician to be a little startled (at best) or a little irritated (at worst) when they realise that something very odd has happened to the film. :)