I was disappointed by the Panoramic Adapter when I first used it. It was – and is – still fiddly at best to insert the film but once that obstacle is overcome it is not difficult to use. A 36-roll is good for a total of 16 panoramic 24×65 mm shots.
Using it with the 80 mm lens is seriously silly, the resulting postage sized strip of horizon is way to limited to be of any practical use. One site calls it a “stupid gimmick” and, on a fairly narrow lens it certainly is. Unless, of course, you have plans for taking photographs of ladders, snakes, the odd garden hose or pieces of string (waterproof stringettes perhaps:).
When used on the much wider 65 mm f/4 lens the situation changes quite a lot. Here I find the covered area is quite useful and interesting, like a panorama actually! The negs come out much wider than before:
Here I used a Kentmere 100 36-roll of film developed in HC-110 at 1:60 for 6 minutes. The usual devtime for this film is 7 minutes in the winter and 6 in the summer (due to the expected higher contrast in the summer). These times are still experimental but seem to do fine.
The negs were scanned at 3200 dpi on a Canon 9000f-scanner, then sharpened and some (too much?) added sepia in Aperture.
The main reason to use a Mamiya 7 in the first place is the optics and here this optic can be exercised with commonly available 135-type film. With the panoramic adapter photos of landscapes with horizon in them seem like good targets. Given 120-film one can of course rid oneself of the adapter and crop afterwards…
So, at last, there may be some actual practical use of this “stupid gimmick”…