One can upgrade the plastic lens with the « Premium glass lens » – or you can go the extreme lo-fi way and unscrew the lens to shoot through the embedded cca f/130 pinhole (anywhere between f/126 and 1/150 according to the Internet).
And a handy exposure guide:
The first set of photos are… really grainy, despite being shot on Ilford Delta 100, medium format. They were shot on an overcast day with exposures ranging from 30″ to 1’. Developed for 5’ in Rodinal 3 (10% dilution) @ cca 20°C, Ilford stopper (5%) for 1’, Ilford rapid fixer (20%) for 3 minutes or so. Washed for 5’ under running tap water, final 1’ bath in a 1% isopropyl solution.
Interestingly, a (significantly) longer exposure – about 10 minutes or so – yielded much less grainy results. More tests are here needed.
Everything Geek 