Fourth, I have shot now 250+ rolls of film with my Hexar RF. I have tested the following lenses with it, all wide-open, all at close range and with no problems, whether M lenses or M39 lenses with the most egregious generic adapters: 35/1.8 Canon; 35/2 Summicron (4th gen); 35/ 2 Canon black; 35/2.8 Jupiter-12 black; 50/1.2 Canon black; 50/1.4 Nikkor chrome; 50/1.5 Canon Chrome; 50/1.5 Jupiter-3 chrome (2); 50/2 Summar collapsible; 50/1.8 Canon black; 50/2 Summicron (M3); 50/2 M- Hexanon; 50/3.5 Industar collapsible; 85mm f/2 Jupiter-9 (3, both versions); 85mm f/2 Nikkor chrome; 90mm/2.8 Elmarit-M; 90mm/2.8 M- Hexanon; 105mm/2.5 Nikkor black; and 135/3.5 Canon black. If these rangefinder "problems" don't manifest themselves with the 50/1.2, the 50/1.4, the 85/2 lenses and 105/2.5, they are not going to manifest themselves at all, despite the fact that what you *think* is infinity does not line up.

Can change the metering pattern subtly; interesting that the shutter chamber appears to have been fitted precisely to the rear element of this lens. (3 samples tested)

Concernant le Jupiter, oui, il pouvait y avoir l'argument du prix ; mais c'est juste que je n'ai pas de 35mm, ni en 39 à vis ni en M, et que cela m'aurait permis d'en avoir un assez vite.
Après, je peux être patient et m'orienter vers du matériel un peu plus cher, ne serait-ce qu'un Voigtländer f/2.5 ou f/1.4.