>>3343406Congrats on a nice camera that is going to serve you well for quite some time. As mentioned earlier, I recommend the Skopar 35mm 2.5. In ltm there are two versions of it, one with a focus lever and one without. While both use the same optical formula and glass, the one with focus lever matches the dedicated hood, while the one without only matches 43mm screw-in hoods. It's not the fastest, but a fine lens and compared to f/2 lenses, it's only 2/3 stops slower. The Industar 50 is also slow, but I got some pretty sharp examples of it (again, image related and shot wide open). Personally, I prefer its classic Tessar rendering over the Sonnar one of the Jupiter 8.
If you feel the need for another 50mm, I recommend the Skopar 50mm 2.5. It's also 2/3 stops slower than the Jupiter, or 1 stops slower than the Canon 50, but comes with a focus tab and modern coatings. Check flickr, but especially rff for examples of possible lenses.