Enthusiast from Portugal.
Meanwhile I got the Lumix 20mm f/1.7 in a very good deal and I'm very happy with it, though it's just 40mm equivalent.
Also, search for the metabones speedbooster and see what it does, might fit your needs. Cheers
Hello there Alex. I am not an expert but I've been looking lately for the same, a nice wide lens under 500$.
A 35mm equivalent should be a 17mm lens:
- Olympus M.ZUIKO Digital 17mm f/1.8
- Rokinon 16mm T2.2
- Olympus M.Zuiko Digital 17mm f/2.8
- maybe the Lumix 20mm f/1.7 pancake
The Voigtlander lenses are awesome but expensive if you want to buy a set of lenses.
I wanted something wider. Since I can't afford the Olympus 12mm 2.0 which as a lovely look I searched for cheaper solutions. I wanted a 24/22mm equivalent. Here's a nice option, lumix 14mm 2.5 plus wide angle adapter (with good reviews):https://www.youtube.com/watch?v=mlgX2lEPGk8
You can also search for rokinon 12mm t2.2 cine lens by samyang but I think it distorts the image too much.
Hope it helps. Good luck figuring it out!