I went through this exact same thing back in 2018 when I took an M10 and a Noctilux to Tokyo for a week. I thought my neck was gonna snap after day two. Those thin stock straps are basically cheese wire once you put real glass on the body. I tried some cheap ones from Amazon first but they were stiff as cardboard and actually made the chafing worse... honestly a waste of money. What you want is something that spreads the load without being some ugly neoprene gym bag strap. I eventually landed on the Rock n Roll Straps M-Leica Classic Black Leather 100cm and its been on my main body ever since. Its made of these linked leather pieces that kinda act like a shock absorber when youre walking. It stays supple because the leather is high quality but the width is what saves you. If you want something more traditional but still beefy, the Artisan & Artist ACAM-280 Leather Strap Wide is another solid bet under your budget. Its wider than the standard stuff and the leather gets buttery soft after about a week of heavy use. I found that with the 75mm Lux, you really need at least 15-20mm of width at the neck. Dont cheap out on the thin ones just because they look classic or youll be miserable in Berlin. Those cobblestone streets and a heavy lens will kill your posture if the strap is digging in.

Just catching up on this thread. I actually disagree a bit with the idea that just going wider is the automatic fix. If the leather is too thick, it wont contour to your shoulder properly and that heavy 75mm lens will just bounce around. Be careful with those heavy-duty belt style straps... they look cool but take forever to break in.

• I would suggest the Clever Supply Co. Padded Anchor Strap. It is about $135. The padding is super subtle but makes a massive difference for long days in Berlin.
• You might want to consider the ONA The Lima Camera Strap too. It has a slim profile but uses a hidden padded neckline. Usually runs around $90. Make sure to check if the strap has lug protectors. You dont want metal rings rubbing against your Leica top plate. Honestly, that lens is a workout regardless, so stretch that neck before you head out. Let me know if you need any gallery recs for the trip!

Late to the party but I wanted to chime in because that 75 Lux is a total beast. I learned the hard way during a rainy trip to London that just getting a wide strap isnt enough... if the leather is stiff as a board it just digs in at different angles. You really need something that molds to your shoulder over time.

• Might want to consider the Barton 1972 Braided Leather Strap. The braiding actually helps distribute weight better than a flat piece of cowhide because it has a bit of natural give.
• Also look at the Tap & Dye Legacy Leather Camera Strap. Their 1 inch version is basically indestructible but gets soft fast once you start using it. Be careful with the metal split rings tho. I've seen some straps leave nasty gouges on M bodies if they dont have proper leather bumper flaps. Make sure those are thick enough before you head to Berlin.