yo, honestly shooting M4/3 at night is a struggle sometimes lol. I love my GX9 too but let's be real... the noise gets pretty nasty if you aren't careful and that kit zoom is basically useless after 6pm. I've been through exactly what you're dealing with and it can be super frustrating trying to freeze motion without everything looking like a grainy mess...

Here's what I recommend after trying a bunch of setups:

- Panasonic Leica DG Summilux 15mm f/1.7 ASPH: This is the winner for the GX9 imo. It’s super sharp even at f/1.7 and that 30mm equivalent focal length is basically perfect for street work. Plus, it has a physical aperture ring that actually works on your Lumix body! You can find them for about $350 used or $500 new and they are lowkey the best value for money right now.
- Olympus M.Zuiko Digital 17mm f/1.8: I actually had issues with this one. I really wanted to love it because of the manual focus clutch, but unfortunately, the sharpness wide open was just not as good as expected for night shots. It’s compact, but for $400-ish, I felt let down by the image quality compared to the Leica.
- Don't get the Panasonic Lumix G 20mm f/1.7 II ASPH: It’s tempting cuz it’s cheap (like $250) and tiny, but the autofocus is sooo slow in the dark it'll seriously drive you crazy.

Seriously, just grab the 15mm Leica. It’s low profile, fast enough for neon lights, and matches the GX9 vibe perfectly. gl! peace

yo, i feel u on the GX9 night struggle lol. the 15mm and 17mm others mentioned are classics, but honestly, if you want the *best* technical performance for your budget, you gotta look at the Sigma 16mm f/1.4 DC DN Contemporary.

It usually goes for around $330-$380 new, which is a total steal. Compared to the f/1.8 lenses, that f/1.4 aperture really helps keep the ISO down when it's pitch black out.

- Sigma 16mm f/1.4 DC DN Contemporary: Pros - insane sharpness, fast f/1.4. Cons - it's kinda big for a GX9.
- Panasonic Lumix G 25mm f/1.7 ASPH: Pros - crazy cheap (like $150), super light. Cons - maybe too tight for some street stuff.

i've been super satisfied with the Sigma for night walks. the autofocus is snappy even in dim light. if you can handle the extra weight, it's lowkey the winner for pure image quality!! gl

I spent like hours doing market research before I picked my current setup because honestly, the price gaps between brands are so weird in M4/3. It’s kinda a toss-up between paying the 'premium' for the native brand names or going with the third-party stuff that’s super fast but way bulkier. Here's what I noticed while shopping around:
- The native brand glass usually has way faster autofocus in the dark, which helped me miss fewer shots.
- The third-party options are basically half the price for more light, which is tempting if you're on a budget like I am.
- Size varies so much between the different manufacturers even for the same focal length!!! I eventually just grabbed a used lens from one of the main brands to keep things compact, but I'm still kinda questioning if I should've prioritized the extra aperture from those other guys instead. Is the AF difference really that big when it’s actually dark out??

So basically the consensus is that the GX9 is an absolute beast for street, but you highkey need that fast glass to survive the night! Tbh after years of shooting M4/3 in the dark, I've realized that keeping ur rig small is the most important thing for staying low-profile. The thread has already covered the main players—the compact primes from the big brands and the faster options from third parties like Sigma. If you want my experienced take, just go with any of the Sigma primes because they literally offer the best value for your budget right now, even if they're a bit bigger. But if size is ur absolute priority, honestly stick with the tiny primes from Panasonic... they sync perfectly with ur body and keep things super discrete. Just grab something fast and get out there, night street photography is seriously addictive!! gl!

Just saw this thread and had to jump in because I went through a massive trial and error phase with my GX9! One thing nobody really warns you about is how much the focus hunting can absolutely kill your battery when youre shooting in low light. If the lens is constantly searching for contrast in the dark, you'll be dead in an hour.

• Avoid the really cheap off-brand manual lenses unless you have focus peaking dialed in perfectly
• Stay away from heavy zooms even if they claim f/2.8, they just arent fast enough for night street work
• Be careful with some of the older screw-drive lenses because they make a ton of noise and ruin the stealth vibe I actually got so frustrated with my autofocus once that I spent a whole weekend building a custom wooden handgrip for my camera just to make it more comfortable for long nights. I ended up getting way more into the woodworking side of things than the actual photography for a while there. I was out in my garage until 3am sanding down walnut blocks just to get that perfect ergonomic fit. Anyway, definitely stick to the fast primes to save your sanity and your ISO!

I spent like three nights straight once just staring at MTF charts and T-stop data on sites like OpticalLimits before a rainy trip to Portland because I was so obsessed with finding the absolute best light transmission! It is seriously amazing how much the actual glass quality impacts the signal-to-noise ratio on these M4/3 sensors. I found that while one brand might lean towards that clinical, ultra-sharp rendering, another might prioritize micro-contrast and that specific 3D look, even if the lab stats look a bit messier. If you want to really nerd out on the specs, check these out:

• LensTip for the most insane resolution and coma tests
• Photons to Photos for checking how the GX9 sensor handles dynamic range at high ISOs
• Mirrorless Comparison for seeing the actual rendering differences between manufacturers side-by-side Just to narrow things down, are you prioritizing absolute corner-to-corner sharpness at the widest aperture, or do you care more about the soul and micro-contrast of the rendering? Also, are you checking for actual T-stop transmission values or just going by the f-number on the barrel?