Saw this earlier but just now responding. Similar situation here

• I went through this last year when I was trying to slim down my kit. Tbh, I spent years shooting without filters because I was scared of the bulk. Ngl, I finally compared a few ways to go for my gear. NiSi M75 Filter Holder Kit vs Lee Filters 100mm Foundation Kit - 75mm Square: This is basically the perfect size for M4/3. I use it with my wide lenses and there is like zero vignetting. It feels balanced on the camera, which is huge when youre out in the field.
• 100mm Square: Honestly, this felt like overkill. Its much heavier and the filters are way more expensive. It works, but it feels like youre carrying gear meant for a full-frame tank. I also tested the Hoya PROND EX 1000 Filter as a screw-on. Its decent for a single layer, but stacking them caused some serious vignetting on my wider glass. I mean, I guess it depends on your needs, but the 75mm square stuff was the best middle ground for me. gl!

> I am specifically worried about color shifts and vignetting on wider glass. What brands or kits do you find work best for this system? yo! oh man, I feel u on this one. Honestly, when I first started with my Olympus setup, I tried to save some cash by getting a cheap generic brand screw-on kit and it was HORRIBLE. I was out at the coast trying to get those smooth water shots and everything came out with this nasty purple tint that I literally could NOT fix in Lightroom... it was so disappointing cuz I spent all day shooting for nothing. Anyway, for M4/3, i think 100mm square filters are basically way too big and bulky for our tiny lenses. Like, why have a compact system if youre gonna carry a huge filter box?? I ended up looking at the NiSi M75 Filter Holder System and its been a game changer for me. It uses 75mm filters which fits the smaller glass perfectly without being a huge weight in my bag. If you really want to save money tho, you could look at a magnetic set like the Kase Wolverine Magnetic Circular Filters. They are so much faster than screw-ons, but yeah, you gotta be careful about vignetting if you stack too many on something wide like the Olympus M.Zuiko Digital ED 7-14mm f/2.8 PRO lens. basically, my lesson was that cheap glass ruins expensive cameras. I wasted like $60 on those bad ones before just buying the Haida M7 Filter Holder Kit. If you go with something like the NiSi 75x80mm Nano IR ND1000 10-Stop Filter, the color is actually super neutral compared to the cheap stuff I started with. Id say start with one good 10-stop and maybe a 6-stop and see how you like the workflow before buying a whole kit... hope that helps!! cheers

Re: "Saw this earlier but just now responding. Similar..." - adding my two cents because I spent way too much on gear that just didn't work for my workflow. Unfortunately, I had a pretty rough time trying to find a system that didn't feel like total overkill for my Olympus. I actually bought a massive 100mm kit thinking it was the pro way to go, but it was just so clunky for hiking and honestly a waste of money for these smaller lenses. If you want to stay safe and save some cash, here is what I ended up doing after some trial and error:

• Buy one high-quality large screw-on filter like the Breakthrough Photography X4 ND 6-Stop Filter in 77mm and just use cheap step-up rings. It prevents vignetting on wide glass and is way more reliable than cheap square kits.
• I also tried the Cokin P Series Filter System but the color shift was pretty bad... everything looked way too magenta for my taste, not as good as expected at all.
• For a solid middle-ground, the Urth Filter Kit Plus+ has been surprisingly decent for the price. It is not as perfect as the top-tier glass, but way better than the generic junk you see on Amazon. Dont make the same mistake I did by over-investing in bulky glass. Keep it light, thats basically why we shoot M4/3 anyway right? Let me know if you need help figuring out which step-up ring sizes you need for your specific lenses, happy to check my notes.