I got this new TLR, it's a Seagull GC-104. There's no thread size printed inside the lens cap like usual, so I looked in the manual, and the english-translated part says this: "Can be provided with a lens hood and filter. The connector sizes of them are as follows: M34x0.5 thread type, or ø 36mm slip on type." Can anyone make sense of that? I want to get a step-up ring so I can use my "screw-on" filters with this. Since I don't think(?) it would be called the "slip on type," I assume the important number here is M34x0.5, which I have never seen before. Would this be 34mm do you think? Thanks!