So I managed to drill 3 holes into the c mount adapter, but one hole was off so only 2 screws fit in. Still feels pretty tight on. To get the adapter to go on the GH2 completely you need to grind down the metal so the small screw heads don't stick out and get caught. That takes careful grinding. If I had to do this again, I would use a table drill and clamps to get better results...maybe even get better measuring tools so all holes will match up. Pictures to come!

@fosterchen

More and more modifications. This is interesting but what's the purpose of the drilled holes? How does making the adaptor hug the camera snugly help in yr work? I had this canon lens as well, my frustration was that it became a varifocal lens on the GH2, meaning whenever i zoomed in or out, the focus changed. I know of pp who have successfully made such lenses parfocal, but it takes time and money. Given that c mounts are not the easiest glass to use on m4/3, with all the modification which can be a hassle, I think it's more expedient to go for full frame 35mm glass.

One clarification though: c mount glass built for one inch sensors are fantastic on GH2. Check out the Navitar 75mm, or Cosmicar.

The holes are for the 3 screws that hold the adapter to the lens housing, otherwise the whole thing would fall out. The original metal ring on the Rainbow H6x8II lens is what's keeping the c mount part on the lens. The H6x8 plastic version has a plastic piece instead of metal. Please watch the vimeo video that details this so you can get an idea. If I have time I'll see about making my own video.

Can anyone provide a list of C-mount lenses that work with GH2 , full image, not ETC ?

I know of at least one (because I own it): the Fujian 35mm. Fun, funky lens. No vignetting (but heavily blurred at the edges--which is why you buy it).

The Fujian 35mm is OK for shallow DOF shots, not wide shots. Closed down it's gets sharper at the edges.

One of the best C-mounts I've seen is the Fujinan 12mm f1.4: Video by Geopaca I'm not sure if vignettes in video mode but It can be modified for full 4:3 coverage.

Ok, I'm unclear on several things.

1. GH2 EX Tele Crop Factor FOV equivalent to fullframe: is it really only 2.6X FOV compared to full frame, or is it more? by this, a 20mm lens would be 52mm equiv. FOV (as opposed to 40mm equiv. on whole GH2 frame)?

2. Which lenses work in EX Tele mode with full coverage? 1"? 2/3"? 1/2"? 1/3"?

Rainbow H6x8 II Zoom Lens on GH2 - Parfocal Test

Rainbow S6x11 Zoom Lens on GH2 - Parfocal Test

@jleo

Thank you. This was the first test of the very small Xenoplan. I was surprised by the quality of that lens: sharp and very little flare when there is a strong light in the scene.

@rozroz, I guess maybe it just felt cheap to me because it is the plastic version, and since I actually took apart the H6x8-II entirely, I feel like I know it better as a lens and all its parts.

The S6x11 was harder to adjust the back focus, for some reason the only way i could adjust it after loosening the collimation screw was to pry the whole part back and forth with a flat head screwdriver until it seemed in focus...don't know if I have a faulty lens or I'm missing parts. Anyhow, I got it to focus, so I'm not touching that anymore!

haha no more c mounts for me.

@rozroz

Notice i didn't say no more poor people for me.

Have you tried out c mounts extensively? If you have, like me, then you would have arrived at similar conclusions, and that is, if you want proper cinematography with a GH2, you're better off using SLR lenses. My decision is informed and personal. I am not casting aspersions on anything or anyone, just learning from the blooming mistakes I made arising from bad investments in quite alot of c mount lenses.

Will a c mount lens designed for 2/3" sensors work on a GH2 without the use of ETC mode? I was looking to buy cctv zoom lenses that might work with a GH2 without sacrificing the distance. Also looking for affordable 2/3' or 1" size zoom lenses that have decent quality without modifying for GH2.