it's 14mm and 20 are basically the same lens other than speed and focal length???

LOL :-)

Btw, very good Sony converter suitable for 14mm already exist and easy to get.

@Rambo i think it has to do 20mm has focus barrel relaying on motor(gear) the adapter weight is 75g not much but ... We will have to wait and than can test even on 20mm if it works :-)

I have shot with the Kowa TV lens 17-102mm f2, and currently own the Canon TV16 25-100mm f1.8. While C mount lenses hold a certain novelty, all of them were designed for SD or analog technology, so don't expect the same tack sharpness that digital lenses can produce.

The softness, especially when the lens is wide open, however does attenuate the harshness of HD, and can give that elusive film look that all of us try to create - visuals that are defined yet not brutally sharp. Having said that, it's also easy to confuse "out of focus" on these lenses for that film look!

Olympus 12mm f/2 is not cheap but a very fast AF lens and still small and light.

I've tried the Olympus 12-60mm. Excellent lens especially at wide 12mm. Take an olympus or panasonic adapter, I'm not so happy with the chinese one. The autofocus is very slow and not accurate. Very good for manual focus but with a follow focus gear. The lens is heavy and difficult to handle on bare hands without support. I wish for panasonic to produce the same lens but for m/43 mount. That's all.

I don't see many needing this wide of a lens or fisheye for that matter, but this is the widest C mount I have seen, fast F1.4, its a 1.4mm 1/2" c mount (ext tele should have full coverage), 185 degree viewing angle , you can set the camera on the ground back down - lens up, and see everything around it.. "for use with cameras up to 5 megapixels".. so optics should be OK quality.. obviously distorted to extreme fisheye levels

I can see a few uses for it like, Googles street view car type projects.. 360 degree home interactive tours or seeing the entire sky at one time for star watchers.. someone may have a use for it.. but I don't have one..

Specs on B&H http://www.bhphotovideo.com/c/product/404279-REG/Fujinon_FE185C046HA1_FE185C046HA_1_1_2_1_4mm_F1_4.html

Lowres video sample of the viewing angle used for star watching.

They use these lenses on this camera setup, has some sample stills and descriptions of interest http://www.company7.com/sbig/products/allsky.html

@rozroz, attached is a still of the 3.5mm f1.6 rainbow CCTV on a low bitrate GH2 in ext-tele mode, gives you a idea of how wide it is.. but took some major mods to make it work, I'd recommend the 4-12mm Tamron f1.2, far easier to get fit properly. About the same wideness, and can be lessened if you don't like it quite that wide, and it is faster lessening grain from ext tele if that's a concern.. The Tamron looks scary for how deep it goes in the body, but will not touch the sensor.

@apriori You could get one of these: http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=120665273896 You have to cut away a little at the front (it's plastic), otherwise it vignettes, but way cheaper then the original lens hood.

the Rainbow is a prime lens , no zoom, and yes the Tameron is varifocal so no zooming in shot with that. doubt you going to find anything wider than the kit lens at 14mm, that is para focal and wide, and tele zoom, short of a very wide B4 ENG lens and adapter.. like a 4.5-50mm with doubler ENG lens and B4 to Micro43 adapter..

I do have a 8-48mm f1.0 Rainbow in Ext-tele its not all that wide compaired to the tameron or rainbow 3.5.. but it is para focal and fast but gets soft at f1.0, so you need to run about f1.5 for a not soft image. Also have the Pentax 8-48mm F1.0 but have not converted it yet for Micro43.. Videos do exist for both these 8-48mm c-mounts.

Rainbow 8-48mm.. 1/2" cctv , the video shows how to mod it to fit properly and how to adjust infinity focus and then sample shots from it. As for etc tele, one advantage to etc mode.. less if not any jellovision, downfall is added grain noise due to bigger pixels compared to the size of sensor area.. but if your shooting at low iso, like under 400 you should be fine. CCTV lenses are about moding and making them work depending on the lens.. You can't find a lens as fast as the Tamron 4-12mm for the GH2 for $89.00.. great value for a nice wide fast lens... If I carry a small kit with me, that 4-12mm is part of it, it is a must have in my book, next to my 20mm 1.7 Lumix and a 50mm 1.4

The Rainbow is a nice all around fast lens, but soft at f1.0 I usualy never go past 1.5 unless i need a shot really bad and its a get it or forget it type situation, like just random shooting stuff as it happens in really low light.. you could do better in a non CCTV lens but not for $50 or even 10x that.. that is what I bought my rainbow 8-48mm for, new in the box on ebay.. just kept my eye out for it and stumbled apon it one day BuyItNow price.. sold.

@Ebacherville, i'm terribly sorry. somehow i missed your footage section when i watched it a few days ago :( forgive me. excellent tests!

so you say you have to stay above f1.5, right? but still, in most of the shots the frame is only focused at the center area.. is there a way of improving the overall focus area?

@apriori Do you find the sharpness of the 12mm pleasant when you shoot "busy", detailed scenes?

@Kihlian, for CCTV lensesl I generally don't go below a 1/2" lens.. never tried a 1/3" lens, some may work but I suspect most will show vignetting.. but never really tried any 1/3"

@rosror, I'm not sure what your asking, that footage isn't from me its someone elses footage.. If you like I can shoot any tests your like with the CCTV lenses I have. The rainbow 11.5-69 is a 2/3" lens and covers way more than the exetele coverage. the 1/2" 8-48mm may have a bit of edge or corner distortion, bit very minor, I have always wanted a b4 2/3" lens setup on the GH2 but the edge distortion onthese with the 2x doubler engaged has always killed that dream for me, these c mounts have done a better job of that, the only reason I use C mounts is if I can't pull off the shot needed in full frame.. Generally if its a parafocal fast zoom from tight to wide or need or a super wide low light shot, I'll be using primes in full frame most of the time. Tell me what you want to see in the c mounts and ill try to shoot it for you.

I also have a Pentax 8-48mm f1.0 but need to get a machinist involved for the modifications to it to make it usable.

I think I'll make a demo video of the C mounts I have.. They are great for specitly shots you just cant pull off with regular full frame lenses. Genera for those shots, the stuff I just cant do in full frame is when I pull out the CCTV C mounts.