G1 compatible Tevidons?

[no-X]

Is there any list of Panasonic G1 compatible C-mount Tevidons? I read, that only some of them can be used with adapter and achieve infinity. I've just bought these three:

Tevidon 10/2
Tevidon 16/1.8
Tevidon 25/1.4

[Attila]

I think trouble is it draw smaller circle than what you need to fill frame fully.

[dickb]

There appear to be two problems with c-mount lenses on the G1. First of, to get infinity focus the lens has to be recessed slightly into the camera mount. Adapters allowing you to do that have a limited diameter. If your c-mount lens is too fat, it won't fit the adapter.

Secondly, the coverage of the Tevidons may be smaller than the G1's sensor size. Examples of pictures from the 25/1.4 show dark corners in 4/3 size:

http://www.flickr.com/photos/phobus/3332901755/

On a few eBay auctions they only show 16:9 pictures, no dark corners there.

My guess is than focal lengths shorter than 25mm have even smaller image circles. I have some Tevidons (bayonet type) lying around somewhere but I'm too lazy to compare image circles right now.

[kds315*]

made some tests long ago, APS sensor work from 75mm onwards if I remeber correctly. I have them all from 10mm onwards. Nice glass and very sharp but not much used....

[no-X]

Thank you.

[yalcinaydin]

I've bought a Canon 11-110/1.6 with Volna-3 for just 30Euros from a local guy just incase of a future micro-4/3 purchase and especially for Hi-Def video shooting

[rawhead]

[kds315*]

[rawhead]

[kds315*]

I re-tested the TEVIDONS (all I guess ever made) for usebility on micro 4/3 cameras and the conclusion is:
a) vignetting: 10/16mm
b) minimal vignetting: 25mm
c) no vignetting: 35/50/70/100mm

all tested in full format on a Lumix GH1.

reducing the format or cutting out would of course make group a) also useful,
or switching on the internal 2x magnification also helps.

[dickb]

Klaus,

I can't resist - all you guess ever made. Have you tried the 15-150/2 Vario Tevidon? It appears to have a decent image circle in the telephoto range, with a much larger rear element than the 18-90/2. Maybe I should get a micro 4/3 camera myself to test the lens..

[kds315*]

I have refused to do so since I know someone who has one and reports
of severe vignetting similar to the 18-90mm.

[dickb]

I'm surprised - with a 25 mm diameter rear element I expected much less in the way of vignetting than the 18-90/2 with its 15 mm rear element. Some quick and very dirty testing indicates an image circle of about 23 mm at 150/2 and about 20 mm at 15/2. Anyway, for a go anywhere travel zoom the 15-150/2 might not be the ideal candidate - it's a heavy monster.

[kds315*]

Well, if I run across one, I can do my own tests and not rely on someone else, anyway always better...