Using odd lenses on Micro 4/3rds cameras

[kds315*]

Well, I have just finished some tests I made with Tevidons I have here and I can confirm the findings as mentioned by Sebastien (abazz). From about 25mm focal length onwards vignetting disappears, so the full set consisting of the focal lengths 10, 16, 25, 35, 50, 70, 100mm leaves out the 10+16mm versions, due to quite some vignetting (except someone likes that effect). The 25mm is borderline, so still some vignetting is visible but just in the corners (a nice useful effect at times); this disappears if the 16:9 format is being used. From 35mm onwards all vignetting has disappeared.

Tevidons are tack sharp and contrasty lenses once made in the former GDR by Carl Zeiss Jena (later sold to DOCTER OPTICS which continued making them; and still does btw.) as video lenses to protect their border safety, massively built (the first series) and in the later second series was built much lighter. They came in c-mount (rare) and a special bajonet mount to fit their vidicons. The spectral range is 400-1000nm fully achromatically (some say apochromatically) corrected (!!), so there is no focus shift, if these lenses are being used for IR photography in the 750-1000nm spectral band.

I have now found a way to convert these bajonet mount lenses to c-mount using a newly designed precision mount to make these usable for mft (micro 4/3) cameras. More about that later.

[dickb]

Klaus,

Have you tried your 18-90/2 Vario Tevidon on the GH1 as well?

[kds315*]

[Abbazz]

[Abbazz]

[kds315*]

Just some TEVIDON test pics taken at ugly + nasty weather fully open shot at infinity.
Full sensor format using Lumix GH1, just resized, no cropping or sharpening or contrast
enhancement applied - straight from the cam.

f=35mm


f=50mm


f=70mm

[Abbazz]

[Abbazz]

[kds315*]

Thanks Sebastien,

I should read manuals more I guess....

[Orio]

The Tevidon images seem excellent considering all the circumstances.

[lulalake]

Thanks so much for this thread. Wow!!!

Jules

[Abbazz]

[exaklaus]

Thank you for the new pictures.
The more I browse in this thread, the more do I want a Micro 4/3, too.
Might be useful as back-up body for vacaciones, too. Good excuse to get one... one day.

Klaus

[Abbazz]

[kds315*]

Great pictures indeed, thanks Sebastien!

That Kinic indeed shines whenever somthing is right centraly located in the middle of an image
so that swirly fuzzyness enhances that; with landscape shots or architectural etc., "flat"
subjects it is a different situation and I prefer more the rendering a Tevidon for instance will
give with high sharpnesss + contrast and flatfield over the whole image. I get a bit burnt out
if I see too many swirly images after another....

[kds315*]

Not really an "odd" lens, but the famous slim CZJ Biotar 1.5 7,5cm (75mm) red T on Lumix GH1, shot fully open:













and I also had the Kinic with me, perfect for that subject:

[Abbazz]

[kds315*]

Thanks Sebastien, well it is the one (my 2nd) I have for sale here on the forum and the proof that it delivers!!

[exaklaus]

[eooojj]

Here are some of my favorite shots from my 1week old C-mount gear.
GF1, Angenieux 25mm f0.95 (crop to 50mm in M43)

[img]http://farm5.static.flickr.com/4001/4278684253_84b3b168de.jpg
stealth street photography[/img]


my new playmobil photography model


indoor shot of cookie monster ride at shopping mall


colleague at cafe


flora shots near workplace....would love to shot more flora but need to find time[img][/img]

[Spotmatic]

[eooojj]

Hi Spotmatic,
Thanks, thats ingenious and very kind of you.
I feel so welcomed already!
Thanks again.
Cheers,
Ed Forrest

[eooojj]

stealth street photography

[rawhead]

Now that I have a GF1, I need to start looking into all these weird lenses Obviously, I'd kill for a nice f0.95 lens... if I could ever come across one... I am eyeing a Robot/CZJ Biotar 40/2 though. Anybody try one of those?

[kds315*]

I decided in favor of the Schneider 1.9/40mm Xenon for Robot, which is supposed to be the better lens