C/y 35-70 thread
/forum/topic/862783/49

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mMontag
Registered: Dec 15, 2008
Total Posts: 1966
Country: United States

Most owners of this lens are happy with it and tend to hold onto them - I for one - highly recommended.

Originally produced by Zeiss for Contax - some of these lenses have been "converted" using an after market Leitax adapter to Nikon, Sony, Canon & etc mounts. You can also use a simple AF confirm adapter from E-bay.

http://www.ebay.com/itm/Contax-Vario-Sonnar-35-70mm-F-3-4-MMJ-Lens-EX-/280738664275?pt=Camera_Lenses&hash=item415d540f53

http://www.leitax.com/Zeiss-Contax-lenses-for-Canon-cameras.html

http://www.ebay.com/itm/Contax-Yashica-Canon-Adapter-AF-Confirm-OPTIX-V5-/120745596206?pt=LH_DefaultDomain_0&hash=item1c1cff952e

Krosavcheg
Registered: Apr 10, 2006
Total Posts: 2081
Country: Japan

Shooting a set with a model last night. Simple one strobe off camera setup. Noticed this morning a strange artefact (shot in portrait mode 90CCW rotation, so must be bottom line):

100% crop

Scanlines

Hmm..also shot 21/2.8, Rokkor58 and Mamiya 85/1.9 that night, but can't see anything similar in other shots. Must be the flash attribute...

This particular is shot at 5.6, I recall...

FlyPenFly
Registered: Feb 14, 2011
Total Posts: 4691
Country: United States

Looks like a recording or processing error.

Krosavcheg
Registered: Apr 10, 2006
Total Posts: 2081
Country: Japan

certainly looks like! perhaps time to retire my CF card..

Krosavcheg
Registered: Apr 10, 2006
Total Posts: 2081
Country: Japan

Just checked few random shots...this is only present in 35-70 shots with off camera flash.

mirkoc
Registered: Jan 26, 2008
Total Posts: 550
Country: Croatia

Krosavcheg wrote:
Just checked few random shots...this is only present in 35-70 shots with off camera flash.
How do you trigger your off camera flash? Some remote flash triggers are known to interfere with 5D.

Krosavcheg
Registered: Apr 10, 2006
Total Posts: 2081
Country: Japan

Mirkoc: That is absolutely correct. I use Cactus V4 right now.
Afaik, interference shows at 1/200-250s range and was a well known issue.
This is really weird - I shot a set before with 35-70 and remote trigger and didn't see a hint of this artefact...
But I am inclined to believe that this is indeed a trigger issue. Will have to shoot a bunch of test shots again..

Krosavcheg
Registered: Apr 10, 2006
Total Posts: 2081
Country: Japan

Upon closer examination, it appears to be signal interference. Not much to do except to shield the trigger best I can..

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