Home
SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

Carl Zeiss Jena Sonnar 200mm f/2.8 M42
View previous topic :: View next topic  


PostPosted: Tue Mar 20, 2007 7:24 pm    Post subject: Carl Zeiss Jena Sonnar 200mm f/2.8 M42 Reply with quote

Wide open shoot.



PostPosted: Tue Mar 20, 2007 11:53 pm    Post subject: Reply with quote

Attila, I notice a lot of CA in your samples, that I don't get from my copy.
I think you may have a bad copy of this lens.
I show you one of my most recent pictures with this lens:

Whole image resized:


A 100% crop from a defocused area (I badly misfocused on this shot because of the hurry):



direct:
http://img490.imageshack.us/img490/8820/czj2yf3.jpg

This is the small part of the picture that is in focus:


From my copy I get some CA in the corners when wide open, but it's as much as that - and not as bad as yours.


PostPosted: Tue Mar 20, 2007 11:59 pm    Post subject: Reply with quote

I think that is not CA, rather than other plants around the subject.

Same lens , same time.

What you think ?


PostPosted: Wed Mar 21, 2007 12:09 am    Post subject: Reply with quote

I see strong cyan CA around the blurred rocks, and strong red CA around the child's hand and the animal's nose and tongue.
Sorry Sad
It seems to have to do both with the frame position (edge, corner) and the focusing (blurred).
The central focused part with the animal is tack sharp.


PostPosted: Wed Mar 21, 2007 12:13 am    Post subject: Reply with quote

No problem I will survive Smile


PostPosted: Wed Mar 21, 2007 12:15 am    Post subject: Reply with quote

I tried to fix it with PT Lens (Photoshop), but it's too strong, when I cure it from one side of the tongue, it comes out of the other Sad


PostPosted: Wed Mar 21, 2007 12:23 am    Post subject: Reply with quote

No problem I like these pics even with CA, don't waste your time.


PostPosted: Wed Mar 21, 2007 8:12 am    Post subject: Reply with quote

*oops* I see nothing. No CA. Perhaps this is because I'm red-green blind. So I have to ask a maybe dump question: is this really noticable on these images? Or is this something specially regarded by you, Orio?

Michael