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Some questions to Zeiss Jena 300mm F4
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PostPosted: Sun May 31, 2015 4:30 pm    Post subject: Some questions to Zeiss Jena 300mm F4 Reply with quote

Hi there,

I just got a Jena 300 (with a shipping back waranty):

1.) It has some cleaning marks on the front Element and very tiny on the back
element; does this affect IQ?

2.) It already had a M42 mount on it, but I can't remove it. Was there a P6
and a M42 Version or should I be able to remove the adapter?

Thanks for your help!



PostPosted: Sun May 31, 2015 5:56 pm    Post subject: Reply with quote

That is the P6 version with adapter. Turn the ring following the arrow.

Good luck!


PostPosted: Sun May 31, 2015 8:05 pm    Post subject: Reply with quote

Worked! Thanks.

How about the cleaning marks?


PostPosted: Sun May 31, 2015 9:34 pm    Post subject: Reply with quote

Nightjar wrote:
Worked! Thanks.

How about the cleaning marks?


depends on cleaning marks. slight cleaning marks shouldn't affect performance. pronounced marks can cause softness