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Lens coatings

dagata

New Member
Anybody know what the deal is with some of the G lenses when it comes to coatings? I've had 2 45's with a reddish hue over the rear element--and I'd swear that this warmed up highlights on me. Same with a 28 and a 35. 28 I'm currently using has no reddish hue, but is more neutral. Once on e-bay, I saw a 28 being sold and a remark that it was one of the ones with the reddish coating. Anybody have any idea about this?
 
S

stefan_irmler

Hi Dino,

different coating colours on the same typ of lenses are quite usual. In the C/Y System for ex&le, there were several colours on the Sonnar 2.8/135 over the years. I possess three different coatings on my three Sonnar 2,8/85 AE Germany. All give beautiful pictures of the same colour.

Mr. Beder from Zeiss Germany told me:
this is not because of different recipes, or the need of differnt glas meltings, but the produktion tolerance of the process with the thin multi layer T* coating. The human eye can detect little differences in the coating films long before there is an effect on the picture.

regards, Stefan Irmler
 
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