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Complete list of Helios lenses - getting closer
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PostPosted: Wed Aug 12, 2020 8:40 pm    Post subject: Reply with quote

You can find an explaination here (use google translate if needed) : http://piskunoff.blogspot.com/2017/03/blog-post.html


PostPosted: Wed Aug 12, 2020 9:23 pm    Post subject: Reply with quote

cbass wrote:
Does anyone know what this means?

Color Formula

Just the incorrect translation for what is called "color contribution index" (CCI)


PostPosted: Wed Aug 12, 2020 10:12 pm    Post subject: Reply with quote

Thanks. I have a better understanding now, but I still have no reference.

I see two splits above: 10-0-1.5 and 11-0-0

How would the colors be different between 10-0-1.5 and 11-0-0?

The article calls 11-0-0 a rational fall and 11-0-1.5 almost perfect.

The post also says (translated): "However, the "golden mean" is a lot of lens optics of the old school without MC enlightenment."

Does that mean the single coated optics have better color? What is the golden mean?


PostPosted: Thu Aug 13, 2020 12:11 am    Post subject: Reply with quote

No, single coated lenses don't have better colour.

Golden mean: https://en.wikipedia.org/wiki/Golden_mean_(philosophy)

Quote:
"the golden mean or golden middle way is the desirable middle between two extremes, one of excess and the other of deficiency."