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- Posts: 24461
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
Yea i learned pretty quick that all modern scopes are russian roulette for blue light/
I have a 60 year old 60mm f/16 and its phenomenal in the blue / violet with its standardized and simple magnesium fluoride coating. I guess when people started to complain about purple / blue fringe in the late 90's all companies opted simultaneously to entirely kill it off.
I dont think anybody realized that blue light was so valuable for imaging. The blue fringe is a must have for venus!
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