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gmazza
super member
Reged: 03/10/09
Posts: 102
Loc: RS, Brazil, 29S 51W
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Re: ED glass in binoculars
07/02/09 11:06 AM
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Quote:
CA is not much of a problem for astronomical use of typical small through medium large binoculars, and doesn't warrant expensive "solutions".
I think this is one reason of the previous shifting of opinions to daytime use. The kind of CA discussed is more noticeable at:
1. high magnifications
2. Astrphotography
3. lateral CA.
Astronomy binoculars are low magnification, not used for astrophotography, this left only the lateral CA for discussion.
Lateral CA is more a issue in Miky Way scan, it is almost negligible in steady, framed objects at such low magnifications.
We could even speculate about the use of doublers, thus increasing magnification and making the aberrations more noticeable, if the ED models are more resistant to boosted magnification or not, but in daily practice, and even more in astronomy, I have seen very few reports of doubler use.
-------------------- Oberwerk Ultra 10X50
Garrett Signature 15X85
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