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What is difference of HD glass (1 Viewer)

garrickw

Member
I noticed some of the scopes advertised are HD glass the scope i just purchased is not is there a big difference I have a Vortex 20-60 zoom by80
would this be a good scope to digi scope with?
 
Do you have the basic non HD Viper model? Even that model still uses a type of low dispersion glass so I should think it would be fine for photography. Scopes that don't use any type of low dispersion glass tend to show a lot of aberrations like blue/red color halos around high contrast areas. Scopes that use any type of low dispersion glass tend to be better corrected for this. There's different types of low dispersion glass and some are better corrected than others.

Paul.
 
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