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Please explain coatings/ How is Barska

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martin3175 View Drop Down
Optics Master Extraordinaire
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Post Options Post Options   Thanks (0) Thanks(0)   Quote martin3175 Quote  Post ReplyReply Direct Link To This Post Posted: December/19/2008 at 19:19
Still laughing at the "barfska" comment --good one
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hunter12345 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hunter12345 Quote  Post ReplyReply Direct Link To This Post Posted: December/20/2008 at 20:39
Barska has been a very popular scope that sells well in the larger sporting good stores and on line.My scope was bought last year and placed on top a Rossi single shot .223 rem.Clear and bright scope when theres plenty of sunlight.When turning up the power the image gets blurry and when it starts getting dark the scope is useless.A cheap scope on a cheap rifle.I would never buy another and the reason I have the scope was that the salesman gave me this scope as a package deal with the gun. 
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cccombo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cccombo Quote  Post ReplyReply Direct Link To This Post Posted: December/21/2008 at 02:04
The coating dosen't matter if the glass sux
-1 for barfska
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: December/22/2008 at 09:07
Not exactly true.  A high quality coating on a lower quality glass will still improve its light transmission qualities.  (The coatings reduce the reflection of light.)  However that will not significantly impact image distortion due to poorer quality glass, other than giving a brighter fuzzy (or otherwise maligned) image.  The "best" coatings are very expensive, but a "good" multi-coating on moderate quality glass can lead to an initial appearance that the scope is better than it really is.  The improved light transmission will provide an appearance of better glass at shorter ranges, but increase the range and move into low light situations, and the glass quality will become apparent. Impurities in the lower grade glasses have a big impact on resolution.  Then, the quality of the lens grinding and polishing processes also has an impact.  A poorly formed lens will create all sorts of distortion problems, even in very high quality glass.  
In short, the coating does matter, but there are a number of factors, all of which must be accounted for and brought to their maximum potential, in the production of a quality optic.  That is why it is important to really spend time with a scope before deciding whether it suits a particular purpose and if it is "as advertised".  Even the best builders, though not commonly, sometimes make mistakes.  
Opinion,untempered by fact,is ignorance.

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