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Imperfect lenses?

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kesi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kesi Quote  Post ReplyReply Direct Link To This Post Topic: Imperfect lenses?
    Posted: October/25/2011 at 06:27

Hello, I have Hawke Sidewinder 30 6 Half-24x56 Mil-Dot and Hawke 30 Tactical 6.5-20x42.Glasses are very similar, at dusk they have similar performance, although Tac has a smaller lens. I have noticed defocusing on the edge of the visual field in both scopes, is it caused by imperfect (cheap) lens?

R.
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kesi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kesi Quote  Post ReplyReply Direct Link To This Post Posted: October/25/2011 at 11:35

Do you have similar experience with these or other scopes?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVT_Tactical Quote  Post ReplyReply Direct Link To This Post Posted: October/25/2011 at 11:45
I imagine it is from the cheaper glass
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dsr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dsr Quote  Post ReplyReply Direct Link To This Post Posted: October/26/2011 at 11:01

Yes your lens is imperfect but all lenses are even in the best optical systems are imperfect.  All optical systems are a compromise of conflicting requirements.  It is just that the best are much better optimized and their market price reflects it.

 

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dsr
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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: October/27/2011 at 17:52
Scope a design is a study in compromise.  With riflescopes, it is not uncommon to sacrifice some performance at the edge for better center field performance.  Besides, all scopes are built to a particular pricepoint.  That is why there are different pricepoints.

ILya
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kesi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kesi Quote  Post ReplyReply Direct Link To This Post Posted: November/01/2011 at 15:08
I understand and thank you for answer.
 
R.
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kesi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kesi Quote  Post ReplyReply Direct Link To This Post Posted: December/08/2011 at 06:41

I normally use lenspen for cleaning glass, but I'd like to ask if I could somehow damage the anti-reflection layer with compressed air?
http://penzo-zahradni-technika.cz/administrace/images/zbozi/velke/20110817_083107.png

 
I know it's a strange question, isn´t it? But for me it is important to know it.

 

kesi
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