I posted this on a long range muzzleloading list where it may be more appropriate but I thought I would post here as well.  Perhaps there are some optics experts in the house.


Yesterday, I was killing time in a Scheels department store.  I noticed that they had a very compact Burris 2575 mirror lens spotting scope. I've never looked through a mirror lens scope so I thought I would take a peek on a hunch that they would have superior eye relief.    A self proclaimed "Palma F-Class" (whatever that means) guy waiting at the same counter told me it would not have any eye relief at all, but I chose not to listen to him.  Indeed, he was wrong.  It probably has the longest eye relief of any scope I have ever looked through.  

Is this common to all mirror lens scopes?

This particular scope is a cheapy $220 on Ebay (You need to Login or Register to view media files and links).

It weighs 33 oz and is 10" long.  

The 25-75 zoom is sorta ridiculous in some ways, but long range shooting has the least need for quality optics since seeing the spotting disk is simple with even the crummiest scope.  So, IF this scope will show mirage well, it might be a great help in Creedmoor matches where coaching is disallowed.  

Anyone have any thoughts about this particular scope or about mirror lenses in general?

Brent

Yes, I know they are old technology - pretty much all of the basic optics are - it's the details that are  modern.   

But anyway, does this style of scope necessarily result in longer eye relief?   

And do they show mirage as well as a say my Kowa?
Brent

Quote:


Maybe JoeB can answer that one, I double-dog-dare you to ask him! Maybe you can decipher his system....
Regards, Joe

Quote:


Uncle, Unnncle, UUUNNNNCCCCLLLLEEEE!!!!!

You win.   

Brent

Brent,

Eye relief has nothing do with the mechanics of a Newtonian lens arrangement.   (You need to Login or Register to view media files and links);

It is partly a function the exit pupil. (You need to Login or Register to view media files and links)

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Pete

Here ya go Brent.

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                                                                Joe.

Irascible wrote on Dec 31^st, 2007 at 2:24pm:


Nope

Here are a couple more of the same type of scope :
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Note that the eye relief is much greater than the Kowas etc.  Must be something to the design style having a longer eye relief than what we consider more conventional scopes.   

Brent