A belated input to this thread-
Here is my review of a Celestron I bought a while back
http://bioacoustics.cse.unsw.edu.au/archives/html/birding-aus/2006-02/msg004
91.html
Colin Driscoll
-----Original Message-----
From:
On Behalf Of Peter Shute
Sent: Friday, 28 September 2007 9:36 AM
To: Alistair McKeough
Cc: Ricki Coughlan;
Subject: [!! SPAM] RE: [Birding-Aus] RFI spotting scopes
Thanks, that's a very informative answer. Now one more question for the
list:
- What size? This page:
http://betterviewdesired.com/How-Much-Scope-Does-A-Birder-Really-Need.ph
p
seems to be saying that 60mm is enough most of the time (last paragraph).
Peter Shute
-----Original Message-----
From: Alistair McKeough
Sent: Thursday, 27 September 2007 3:54 PM
To: Peter Shute
Cc: Ricki Coughlan; Dave Torr;
Subject: Re: [Birding-Aus] RFI spotting scopes
$500 or $1000 probably makes a difference in being able to make the
ID.
$1500 or $3000 probably just means a better view.
On 27/09/2007, Peter Shute <> wrote:
There are some interesting pages about scopes on the Olivon
website. At:
http://www.olivonoptics.com/index.asp?PageAction=Custom&ID=12
they say:
"From $200 to $2000, each time you double the retail price
of a spotting
scope you can expect about a 10-15% improvement in optical
performance."
That would be US dollars, I guess. Applying that formula, a
$400 scope
would be 15% better than a $200 scope, $800 would be 32%
better, and
$1600 would be 52% better.
A lot of money for only a 52% improvement. Any comments?
No, they don't define "optical performance".
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