Swift 8.5x44 ED
Posted 01 December 2003 - 03:48 PM
Posted 02 December 2003 - 12:00 AM
I use mine for daylight observing. For astronomy, I prefer at least 50mm objectives, and find 10 power provides the best FOV vs. penetration, for my eyes.
Posted 02 December 2003 - 08:52 AM
I was wondering about the qualitative differences, contrast etc. Between the ED and none ED versions of the Swift 8.5x44 Audubons?
Posted 02 December 2003 - 01:12 PM
With spotting scopes for example the upgrade to what is defined variously as ED /HD / or even APO seems to come into it's own at the higher available magnifications.
For hand -held astronomy I maintain that 8.5 x 44 is very significantly easier to hold steady than 10 x 50 and I am speaking as one who actually owns and uses the Swift 10 x 50 Kestrel Audubons on a regular basis , having used the 8.5 x 44s in the past.
Everyone is different , but I think the 10 x 50s are VERY GOOD for daylight terrestrial use whilst only GOOD for astro -use.
Of course what I define as "good" will probably come across as quite meaningless without a detailed summary of epic proportions , but it is a quite carefully measured statement.
I must concede though that the well -documented field curviture and softness at the edges IS more noticeable with the lower power versions , so if tripod mounted the 10 x 50s would be the better choice for more reason than one.
Just my opinion of course -- Kenny.
Posted 02 December 2003 - 05:05 PM
Posted 15 December 2003 - 12:12 AM
Here Barry Simon compares the Audubon ED to the Eagle Raptor (basically the same optics as the non-ED Audubon).
If you don't want to join Yahoo groups, email me and I'll send you a copy of the review.
Btw, Digital Photo and B & H Camera sell the EDs for $339, so that's only about $70 more than the non-ED version.