I picked up one of these and have been sharing some things over on bird forum. Here's just some copy paste from the threads if anyone is interested:
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I just received a Nikon Monarch 82ED 20x-60x and the 30x-60x wide. I'd like to test it out for my own understanding and to get some more data points out there for everyone.
I'll update this post with the tests as I do them. I havent done this before so feel free to chime in with pointers.
(UPDATE)
Star Test w/ 30x-60x Wide
I took it out and focused on a star and then unfocused it both high and low. Both sides of focus produce a perfect circle with an outside border with several smaller rings insed. Based on a couple articles I read, I do not see any astigmatism or mixed abberations. I didnt understand the examples for spherical abberations so cant comment on those at this time. Disclaimer: Its currently a full moon and I can only see the sky in the moon's direction due to mountains. I also had LASIC a few months ago and still get some "haloing" effect from light sources when its dark, if anything, its better than what im seeing. Im not sure how to interpret these results so any insight would be helpful
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Hi,
congratulations to your new scope!
Regarding the star test - perfect circles are good - so we can rule out astigmatism, coma and some higher order variants of those...
Spherical aberration and zones will show themselves with different round and concentric diffraction patterns inside and outside of focus (by the same amount).
They all tend to bring more energy away from the center which will result in blurry stars even at "best" focus in bad cases...
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Jring, Thanks for that, Ill take another look tonight.
Since I wont be getting my hands on an "official" resolution chart I figured I could do a comparison with a low tech print out one as long as the scopes were being tested under the same conditions.
I printed out an USAF resolution chart, grabbed my Nikon scope & 30x/60x eyepiece and headed down to Cabelas where they had an ATX 85 and 95 in stock.
I set up the chart about 40-50 yards across the store in a more dimly lit area and put the ATX 95mm and Nikon Monarch 82ed on tripods. This test was pretty easy, the 95mm was brighter and had better resolution than the 82ed, hands down. I wasnt really surprised by this with the larger objective.
I then swapped out the 95mm with the ATX 85mm for a more apples to apples test. This was interesting, I prob spent an hour looking back and forth through these two scopes at the resolution chart and I landed on they seemed to be exactly the same to me. If one did happen to look better than the other it was usually because it was the first one I had looked through after resting my eyes. The winner would swap the next time I rested and started with the other scope. I also asked 2 employees and 1 customer to take a look for their opinions and 2 people said they couldnt tell the difference while 1 said he thought the swaro was fractionally better.
As far as image I think they are tied, however, I still think the Swaro is the better overall scope. All testing was done at 60x.
The Swaro has
1. Lighter weight
2. Wider field of view
3. Better eye relief
4. I liked the feel of the focus better, seemed a bit easier to "tune" the focus
5. The eyepiece cover stays on better (This is a pet peeve of mine)
The price difference between these is around 2k. Personally, the list of items above doesnt warrant buying the 85mm over the 82ed. It also doesnt seem that surprising that we are seeing similar performance at lower price points now. The ATX has been around close to a decade...technology becomes cheaper with time and other companies will be able to undercut you on price. If Swaro doesnt find a way to increase optic tech beyond the ATX series I imagine we will see several other companies catch up to them and at lower price points.
Personally, I probably should have never looked through ATX 95mm because I am now considering returning the Nikon and getting that. I wouldn't do it for the 85mm though.