My humble experience (I own an Omegon Argus 25x100, and an APM 28x110 MS, which I believe is essentially identical to the Oberwerk):
- the Argus is much smaller, lighter, easier to carry and mount (in fact, it's possibly the lightest 25x100 currently on the market?)
- both are mechanically impeccable (I had to "collimate"= conditionally align the APM after it arrived, which was easy thanks to the help of colleagues here in the forum)
- due to my narrow IPD, I removed the rubber eyecups of the APM and use those of the Argus in the folded-down position in order to get an easier view of the full FOV
- optically, the APM outperforms the Argus in almost every aspect: sharpness, both central and off-axis; contrast; CA
- the APM is a big and heavy beast, but once mounted, you will get views e.g. of the moon that are outstanding for the price of that bino. Rupes recta is clearly visible in the APM (not in the Argus) which is good for a 28x (I am not an expert, but I have a few good other good instruments to compare, including Vixen BT, Docter Aspectem 40x80 and Kowa Highlander)
- the Argus has been reviewed here in another thread and found to be one of the best 25x100. Even if so, the APM is in my eyes optically still clearly better (for a price slightly below the Argus).
The only things that speak for the Argus in this comparison are: size and weight (again, this is my subjective view).
I believe that what I am saying here for the APM is equally true for the Oberwerk.
Pinac
Edited by Pinac, 28 August 2016 - 12:24 PM.