Never know I might give 'em a go. I do see the globe effect in some bins & one riflescope, yet that doesn't imply that I would see it in every bin alleged to possess RB.
http://www.opticstalk.com/anyone-used-the-kowa-genesis-105x44-prominar-xd_topic36884.html
I had a 10.5x44 Genesis for a while too, about 3 years ago. The glass is fantastic, within a natsazz of anything made, but I have a tendency to see the dreaded "rolling ball" view, and it was noticeable in my pair of Genesis. They are extremely well built too.
http://www.birdforum.net/showthread.php?t=287315
Sadly, as much as I wanted to like the Kowas, especially given their outstanding strengths – small size, light weight, smooth focusing knob etc, there was one important area where they fell woefully short for me. Their weird distortion when panning – i.e. the dreaded rolling ball – was marginally north of borderline acceptable for me. True, it’s only a tiny bit worse than Swarovski’s 8x32SV. But while I could easily see this weakness in the latter, it wasn’t bad enough to bother me and I could easily live with them considering their other outstanding attributes. As much as I tried, I could only live with the Kowas if I only looked at stationary objects.
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http://www.birdforum.net/showthread.php?t=226304
Your BFF Brocknrollin'ball: contemplating buying a bin that is known to cause "rolling ball," such as a Nikon HGL, SV EL, Kowa Genesis, etc.
http://www.birdforum.net/showthread.php?t=336311
Kowa Genesis 8x33: Troubador's Review - BirdForum
www.birdforum.net › ... › Binoculars › Kowa
Dec 11, 2016 - I found panning to be quite free from rolling ball despite it being reported by some, but I seem to be one of those relatively unaffected by RB so those who suffer from it should check for this.
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Granted most are very old posts. Perhaps Kowa has tweaked their formula over the years. Hard to say w/o taking a peek.