Alexis, I read your comments and others in that thread. People seemed to ignore Henry's comment, which I thought very interesting.
As Joachim says changing to a more expensive scope does not necessarily mean upgrading to a better one. Optically, the very best birding scope I've yet seen was a specimen of the Nikon 82mm Monarch ED I tested recently. It cost exactly the same as your Vortex Razor, but per mm of aperture it outperfomed all of the high end scopes I've tested from Kowa, Swarovski or Zeiss. I hope to post a review in the next week or two.
I haven't seen the new Vortex Razor, but I have tested two of its Kamakura made siblings: The Zeiss Gavia and Brunton Icon, both reviewed here. Those have some serious optical design problems which the Vortex possibly shares, but I don't think even a poor sample of the Nikon would have. Unfortunately I would be surprised if every Monarch ED is as good as the one I tested, but just finding one unit that good means the design is not a limitation.
Henry
I for one am curious to hear more from Henry about this.
I went looking at the Monarch ED82A and found Nikon up to their old tricks, unfortunately.
One can only buy these scopes with their standard 20-60 zoom. They offer a higher quality wide angle zoom, like most of the premium makers do these days, for roughly $550. Because the scopes cannot be purchased w/o the std zoom one is forced to buy/pay for something they don't want if another EP is preferred.
The resale market for the std zoom will be nil because everyone will already have it. Nikon should offer these scopes body only or bundled with one of the other EPs. They've done this kind of silliness before and Nikon marketing continues to fail in some respects IMO.
So by the time one buys the Monarch $1600 and adds the cool zoom EP $550 one is into it for $2150. I wound up buying the Kowa 883 bundled with their 25-60 (TE-11WZ) for $2420. That's only $270 difference and one gets another 6mm of aperture, a real fluorite element in the objective, an even better zoom EP, access to a more complete system, and (for me anyway) a better focusing system.
Back to the topic though.
I'll delve into my usual bag of tricks to evaluate the Kowa for digiscoping with an iPhone, an APS Fuji, and Canon SLR.
I'll write of my findings.