That is also true,When you start to push magnification,all the errors that can pass for good in an 8x or 10X instrument really start showing..But for the magnifications achieved by a scope,specially a small,short focal length,It should no be that hard to keep the relatively low Magnification under control...
Glass is what gets expensive,..an 80mm ED lens is pricey,..
I dont know if you remember an article in BVD called "How big a scope a birder needs",..In that article the Author is questioning if,with all the quality 65mm scopes available,the need for a larger lens,was vital for most uses...After using a small, ED ,high quality 50mm scope (nikon ED50),I am more convinced that aperture is not the only factor in brightness!!!!,,Just like the SE8x32 can make seem dim larger binoculars,a good 50mm scope can really do the job of keeping with magnification..using less precious glass!!!
1 grand for an alpha scope 65mm would be a good price,BUT STILL A LOT OF MONEY,As a matter of fact You can buy REALLY GOOD SCOPES today for quite less than that(and if made your mind to put 1000$ in a scope you can get pretty much go Alpha in the used market ,for about that much.).I think the Mystery of the ZEN ED series is that they are Not too expensive