I have a Questar 3.5" on-loan, and as of right now I am on the fence as to whether I should test it using DPAC.
I don't want my last Classic bubble burst.
I've tested just about all the classic Japanese refractors, classic American reflectors, SCTs, Chinese Maks, even a Zeiss. A large majority of them have been at least a little disappointing, some shockingly disappointing. So-far, Swift remains at the top of the heap, with the most consistent high-quality objectives. I've tested 8 Swifts and there isn't a lemon in the bunch. The only other brand with consistently good test results is, surprisingly, Jaegers. Those are the only two brands that I would buy without testing the objective in advance, anymore.
Royal Astro? Unitron? Asahi? Nope. None come close to Swift and Jaegers for consistently good optics, based on my tested samples. The only two brands that I feel comfortable saying that you have a decent chance of getting a high-quality objective via the luck of the draw.
So, should I, or shouldn't I test the Questar 3.5"?