You asked about optical tests and I'm not "hung up" on either strehl ratios or interferometry, particularly on a sample size of one. I leave that you. And, like you say, we agree to disagree...
You mentioned Strehl, I think perhaps twice - a Strehl value would mean little to most folks and is probably not as relevant to a low power widefield instrument. I specifically did not mention ANY particular optical test - just that the "review" would have meant more to if something was done - even a star test. Photography is a poor arbiter of optical quality. As Jeff B. said above - astigmatism, collimation and spherical estimates are what really matters here (especially astigmatism and collimation).
We are getting a little far afield here - my premise is that I don't consider this a "review" without more information. It is, however, a very nice product demo showing results that can be expected when using the product. I am starting to see that others (you?) have lower expectations of product reviews. I like mine to contain more information to help me drive a potential purchase. Unfortunately, most don't.
I have met Ed Ting, he is a terrific guy, wonderful speaker and an incredibly well-rounded individual. My StarMaster Oak Classic that I fully restored is mentioned in a snippet he did on the Black Forest Star Party when he was the keynote speaker some years back. So, I'm a big fan of Ed Ting. However, I take his website and videos for what they are, which is very useful product demonstrations and an interesting diary of personal experiences with a lot of varying astronomical equipment.
Thanks and best regards.
Edited by peleuba, 31 August 2020 - 11:18 AM.