If you have constructive comments or questions on that topic
Actually, my agenda is constructive.
With sensors that have smaller and smaller pixels, such problems in sharpness that come from a misaligned primary can be noticed in imaging.
I guess that, if customers do not complain, then there is no reason why a manufacturer, who seems only to be commited to cost slashing, would even buy an optical bench and do tests.
I pointed out a dealer in germany who tests scopes on a bench before delivery.
Others have pointed out dealers from the US who test optics with interferometry before delivery.
I think that is constructive.
If no one complains, then this will simply continue and they will make scopes like this:
JUST PLAIN DUMB someone at Meade Instruments labeled one side of the OTA correctly LX-200 ACF, the other side LX-90 ACF. Images taken by Company Seven
after failed acceptance evaluation of this new Meade 12 inch telescope S/N 107409 received 24 March 2009. Relegated to temporary display status at our showroom until
the label can be replaced; otherwise this telescope was collimated then tested just fine.
So it maybe, in this thread, we should start a list of vendors in Europe, Asia, and the US who test optics before they ship them...
Maybe we should also link to the descriptions of their test equipment...
Then one could discuss which vendor makes tests that are sensitive enough.
As for TS, i think it is a negative.
I know they have some bench, but they appear only to look at some refractors with it. They certainly did not look at my edge on that bench before shipping. But I guess this may change if they know about the quality differences in these sct's. So perhaps one may tell them to test them and they would do it? I do not know...
Edited by Benni123456, 19 August 2019 - 04:46 PM.