Scopetech who has the same known manufacturers Dai-ichi Kogaku & Kubota Optical provide now consistent quality at high level.
I cannot get a Starbase 80 but I could sent to Joerg° 3 samples : 1 old more than 2 years old that is planned to go to trash and 2 new
The nearest to Starbase 80 is a 80/900.
High precision in figuring, but under polishing time and edge issue that lower the PtV.
Scopetech also suffer copy or fraud.
I got doubt when i tested the complete second hand refractor at x100/x120 maximum on Moon, cannot be used with an Or.Pl 6mm : image was blurred.
The 80/1000 is now destinated to trash : we found (message today Jan. 23rd) with help of Scopetech customer support that it was a customer replaced lens before a resell.
I got the information that all of the lens polished are compared on test plates.
Missed figuring caused the worst case : spherical aberration, nothing can be done to enhance contrast even at lower magnification.
This one under is only .81 strehl, we don't know from where it comes.
The 80/1200 (high end) is here : https://www.cloudyni...days/?p=9924611
It has a 0.972 strehl in D ray (planetary) and 0.98 strehl for solar use.
Takahashi is providing support and constant quality check for the 80/800 of the Starbase 80 so you can expect at least .95/.96 strehl for it.
°Joerg is Wellenform : the usual APM telescopes interferometry reference test company.
Edited by lylver, 23 January 2020 - 08:11 AM.