I have never had such a difficult time star testing an optical system before , but then i have never had a APO triplet to test before.
No mater how much we racked the focuser or waited for cool down it just didn't want to play ball.
A real mixed bag.
I had my cheapy 20x80mm triplet binoculars(not an APO) apart a week ago re blackening the interior of the barrels and fixing a few little annoyances and did a star test image from one of the individual barrels with the original eyepiece and prisms removed and an old 3x barlow and a12.5mm orthoscopic held in place , like a telescope system.
Any way it was easy to produce a very nice star test pattern inside and out side focus and colour was obvious but not what you would expect from an f4ish triplet lens assemble at that magnification. 80x approximately
Worse colour than the Megrez but not as bad as an f5 Acromatic refractor.
I will attempt to get a TouCam image from them after Astrofest and compare to the other refractor tests done to date.
I also will be doing a Bino review before I destroy them between them and a pair of Celestron(Vixen) 11x 80's .
I love pulling things like this apart and there only fairly new.
Putting them back together was not as much fun due to the very simplistic prism mounts.
I tried different wide field eyepieces to see how they work and have toyed with the idea of using the objectives and making a neck friendly 45deg binocular , with interchangable eyepieces.
By my avaitar you see why.
