allan gould
13-11-2006, 10:49 PM
Well a few days ago I received my new WO Megrez 80mm Apo ED triplet. I have star tested it as well as passed a ronchi screen over it. I have also taken a few quick star photos to look at the amount of coma or edge distortion of stars at the edge of a 350D frame.
Ecstasy!!!!!!!!!!!!!!!!!!!!
Defocussed stars give identical patterns inside and outside of focus.
When focus was approached the circles collapsed to a perfect circle and point of best focus was easy to see.
Ronchi test showed no turned edges, astigmatism surface ridges or hollows or any defects. Perfectly straight lines evenly spaced inside and outside of focus. As near perfect as I can tell.
Photos of a star field taken before the clouds came in in Brisbane, show stars in the center and at the very edge of the 350D field of view are identical and small round spheres with no spurious colour.
I purchased this scope from Andrews Communications.
Why mention it? Well the first scope had CA, SA and astigmatism.
Within a heart beat Lee Andrews said send it back and he would replace it immediately. Within 3-4 days I had my replacement scope which as you can see delights me but I am also very appreciative of the quick and professional manner in which the scope was replaced with no questions asked. Brilliant service and thats why I try to support local vendors who may not be able to match some of the OS prices but they certainly can match it in customer confidence and service.
Thanks Lee for your integrity.
Ecstasy!!!!!!!!!!!!!!!!!!!!
Defocussed stars give identical patterns inside and outside of focus.
When focus was approached the circles collapsed to a perfect circle and point of best focus was easy to see.
Ronchi test showed no turned edges, astigmatism surface ridges or hollows or any defects. Perfectly straight lines evenly spaced inside and outside of focus. As near perfect as I can tell.
Photos of a star field taken before the clouds came in in Brisbane, show stars in the center and at the very edge of the 350D field of view are identical and small round spheres with no spurious colour.
I purchased this scope from Andrews Communications.
Why mention it? Well the first scope had CA, SA and astigmatism.
Within a heart beat Lee Andrews said send it back and he would replace it immediately. Within 3-4 days I had my replacement scope which as you can see delights me but I am also very appreciative of the quick and professional manner in which the scope was replaced with no questions asked. Brilliant service and thats why I try to support local vendors who may not be able to match some of the OS prices but they certainly can match it in customer confidence and service.
Thanks Lee for your integrity.