Quote:
Originally Posted by eskimo20
Looking at 125mm - 150mm achromats.....
Is it feasible to stop down the aperture to meet the constraints the physics for lunar and planetary and open up for deep sky.
Thanks
Robert
|
To me that suggests only one scope a 150mm f8 Synta. They are cheap and come up for sale every now and then.
Stopping it down works. I have done it with my 150 f8 stopping it down to be a 100 f12. It does reduce CA by a lot but also dims the view...a lot.
What worked best for me on planets with 150 at full aperture was bino viewers with a Baader semi-apo filter. CA wasn't apparent with that combo.
I then got LFLF
..... built my own 150 f12 that doesn't need a CA filter.
Matt
Edit: LFLF.....long focal length fever