casstony
01-09-2008, 01:15 PM
Looking to trade my Orion 100ED f/9 refractor for an ED80 of any brand plus cash. If interested PM me with your offer.
The 100ED is in excellent condition. The lens appears to be very good: outer diffraction rings on either side of focus are similar in size and brightness; ronchi lines are straight and there is no astigmatism. Color is charcoal grey.
The 100ED is in excellent condition. The lens appears to be very good: outer diffraction rings on either side of focus are similar in size and brightness; ronchi lines are straight and there is no astigmatism. Color is charcoal grey.