Hi Roger,
The Celestron/Vixen achromats were f10, is there any sticker or printing that says either the focal length, or f-ratio?
I had the Achro for a while, and although it gave very sharp images, the excess color after about 125X would be very noticable, especially the moon. An "ED" lens should hold up well past that.
David Simons
The Celestron/Vixen achromats were f10, is there any sticker or printing that says either the focal length, or f-ratio?
I had the Achro for a while, and although it gave very sharp images, the excess color after about 125X would be very noticable, especially the moon. An "ED" lens should hold up well past that.
David Simons
David Simons
