William Optics SWAN 40mm Eyepiece - 2" Made in USA! (Pre-owned) Spotting Scopes with 2 ED glass elements

with 2 ED glass elements

0 mm Filter clear aperture 128

This filter can also be used to darken the blue-sky background when hunting for planets like Venus or Jupiter in the daylight

the flexibility works both ways: if you start with the APC 60 ED

With this FirstLight MAK152 mm Maksutov-Cassegrain telescope and mount from Explore Scientific

William Optics SWAN 40mm Eyepiece - 2" Made in USA! (Pre-owned) Spotting Scopes with 2 ED glass elementsSWAN: a huge lens rich field eyepiece at a very reasonable price! Fully multicoated advanced design for breathtaking and jaw dropping 72 deg. F. O. V. views. A True Spacewalker! Marvelous super wide field of view: 72 deg. F. O. V. Fully Multicoated lenses for excellent transmittance. Outstanding chromatic aberration correction. Sharp and well contrasted. Great Contrast Internally fully blackened (lens edges and internal spacers). No flaring or