William Optics SWAN 25mm Eyepiece 2" (Pre-owned) 31 mm Filters Prominar lenses and prisms undergo

Prominar lenses and prisms undergo advanced multi-layer coatings

and a VESA mounting plate

You may also make adjustments to brightness

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This Finderscope can be mounted to your telescope's accessory shoe with an F50FB or with F50DTB

William Optics SWAN 25mm Eyepiece 2" (Pre-owned) 31 mm Filters Prominar lenses and prisms undergoThe Swan eyepieces are super wide angle designs with a 72 apparent field of view. They use simple but sophisticated five lens optical systems for generally higher contrast than the more complicated optical designs used in some other super wide angle eyepieces that use up to eight lenses. All lenses are fully multicoated for high light transmission. Lens edges and internal field stops are blackened to reduce internal reflections and improve contrast.