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250mm x 250mm (10" x 10")
Unlike some other "iPhone serial cables" on the web
now users can enjoy the known high quality optics of DayStar at an affordable price
Large chrome knobs on the heavy-duty mount head make it easy to adjust the clutch locks
Dielectric and Phase Correction Coatings Waterproof Yes Fogproof/Nitrogen Purged Yes Body Color Black
Astrozap Off-Axis Glass Solar Filter 283mm-289mm Focal Length_400 - 599mm 250mm x 250mm (10" xAstrozap Off Axis Glass Solar Filter These are safe off axis solar telescope filters. An off axis solar filter blocks light into the telescope by only allowing light through a small portion of glass that is off center. By reducing the aperture the image is not darker but the visibility of daytime atmospheric turbulence is reduced. This premium off axis solar filter has an aluminum cell that is secured and centered to the tube end of the telescope with