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This 10:1 ratio means that you would have to rotate the micro-focusing knob ten times to get the same focus movement with just one rotation of the larger knob
Finding and holding that perfect crisp focus is almost effortless with Explore Scientific’s Crayford Style Focuser
the GOTO system can be easily operated from your own Apple
(by use of Carbon Fiber
Orion SkyWizard
Astrozap Off-Axis Glass Solar Filter 244mm-251mm Accessories This 10:1 ratio means thatAstrozap 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