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Two additional primary factors played into the equation – Eye Relief (and the related large eye lens size) and Ease of Viewing (a combination of long eye relief and control of pupil aberrations)
The high-resolution geared stepper motor lifts and supports telescope equipment weighs up to 6 kg
Single D/V hybrid saddle
This guarantees you visibly sharp stars across some of the largest CCD chips available today
40") Focal Length: 360 mm Focal Ratio: f/5
Sky Mentor Light Pollution Filter - 2" - TA-301-3 Mirror Diagonals Two additional primary factors playedSky Mentor Light Pollution Filter 2" The Sky Mentor Light Pollution Filter is a 2" specialty filter that blocks the visual spectrum except for wavelengths between 480 nm and 510 nm. This type of blocking filter is also known as a Nebular or ALP (anti light pollution) or an LPR (Light Pollution Reduction) filter. This particular transmission characteristic allows passage of ionized oxygen and hydrogen lines, but blocks light pollution sky reflectance
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