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All articles tagged with focal
Eyepiece Selection Category: Maximizing Viewing Success
Posted on Apr 22, 2011, 12:26 am Author: Jen Winter
Click to Enlarge! Wide field eyepieces work better with DayStar Fitlers
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Tagged Keywords: plossl, length, Eyepiece, selection, choice, performance, contrast, observing, viewing, solar, hydrogen, daystar, focal

Why do I need F/30? Category: Reaching F/30
Posted on Apr 23, 2011, 1:21 am Author: Jen Winter
F/30 is needed for best performance of narrow bandpass filters.
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Tagged Keywords: bandpass, focal, ratio, f/30, normal, wing, shift, blue, angle, hydrogen, alpha

Focal Reducer Benefits Category: Maximizing Viewing Success
Posted on May 5, 2011, 1:23 pm Author: Jen Winter
Our experience with eyepiece mounted focal reducers.
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Tagged Keywords: reducer, length, focal reducer, eyepiece, dawes, limit, sharpness, focal

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