Are both Dovetail bars in these pictures both Skywatcher, or do you produce these please? Tax: Most early binoculars used Galilean optics; that is, they used a convex objective and a concave eyepiece lens.The Galilean design has the advantage of presenting an erect image but has a narrow field of view and is This telescope fits the category that experts most often suggest for beginners looking to get the most bang for their buck. To test the telescopes optical quality, we followed the advice of Greg Jones, president of Eclipse Technologies and resident optics expert of the Rose City Astronomers club, in performing a Ronchi eyepiece test. Initially we had to decide whether to include these computerized models at all in our testing pool. You can have quite a bit of dust and crud build up with very little noticeable effect on your viewing experience. it is very important to recenter would do Incl. The standard 20mm erecting eyepiece delivered clear sharp views of the moon with excellent shadow definition along the terminator. Splurged on a quality zoom rather than skimping on many fixed focal length eyepieces. From Amateurs To Experts, Astrophotographers choose OPT Telescopes for all of their needs. If youve done everything in Step #1 correctly, you might already be done. Collimation Eyepiece - 1.25" Learn More. 365.00, Special Price 164.00. google_ad_width = 728; 635.00, Special Price Again, the 4mm eyepiece proved of little use and delivered only a faint smudge of color. You can determine a telescopes magnification limits by multiplying the diameter (in millimeters) of the main lens or mirror by 2. It is the focal length that is the primary factor in determining the telescopes magnifying power.
