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Reviews & Articles - Members' Section
Most Recent Reviews Submitted by Members:
A small refractor fan shares the goods on this AT Apo...
The 32mm 1.25” plossl is one of a handful of available eyepieces that offers the maximum possible TFOV in the 1.25” format. However, reviews of the various 32mm 1.25” options are hard to find. With that in mind I gathered a sample of five different 32mm 1.25” eyepieces currently in production and added the 35mm 1.25” Orion Ultrascopic to the sample.
Though big Dobs and high-quality catadioptrics are often the telescopes of choice IF they have the time to reach and keep thermal equilibrium, something else is needed to make the most of less-than-ideal conditions while maintaining significant capability. That, at least to me, means a 4-inch APO refractor. Great optics, a short cool-down time, and reasonably light weight are the needed virtues.
The eyepiece market provides numerous options with a 20mm focal length ranging from inexpensive 20mm plossls to expensive “premium” options offered by Pentax and Televue. Eyepieces with a 20mm FL are very versatile giving exit pupils ranging from 4.4mm to 2.0mm with scopes having focal ratios from F/4.5 to F/10...
Most Recent Articles Submitted by Members:
Amateur astronomers have a choice between instruments that are commercially available or becoming amateur telescope makers and building ones that are more suited to their needs. For the latter, the amateur has the freedom of instrument design as well as selection of specific components that represent the best available instead of compromising with what is provided with a commercially built unit.
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