Premium APO Refractors

Premium APO refractors will be the subject this week on the Sky-Watcher What’s Up? Webcast.

Premium APO RefractorsThe Sky-Watcher team will take a deep dive into the world of premium APO refractors from affordable apos to world-class, larger aperture scopes. They will take a look at what the high-level brands offer and what makes them special.

Apochromatic (APO) refractors use special lenses that offer the best chromatic aberration correction and the highest contrast. Apochromatic refractors are great telescopes for deep-sky astrophotography but can be used with great performances to observe planets, Moon, Sun (with the proper Sun filter) and double stars.

Premium APO refractors offer designs that can be either doublet, triplet, or quadruplet optical systems which refers to the number of lens groupings, not necessarily the number of lenses, and can use a variety of specialty optical glass such as FPL53, Hoya, or fluorite to achieve the high contrast and perfection in the color. Focal lengths are also relatively short when compared to reflector designs making refractors an ideal choice for astrophotographers in search of a wide-field imaging telescope with shorter exposure times.

The Sky-Watcher What’s Up? Webcast is a live webcast held every Friday from 10am to 11am Pacific on the Sky-Watcher USA YouTube channel. Each week they discuss a new astronomical topic including gear, visual and imaging techniques, interviews and more.

What’s Up? webcasts are free by tuning into the Sky-Watcher USA YouTube channel. Can’t watch the webcast live? That’s OK, all webcasts can be watched whenever you like by visiting the YouTube channel.

And to make it easier for you to get the most extensive news, articles and reviews that are only available in the magazine pages of Astronomy Technology Today, we are offering a 1-year magazine subscription for only $6! Or, for an even better deal, we are offering 2 years for only $9. Click here to get these deals which only will be available for a very limited time. You can also check out a free sample issue here.

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