TeleVue Plössl 20mm – 50° 1.25″ Eyepiece

TeleVue Plössl 20mm : 50° 1,25″ Oculair: klassiek Ploessl-oculair van TeleVue

The TeleVue Ploessl 20 mm offers low working magnification with the high contrast that characterizes the series. It is the practical choice for locating objects and for more extensive deep-sky observing.

With an eye relief of about 14 mm, it offers a comfortable viewing experience, even during longer sessions.

The TeleVue Ploessl design

Four lenses in two groups are all a good Ploessl needs. Because there are few glass surfaces, transmission remains high and contrast is maximized: precisely the characteristics that matter for planetary and lunar observation.

TeleVue T-type optics brought the design to the current level in the seventies, with tight manufacturing tolerances, multiple coatings, and blackened lens edges. You can see the difference compared to a standard supplied eyepiece right at the edge of the field.

Search and observe

At this focal length, you can find objects quickly and continue viewing them immediately. On a Dobson without GoTo, this is the eyepiece that most often goes into the focuser first.

With a 2x Barlow, the 20 mm becomes an effective 10 mm, exactly the classic follow-up magnification.

In your telescope

In a telescope with a 1200 mm focal length, this eyepiece yields about 60x with a true field of view of approximately 0.82 degrees. For your own telescope: true field of view = 57.3 x field stop divided by the focal length of the telescope.

The effective field stop of this model is approximately 17.1 mm.

Featured accessories

A TeleVue 2x or 3x Barlow lens doubles or triples the magnification of any Ploessl eyepiece without any loss of quality; two Ploessl eyepieces plus a Barlow lens thus cover four magnification levels. Models 25 mm and larger also accept the Dioptrx astigmatism corrector.

For whom yes and for whom no

• ✓ Search and track objects
• ✓ More expansive deep-sky work
• ✓ The first upgrade besides an included eyepiece
• ✗ For maximum overview, the 25 or 32 mm is there
• High planet magnifications

Specifications

You can find the complete product line for this merk at the TeleVue merk Page.