Product Description
This is a very good medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in emission and reflection nebulas, etc. It has a rubber grip ring for a comfortable grip in cold weather. The 20mm is supplied as the standard equipment eyepiece with TeleVue refractors up to $3595 in price, giving you some idea of its quality. (You don't think TeleVue would risk killing a $3595 sale by putting in anything less than a superb eyepiece, do you?)
It provides an almost 4.5mm exit pupil with an f/4.5 Dobsonian reflector for rich field scanning of the Milky Way star clouds in Sagittarius. It's an excellent choice to complement the 40mm eyepiece provided with some go-to Schmidt-Cassegrains. It has a somewhat short eye relief that will limit the field for eyeglass wearers. Those who must wear eyeglasses while observing due to severe astigmatism would probably be better off using a Barlow and a longer focal length eyepiece with longer eye relief to reach this focal length, rather than buying this eyepiece for use on its own.
Tech Details
| Barrel Size | 1.25" |
|---|---|
| Eye Relief | 11mm |
| Field of view | 50 |
| Focal Length | 20mm |
| Number of optical elements | 4 |
| Weight | 4 oz |
| Warranty | Limited Lifetime |
Reviews
Review by: John
I have all kinds of eyepieces and brands. This is my go to one that I use in my fast reflectors. Great contrast and sharpness.
Cannot go wrong with this one. (Posted on 10/17/2019)
Cannot go wrong with this one. (Posted on 10/17/2019)
Review by: John
I have all kinds of eyepieces and brands. I have to say this is one of the go-to ones I use all the time in my
fast reflectors. Great contrast and sharpness. Cannot go wrong with this one. (Posted on 10/17/2019)
fast reflectors. Great contrast and sharpness. Cannot go wrong with this one. (Posted on 10/17/2019)
Review by: Pete
I have to admit these Plossls are excellent when viewing planets. (Posted on 10/17/2019)