The 2-group 4- element Plossl series eyepieces offer flat and clear images with good color correction. The NPL20, NPL25, NPL30 and NPL40 eyepieces feature a twist-up eye cup.
Jun 14, 2014
Eyepiece for star testPros:
The main purpose of purchasing this eyepiece is to perform star test with my telescope, against astigmatism.
As a plossl eyepiece, this eyepiece benefits the advantage of simple construction,with good optics.
With the aid of this eyepiece I found astigmatism caused by secondary mirror.
Now I use this eyepiece fore planetary observing and star test, after collimation.
This review was provided courtesy of AgenaAstro.comJun 30, 2012
High power, light pricePros:
Quality Lenses,Lightweight,Easy to UseCons: Comments:
Excellent eyepiece for lunar and planetary viewing. Tight eye relief, but it's what I expected from a plossl design. I plan on using it to split some tight doubles when I get an EQ mount.
This review was provided courtesy of AgenaAstro.comSort by
Apparent Field of View 50° Barrel Size 1.25" (31.7mm) Bolt Case Included Yes - Free Agena Eyepiece Container Bolt Case Size Agena 42x60mm Design Plossl Eye Relief by Design 2.3mm Focal Length 4mm Lens Elements 4 Lens Groups 2 Manufacturer Vixen Optics Eyepiece Focal Length 5mm and Under Eyepiece Field of View Up to 50 degrees Eyepiece Series Vixen NPL Barrel Type With safety undercut Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6) Eyepiece Weight 2.47oz (70.02g)