Eyeguard Extender raises the eyeguard position by 8mm, and includes a rubber eyeguard and eyepiece cap (in case yours is lost or damaged.) Units are stackable: for example 2 units add 16mm height and make a 40mm Plossl very comfortable for solar viewing by blocking out stray daylight to maximize contrast in white light or hydrogen-alpha viewing.
Eyeguard extender is black anodized aluminum with anti-reflection threads.
Concept: Many of our eyepieces, such as Radians, Delos, Nagler type 4, 55 Plossl, 41 Panoptic have adjustable height eyeguards to permit comfortable viewing with or without eyeglasses.
Other eyepieces such as 35 Panoptic, 27 Panoptic, 40 Plossl, 32 Plossl have long eye relief that is comfortable for eyeglass wearers, but the eye relief may be uncomfortably long for some users without eyeglasses