Concept: Many Tele Vue eyepieces, such as Radians, Nagler type 4, 55 Plossl, and 41 Panoptic have adjustable height eyeguards to permit comfortable viewing with or without eyeglasses.
Other eyepieces such as the Tele Vue 35 Panoptic, 27 Panoptic, 40 Plossl, and 32 Plossl have a long eye relief that is comfortable for eyeglass wearers, but the eye relief may be uncomfortably long for some users without eyeglasses.
Enter the Tele Vue Eyeguard Extender!
The Eyeguard Extender raises the eyeguard position by 8 mm, and includes a rubber eyeguard and eyepiece cap (in case yours is lost or damaged.) Units are stackable: for example 2 units add 16 mm height and make a 40 mm Plossl very comfortable for solar viewing by blocking out stray daylight to maximize contrast in white light or hydrogen-alpha viewing. The Tele Vue eyeguard extender is black anodized aluminum with anti-reflection threads.
Remove rubber eyeguard to reveal bare eyeguard flange. Mount Eyeguard Extender and you're in business!
The Tele Vue Eyeguard Extender attaches to the top of your eyepiece with the simplicity of a DIOPTRX corrector. It has two rings that thread together to clamp on the eyepiece: an inner-ring that holds the rubber eyeguard and outer ring that slips over the top of the eyepiece. Starting with the inner-ring backed off from fully tight, take off your existing rubber eyeguard, place the Tele Vue Eyeguard Extender in its place, screw-down the inner ring until the Eyeguard does not slip off.
TeleVue Product Number: EGE-0020