TeleVue Nagler 4.8mm Eyepiece (Pre-owned) Lunt Solar Telescopes The FRA300 Pro has a

The FRA300 Pro has a patented multi-functional attachment system

Temperature Sensing control for 2 of the 4 heater ports

Longer 270mm dovetail saddle to better support larger optical tubes

This zero amp glow feature is implemented at the hardware level and does not require software control

As we all know

TeleVue Nagler 4.8mm Eyepiece (Pre-owned) Lunt Solar Telescopes The FRA300 Pro has aIn excellent condition Specifications for Televue Nagler 4. 8 mm eyepieces ENA 4 8: Focal Length: 4. 8mm Apparent Field of View: 82 # of Elem.: 7 Barrel Dia.: 1 1 4" Eye relief: 7 Weight: 0. 33 lb 5. 3 oz Field Stop diameter: 6. 6mm Works in Bino Vue: Y