Founder Optics 5 mm LER Alien 1.25" Eyepiece - A-LER-5 Celestron Evolution It can be used with

It can be used with the Antares RFT80 or any other finderscope having up to 90 mm in outside diameter

9 Focal Length (mm): 1200 Secondary Diameter: 48 mm Secondary Obstruction (by diameter): 24% Secondary Obstruction by Area: 6% Dawes Limit: 0

TeleVue Product Number: DRX-0050

features large objective lenses and anti-reflection multicoated optics to provide bright and crisp images

Founder Optics 5 mm LER Alien 1.25" Eyepiece - A-LER-5 Celestron Evolution It can be used withAlien 5 mm Long Eye Relief Eyepiece Wow, Alien eyepieces are out of this world! With a very comfortable 20 mm of eye relief across the series, Alien eyepieces are a joy to view through; even high magnification focal lengths like this 5 mm. The 5mm Alien eyepiece is parfocal with all other eyepieces in the Alien line, which means you will not need to re focus when you change eyepieces for a different magnification. The cool looking eyepiece body is