Tele Vue 67mm Converter Lens for 55mm Plossl (ECL-67.0)

Tele Vue 67mm Converter Lens for 55mm Plossl (ECL-67.0)Weve taken advantage of the full field capability of our 55mm Plssl by introducing a night vision specific converter lens that extends its focal length to 67mm; thereby reducing the eyepieces apparent field of view from 50 to 40 to exactly match the field of view of the PVS 14 objective. Thats a 20% increase in true field of view seen with a simple screw in accessory lens! Equally important as seeing the entire field available from the 2 eyepiece

The Sky-Watcher Esprit 80 is a world class 3" refractor

Focal Length 41mm Barrel Size 2" Apparent Field of View 68 degrees Eye Relief 27mm Weight 2

Still carrying your bulky telescope box to remote observing sites

which corresponds to OIII emission lines

This mount is perfect for the beginner to intermediate astronomer looking to expand their craft into astrophotography

Also many zoom-eyepieces do not deliver the best possible image quality at high magnification because they were designed with focus on the price-tag so that image sharpness and field size is getting worse with increased magnification

Cutouts hold up to 13 eyepieces of all types including 31-mm Nagler Type-5 and Bino Vue

WARNING: The filters of Optolong are not designed for sun observation

Enter the Celestron LensPen

Multi-coatings

18") Eye Relief: 17mm (

2 ft (15 m) Interpupillary Distance (max): 72mm (2