Updated Detail Design: all metal construction with aluminum and CNC black anodized; optical lense adopts apochromatic glass; filter thread for mounting 1.25 inch filter and improved two large locking thumbscrews for fixing eyepiece tightly;
2x Magnification Result: premium barlow lens provide 2x increase in magnification for allowing you look more closely and more detailed at the moon's surface and other planet during astronomical journey;
Muti Coated Optics Lense: Anti reflective internal finish to maximize image contrast; optical glass lens offers better viewing without introducing additional chromatic aberration and providing high light transmission for clear view and color correction;
85mm focal length and reduction factor of about 0.5x that depend on spacing; 0.5x focal reducer effectively halves the focal length of a telescope for enabling lower magnification;
Mounting threads: 1.25 inch filter thread or 28.5x0.75 mm on one sides; the opposite end of this adapter has a C-mount that is 1 inch diameter with 32 threads per inch standard for C or CS mount CCTV type cameras with telescopes;