PRODUCT DESCRIPTIONS
Achromat doublet lens
1. 500 mm focal length for telescope
2. 75mm diameter
3. Good for making deep sky telescope
4. Free of chromatic abberation
5. With a good quality eyepiece you can get very clear views of celestial bodies even at higher magnifications
6 We have tested this lens with many eyepieces
7 The lens quality is very good due to high quality glass used and sophisticated technology used in making this lens