ASTROZAP solar filters are the safest option for solar observation and solar photography. Manufactured in glass, they guarantee durability.
Technical characteristics:
♦ Maximum safety front filter
♦ Transmission factor 1/100000 (ND 5.0)
♦ Optical glass treated
♦ The image of the sun is yellow orange.
♦ Fixing cell made of Aluminum
♦ Fixing to the tube secured with a nylon screw
♦ For tubes with outer diameters from 111 to 117mm
♦ Diaphanous aperture of 101mm (as indicated by the manufacturer)
♦ The cell that fixes the filter causes a little reduction of the diaphanous aperture
Undoubtedly the best choice for solar observation: sunspots, transit of Venus and Mercury, eclipses...