40" C-Stand Turtle Base Kit 4 x 4" The Sky 1A filter is

The Sky 1A filter is also useful as a general protective filter to leave on lenses at all times

accurate colors and true blacks

half clear with a graduated density transition for smooth blending into the scene

This filter works by diffusing the light entering the lens with small aberrations

and other substances from reaching or damaging your lens's front element

40" C-Stand Turtle Base Kit 4 x 4" The Sky 1A filter isLowel 40 C . 40 . . Lowel C stand C stand . Lowel , , . C (CTB 40) . 1 . : 22 (10kg) : : : 118cm : 127 322cm : 53. 5 (136cm) : 53. 5 (136cm) : 37 (94cm) : 40 (101. 6cm) : , 1 Jr. (Turtle Base CTB 40CK CTB 40BK) : , ( CSL 40CK CSL 40BK) : : , : 12. 8kg (5. 8lb) : 12kg (5. 4lb)