Threads into diagonals or eyepieces, improves contrast and almost eliminate purple fringing in 2 elements achro refractors, also emphasizes detail on Jupiter & Saturn.
Comes with plastic case, selling $45.00
Orion V-Block
Read how V-Block filter improves a 150mm Achromatic Refractor!
Orion V-Block in use
WTS: Orion Minus Violet Filter 1.25" -SOLD
WTS: Orion Minus Violet Filter 1.25" -SOLD
Last edited by hommel on Sun May 27, 2007 10:23 pm, edited 1 time in total.