Color filter red – 1.25″ – long-pass filter 610nm – in a robust
storage box.
Red filter with a steep absorption edge. Filters out the H-alpha line
the visible spectrum.
Blue and blue-green light is almost completely blocked, thereby
contrasts between the bright zones and the dark ones increase
bands on Jupiter and Saturn.
The most interesting filter for observing the polar caps of the
Mars and optimal filter for daily observation of all planets.