Wratten 23A red filter ,Enhances contrast on jupiter saturn and Mars.
Wratten 80A light blue, used to help reveal the white ovals and spots on Jupiter's cloud belts, will help the detection of subtle detail in Saturn's clouded atmosphere, and will increase the the details seen on mercury when the planet is low on the horizon. The blue filter will also give increased lunar contrast.
Wratten No 56 Dark green, will help define the edges of mars polar ice caps, and will be helpful in observing dust storms. Jupiter's great red spot and enhances the reddish jovian belts. Views of Venus during the day time are improved. Lunar contrast is improved.
Wratten no 21 Orange, Orange filters darken the blue sky and improve day time observations of the moon and planets. Also used for improving details in mars deserts, and some detail's in Jupiter's atmosphere.
Wratten No 15 Yellow/orange, Can improve the details in the upper clouds of venus and will enhance detection of dust storms on mars.
Wratten No 11 yellow/Green, will help define the edges of mars polar ice caps, and will be helpful in observing dust storms,. Jupiter's great red spot and enhances the reddish jovian belts. Views of Venus during the day time are improved. Lunar contrast is also improved.
Wratten No 12 Yellow, Can improve the details in the upper clouds of venus and will enhance detection of dust storms on mars.
Wratten 47 Violet ( 3% transmission use only on telescopes of 8 inches and over) useful for the study of the Martian polar ice caps , the observations of occasional phenomena in the upper atmosphere of venus also enhances the contrast between the rings of saturn
CLICK on picture for review and specifications
Sirius Minus Violet filter (MV1)
Premium refractor users generally have to accept some level of false colour in their views of the sky. This is most often seen as a blue halo of light seen around bright stars. The mv1 filter reduces the violet light by about 85%
ND 25, Allows 25 % of the light through reducing the glare of bright objects , also available on the market ND 13 (13% light transmission )
both are excellent moon filters.
The Antares Variable X polarizing filter, 5% to 70 % light transmission will help to reduce the contrast lost by diffraction spicks caused by a secondary spider mount.
Broad Band Nebular filters, Most effective when used with a telescope of 8 inch and over in light polluted sky these filters will dramatically improve image contrast by removing the noise or ambient light from the back ground sky Light from Natural oxygen emission, ionized mercury and sodium (vapour lamps) are selectively removed , while emission Nebula wave lengths are allowed through.
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