EUR 18,95
Type: | Colour filter |
Cell: | Metal cell |
Thread connector: | 1.25" filter thread M28 - male and female |
Filter height without male thread: | 7.7 mm |
Total height of the filter: | 11.2 mm |
Here is experience from many years of astronomical practice:
Colour | Recommended minimum aperture | Recommended for use on... |
Light Yellow #8 | 50mm Aperture | Moon, Mars, comets You can reduce false colour in Fraunhofer refractors. A nice universal contrast filter, even for small aperture telescopes |
Yellow-Green #11 | 60mm Aperture | Well suited for observations of Jupiter and Saturn. Reveals atmospheric structures even in small aperture telescopes. |
Yellow #12 | 80mm Aperture | Enhances contrast on the moon Reveals surface details and clouds on Mars Enhances cloud structures on Jupiter (especially the Great Red Spot) Can be used in double star observations with refractors - reduces false colour in Fraunhofer refractors |
Dark Yellow #15 | 114mm Aperture | Similar to yellow, suitable for bigger aperture telescopes Removes false colour in Fraunhofer refractors Enhances the contrast of structures on Saturn |
Orange #21 | 80mm Aperture | Enhances contrast in daytime and twilight observations (Venus, Mercury) by suppressing the blue light Reveals details on Mars (in larger aperture telescopes) Further details in Jupiter´s and Saturn´s atmosphere are revealed You may try spotting atmospheric structures on Uranus with large aperture telescopes. |
Light Red #23A | 60mm Aperture | For very high contrast on the Moon - suitable for small aperture telescopes This filter is used when observing the polar ice caps on Mars (100mm aperture and larger). Separates the polar regions of Saturn from the equator region Well suited for Venus by blocking the blue daylight. The sky appears black. |
Red #25 | 80mm Aperture | Similar to light red, suitable for telescopes of 100mm aperture and larger Enhances details on Mars |
Dark Red #29 | 120mm Aperture | Similar to light red, suitable for telescopes of 150mm aperture and larger. This filter will make for an extreme contrast. |
Light Blue #82A | 50mm Aperture | An important universal contrast filter for all telescopes, similar to light yellow. It brings along a gain in contrast on many objects within our solar system. |
Blue #80A | 70mm Aperture | General contrast gain on the moon, off its terminator |
Dark Blue #38A | 100mm Aperture | Similar to blue, suited for telescopes of 150mm aperture or larger |
Violet #47 | 120mm Aperture | Well-suited for observing Venus in telescopes of 150mm aperture or larger. It makes visible the dark clouds in Venus´ atmosphere. |
Green #56 | 60mm Aperture | An important universal contrast filter Drastically boosts contrast on the Moon - better contrast even far off the terminator - suitable for low magnifications This filter is especially effective on Jupiter, revealing the famous Great Red Spot and other reddish details in the Jovian atmosphere. White spots in Saturn´s atmosphere are enhanced in telescopes of 200mm aperture or larger |
Dark Green #58 | 120mm Aperture | Similar to green, but suitable for telescopes of 150mm aperture or larger |
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Reviews
Written by Benjamin Infantino
on 2016-05-12
"Does not absorb too much light, good enhancement on Sun and planets."