상품상세정보
Meade - Color Filter Set #1
Color filters are an essential tool of the lunar and planetary observer, for filters permit the observation and photography of surface detail that is often virtually invisible without filtration. Filters solve, or greatly reduce the effects of, two basic observing problems:
(a) Irradiation is the fuzzying of a boundary between lighter and darker areas of the Moon or a planetary surface and can be caused either by the effects of highly contrasting light impacting the human eye or by the motion of the Earth’s atmosphere, through which the observation is being made.
(b) Contrast is the separation of adjacent surface regions according to their color; for example, a light green area on Mars can become mixed in the eye with an adjacent light yellow area, to the effect that the combined area appears yellow-green, unseparated into its component regions.
The use of a Meade Series 4000 color filter can mean the difference between seeing small craterlets in the floor of Clavius on the Moon and not; it can mean the difference between seeing five or six whirls, festoons, and loops in Jupiter’s north equatorial belt and seeing one or two; it can mean the difference between seeing the inner cr?pe ring of Saturn and not. Depending on atmospheric conditions on both the Earth and the planet being observed, the advantages of color filters can be anywhere from subtle to dramatic.
Series 4000 filters thread into the barrels of virtually all 1.25" eyepiece brands.
Meade Series 4000 filters are a large 26mm in clear aperture and are manufactured from the purest crown optical glass, dyed-in-the-mass (not “color coated”); there are no finer filters available for telescopic applications. Each filter glass is anti-reflection coated on both sides and is mounted in a machined aluminum cell with the Wratten No. of the filter marked on the side of the cell. Filters may be piggybacked, or stacked, to achieve selective filtration of the visual color spectrum. For visual applications Series 4000 filters thread into the barrels of all Meade 1.25" eyepieces, and into the barrels of virtually all other 1.25" eyepiece brands as well. The eyepiece-with-filter can be placed in the eyepiece-holder of a Schmidt-Cassegrain telescope or Meade ED Apochromatic Refractor for Tele-Extender eyepiece-projection photography of the Moon and planets. The filters also thread into the barrels of the Meade Camera Adapter (1.25") and Variable-Projection Camera Adapter. Each Series 4000 filter is packed in a foam-fitted plastic case for secure long-term storage.
Set #1 includes:
#12 Yellow (74% transmission): Contrasts strongly with blue-colored features on Jupiter and Saturn, while enhancing red and orange features. Lightens red-orange features on Mars, while reducing or blocking the transmission, and thereby increasing the contrast, of blue-green areas. Useful in increasing the contrast of lunar features in telescopes 6" aperture and larger.
- Increases the contrast between lunarscape characteristics in various light conditions
- For observing the contrast of the thick Venus cloud under good light conditions
- To increase the contrast of the polar caps, frozen areas and low clouds on Mars
- Darkens the atmospheric currents of Jupiter
#23A Light Red (25% transmission): On telescopes of 6" aperture and larger the #23A does approximately the same functions as the #21 filter, but with stronger contrast and enhancement of marginally defined blue-green surface detail. Useful primarily on Jupiter, Saturn, and Mars. Increases contrast between Mercury and bright blue sky during daylight observations or during twilight.
- For better observing the blue tinted cloud formations of Jupiter
- Improving the observations when Mercury is in the twilight zone (when the planet is close to the horizon)
- Venus, for decreasing the luminosity of the observation when observing by daylight
- For improving the contrast of the polar caps, frozen areas and low clouds on Mars
#58 Green (24% transmission): Use on telescopes 8" aperture and larger to reject blue- and red-toned structures on the surface of Jupiter and thereby increase their contrast relative to lighter parts of the disc. Also use for the enhancement of Saturn’s cloud belts and polar regions. Strongly increases contrast of Mars’ polar ice caps, and increases contrast of atmospheric phenomena on Venus.
- Increases the contrast between lunarscape characteristics under various light conditions
- For observing the pattern of the clouds of Venus
- Mars, to increase the contrast of the polar caps and observe the frost
- Increases the visibility of the great red spot of Jupiter
- For a better observation of the white elements in the atmosphere of Saturn
#80A Blue (30% transmission): A popular filter for the study of Jupiter and Saturn. Enhances contrast of rilles and festoons in Jupiter’s cloud belts, as well as details of the Red Spot. Brings out detail in Saturn’s belts and polar phenomena. Very useful as a contrast-enhancing lunar filter.
- Increase the contrast between lunarscape characteristics
- Improves the boundaries between the red belts and the adjoining bright zones of Jupiter
- Usable during violet clearing and when studying the surface of the polar caps of Mars
- Improves the low contrast details of cloud formations of Saturn
#12A Deep Yellow- 투과율 74%
달표면, 화성의 남극과 오랜지 사막지역, 토성과 목성의 오랜지색과 붉은색 지형,금성의 구름띠를 관찰
#23A Red-투과율 25%
화성의 넓은 지역을 자세히 관찰, 푸른하늘에 대비하여 수성관찰, 금성의 구름띠를 명확하게 관찰, 토성과 목성의 푸른 구름 관찰
#58A Green- 24%
달표면 상세히 관찰, 목성의 붉은지역 관찰, 붉은색과 파란색의 미묘한 대비. 화성 남극의
용해(빙관)지역
#80A MEDIUM BLUE-30%
혜성 꼬리 관찰, 달표면 상세히 관찰, 화성 남극과 높은 구름, 금성을 볼때와 수성의 오랜지색 황혼모습
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