Click here to see similar items on eBay, and to buy.
Explore Scientific Telescopic Filter
Product Details Style Name: Set 4 from 200 mm opening
Brand: Explore Scientific
MPN: 0310294
UPC: Does not apply
EAN: Does not apply
Item Package Dimensions L x W x H: 12.4 x 10 x 9.6 centimetres Package Weight: 0.2 Kilograms Brand: Explore Scientific Included Components: 4 x colour filters, 4 x dust protection containers. Part number: 0310294 Telescope Mount Description: Equatorial Mount Warranty Description: 2 Year Manufacturer Guarantee Style: Set 4 from 200 mm opening Item model number: 0310294 Date First Available: 13 Nov. 2017 Filter Set 4 Moon & Planets from 200mm (8″) Apert. Made from high-quality optical glass Filter glass is absolutely parallel All optical surfaces have anti reflex coatings Filter housing from black anodized aluminum Style Name:Set 4 from 200 mm opening Color filters are an essential tool ofthe lunar and planetary observer, for filters permit the observation andphotography of surface detail that is often virtually invisible withoutfiltration.Filters solve, or greatly reduce the effects of, two basicobserving problems: (a) Irradiation is the fuzzying of a boundary betweenlighter and darker areas of the Moon or a planetary surface and can be causedeither by the effects of highly contrasting light impacting the human eye orby the motion of the Earths atmosphere, through which the observation is beingmade. (b) Contrast is the separation of adjacent surface regions according totheir color; for example, a light green area on Mars can become mixed in theeye with an adjacent light yellow area, to the effect that the combined areaappears yellow-green, unseparated into its component regions.The use of acolor filter can mean the difference between seeing small craterlets in thefloor of Clavius on the Moon and not; it can mean the difference betweenseeing five or six whirls, festoons, and loops in Jupiters north equatorialbelt and seeing one or two; it can mean the difference between seeing theinner crpe ring of Saturn and not. Depending on atmospheric conditions onboth the Earth and the planet being observed, the advantages of color filterscan be anywhere from subtle to dramatic.
Click here to buy, and to see similar items on eBay
Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Filters
Location: GB