Explore Scientific 52° Series 4.5mm Waterproof Eyepiece

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Description

Explore Scientific 52° Series 4.5mm Waterproof EyepieceDescription High power eyepieces (e. g. 3mm to 10mm) are used not only for obvious observations of planets and double stars, but can be employed for bright, compact deep sky objects. Not only will the scale of an object like a planetary nebula or globular cluster be impressive as it fills the eyepiece FOV, but the background sky will be very dark as the contrast effect increases with added magnification, provided that the atmospheric seeing conditions

The object database used by ExploreStars is called the Celestial Database

an 8X50 non-illuminated straight-thru finderscope and quick release bracket

Three magnification settings and fully focusable make it perfect for viewing any object down to the cellular level

It offers a 50mm aperture

No computer is necessary to use the camera

13 arc seconds Light-gathering power 217x Eyepiece Barrel Diameter 31

Installed onto the ¼-20 bolt is a 3/8-16 adapter

Magnification 4x Optical design BK7 Roof Field of view - angular 11

3 degrees Apparent field of view 55

even fast Newtonians such as the BRESSER N20839 f/3

To insure a perfect seal we test every eyepiece in one meter of water for 30 minutes

This variable polarizing filter allows continuous adjustment of image brightness