Askar 200mm Focal Length Terrestrial / Astrophotography Camera Lens # ACL200

Description

ASKAR 200mm Focal Length Terrestrial / Astrophotography Camera Lens # ACL200
ACL 200mm F/4 Lens Features:
1. This 200mm focal length professional camera lens for astrophotography is a world first, features the appearance and structure of a standard camera lens. Its integral design offers a compact, lightweight and easy to use optical system.
2. This lens is carefully designed to optimize the quality of the image and create optimal performance. Straightforward and easy to use.
3. Excellent for the elimination of chromatic aberration. no need to worry that the chromatic halo in a photograph caused by normal camera lens and telescope.
4. Full frame photography and flat-field correction supported, it effectively corrects for chromatic aberration and produces superb images.
5. For astrophotography, this is  F/4 is a fast focal ratio, which can effectively shorten the exposure time and reduce the burden of maintaining critical tracking accuracy of an equatorial mount for an extended period of time.
6. For astrophotography, it adopts two focus modes: One is a coarse adjustment （Helical Focuser), the other is 1mm micro adjustment making critical focus.
7. For landscape photography, it is optical optimized designed features F/4 -- F/22 aperture，thus it can be used for astrophotography and landscape either simultaneously or overlapping. The shortest focusing distance is 3 meters.
Specifications:
Focal Length: 200mm
Minimum Aperture: f/22
Aperture Blades: 10 pieces
Lens Construction: Six elements (three groups of two) including two ED elements
Closest Focusing Distance: About 3m
Focus Mode: Manual Focus
Focus Type: Precise focusing and rough focusing
Micro-motion distance: 1mm
Filter Diameter: 82mm
Maximum Diameter and Length: About 100x195mm
Weight: 1.5kg
Made in China
This is a brand new item; New, Never used.