Askar FMA180Pro 40mm f/4.5 Apo Astrophotography Lens User Manual

June 9, 2024
Askar

FMA180Pro 40mm f/4.5 Apo Astrophotography Lens
User Manual

Instructions for use

To provide customers with more options, Askar has launched the new FMA180 pro.
FMA180pro is similiar to the FMA180 in optical structure.The objective lens features a sextuplet air-spaced APO design and includes two pieces of ED glass, providing excellent correction of chromatic aberration, which lays the foundation for high-quality astrophotography and observation. It has an aperture of 40mm, a focal ratio of f/4.5, and a focal length of 180mm.
In addition to visual observations, the FMA180 pro is specially optimized for astrophotography. Compared to FMA180, FMA180 pro adds a finder base and a 360° rotator. What’s more, the focuser upgraded to a new integrated internal focus system which promotes its stability and ensures its performance in use as a delicate, high-quality, and compact astrograph.
The FMA180 pro comes with an M48 adapter at the rear end, and the back focus is the standard 55mm. The multifunctional base can not only be used for astrophotography but also be mounted onto other telescopes’ finder bases as a finder scope after the Vixen dovetail plate is detached.
In a word, FMA180 pro is a compact astrograph for astropho-tography with more integrated functions and a more dedicated design.

Specification

Aperture: 40mm
Focal length: 180mm
Focal ratio: f4.5
Objective type: Sextuplet air-spaced APO(including two ED glasses)
Overall length: 167.5mm
Weight: 0.8kg
Rear-end thread type: M48x0.75 (built-in 2” filter thread)
Package items: a FMA180pro,a manual

Askar FMA180Pro 40mm f 4.5 Apo Astrophotography Lens - fig
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Askar FMA180Pro 40mm f 4.5 Apo Astrophotography Lens - fig
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WARNING!!
DO NOT LOOK AT SUN THROUGH TELESCOPE. IT WILL CAUSE IRREVERSIBLE DAMAGE TO YOUR EYE.
www.sharpstar-optics.com

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