Askar FMA180Pro 40mm f/4.5 Apo Astrophotography Lens User Manual
- June 9, 2024
- Askar
Table of Contents
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
WARNING!!
DO NOT LOOK AT SUN THROUGH TELESCOPE. IT WILL CAUSE IRREVERSIBLE DAMAGE TO
YOUR EYE.
www.sharpstar-optics.com
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