Lens Askar FMA180 40 mm wide open at F4.5

A small multi-purpose scope ASKAR FMA180
The Askar FMA180 lens incorporates two pieces of ED (extra-low dispersion) glass, providing excellent correction of chromatic aberration, laying the foundation for high quality astrophotography and observation.

Included reducer
The Askar FMA180 reducer also adopts the APO triplet design, providing a sharp image in addition to the objective. The reducer has a great ability to improve the quality of sky images, eliminating any aberration defects.

The ASKAR FMA180 has an original aperture of 40 mm, a focal length of 220 mm and a focal ratio of f/5.5. When equipped with the specially designed F4.5 reducer, the FMA180 will be a professional astrophotographer with a focal length of 180 mm and an aperture of f/4.5.

Small but powerful
In the field of amateur astronomy, it is rare to find an astrophotographer with a focal length of less than 200 mm, which is conventionally a specialty of ordinary lenses. But ordinary cameras are not specialized for astrophotography, so the images they take are not always satisfactory.

Askar FMA180, a revolutionary optical device, will give you sharp, sharp images.

The FMA180 is compact, with a main tube length of only 145 mm and a weight of 395 g. It can also function as a finder. In addition, it can also function as a quality finder or guide.

The mount can be split into 2 to allow use with dovetail or as a guide scope via finder mount.

Features:

• Aperture: 40 mm
• Lens: triplet APO air gap
• Wide-angle lens: 220 mm without corrector
• Reducer: 3-element reducer and photographic corrector
• Photographic focal ratio: f / 4.5 with corrector
• Length: 145 mm
• Weight: 395 grams
• Camera connection: M42X0.75 screw thread
• Working distance: 55 mm from the M42 screw thread
• Visual connection: 1.25 ".
• Filter thread M48x0.75

Supplied elements:

• ASKAR triplet objective 180 mm in tube
• Helical focus
• Corrector and reducer
• Extension tube 2x (M42X0,75 - thread T2)
• 1.25" adapter.
• Adjustable tube rings with universal adaptor plate
• Multifunctional adapter for hot shoe and photographic tripod and ARCA-SWiss type mount

In brief:

• Multi-purpose, photographic or guide scope.
• 40 mm aperture
• Triple-slit ED lens for vivid colors
• 180mm photographic focal length (with corrector) - Focal ratio f / 4.5
• 2" filter in front of the objective for nebula filters
• Large observation focal length 220 mm
• Compatible with all formats
• Precise helical focusing on the objective for accurate focusing - with locking mechanism
• T2 camera connection with a working distance of 55 mm (when used as a telephoto lens)
• Weighs only 395 grams
• can be easily attached to the telescope in place of the finder