ASKAR FMA135 F/4.5 TRIPLET APO LENS

 

The Askar FMA135 F/4.5  is an extremely compact and lightweight triplet apochromatic refractor with one ED (extra-low dispersion) lens. The FMA135, when combined with the built-in three element flattener, is a very capable super wide-field astrograph with minimal chromatic aberration and distortion across an APS-C frame. As well as its superb imaging capability, it can be configured as a visual telescope, finder or guide scope.

 

 

Features

• Can be used as either a visual telescope or a highly corrected 135mm f/4.5 astrograph.
• Compact and exceptionally light, at 113mm long and 240 grams.
• Includes all adapters necessary for use as a photographic, visual, finderscope and guidescope. 
• 1.25" (M28.5 x 0.6) female thread at the front of the telescope for mounting standard 1.25" filters.
• Comes with mounting ring with finderscope dovetail base.
• Extremely portable and versatile construction, ideal for grab and go astrophotography with a star tracker.
• Highly precise helical focuser.

 

 

 

  

Specifications

 

Optical design	Air-spaced apochromatic sextuplet with one ED element
Objective diameter	30 mm
Focal length	135 mm
Focal ratio	f/4.5
Mount attachment	Vixen-style finder base
Focuser	Helical focuser
Camera connection	M42 x 0.75, 1.25" adapter
Backfocus	55 mm
Weight	240 g (without lens covers)
Length	113 mm
SKU	AS-135

 

Items included

 

• FMA135 telescope
• 1.25" visual extension
  
• Tube ring with finder base and adjustment screws
• Manual

 

 

Gallery

 

 

Crescent nebula widefield by Karsten Feyler | Askar FMA135, Touptek ATR 2600C Pro.

 

 

Single 3 minute shot, Askar FMA135, Sony A7R4.