Askar FMA135 135 mm f/4.5 APO Telephoto Lens
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Askar FMA135 135 mm f/4.5 APO Telephoto LensAskar FMA135 135 mm f/4.5 APO Telephoto LensAskar FMA135 135 mm f/4.5 APO Telephoto LensAskar FMA135 135 mm f/4.5 APO Telephoto Lens

Askar FMA135 135 mm f/4.5 APO Telephoto Lens

£289.00✓ 2 year warranty

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Out of stock due 10-15 working days

About this product

Model:  askar_fma135
Part Number:  FMA135

The ASKAR FMA135 is a premium optical instrument that features a 30mm ED triplet objective to deliver superb image quality for astronomical and terrestrial imaging. It also works as a finder/small telescope/guide scope.

The heart of the FMA135 is an air-spaced 30mm apochromatic f/4.5 triplet with an ED element to minimise chromatic aberration. With a focal length of 135mm, the objective lens is optimised and tested for demanding astronomical applications. The objective is carefully matched to an integrated three-element field flattener that yields flat fields and razor-sharp images with astronomy cameras with APS-C (or smaller) sensors.

The camera side of the FMA135 includes a standard M42x0.75 male thread for attachment to most astronomy cameras or T-rings. The instrument has a 55mm back focus. The top tube ring, which acts as a light/dew shield, includes standard M28.5x0.6 female threads that accept 1.25” astronomical filters. The body of the FMA135 includes a rotatable focuser to ensure precise and repeatable focus.

For straight-through observing with an eyepiece, there’s a standard 1.25” adapter that threads onto FMA optical tube. The FMA135 also includes a mounting ring with standard Vixen-style dovetail.

The overall tube length is 113mm. The FMA135 weighs just 280g (0.62 lbs).

Specifications:

  • Aperture: 30mm
  • Focal Length: 135mm 
  • Focal Ratio: f/4.5
  • Objective Type: Air-spaced APO Triplet (including an ED Glass). Sextuplet Refractor for APS Imaging
  • Overall Length: 113mm (photographic mode with flattener)
  • Weight: 280g
  • Rear-end Adapter Type:
    • M42 x 0.75 Thread (for imaging)
    • 1.25" Visual Adapter (for visual use)

What's in the box

  • FMA135
  • Tube Ring (One Piece)
  • 1.25" Visual Adapter
  • Screw (Five Pieces)
  • Manual
 

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