About this product
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).
- 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
- Tube Ring (One Piece)
- 1.25" Visual Adapter
- Screw (Five Pieces)
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