About this product
Part Number: FMA135
The ASKAR FMA135 is a premium six-element 135mm ED lens that delivers superb results for astrophotography.
It also works well as a premium finder / compact ED refractor / guide scope.
The heart of the FMA135 is an air-spaced 30mm apochromatic f/4.5 triplet with an ED lens to minimise chromatic aberration. This is carefully matched to an integrated three-element field flattener for razor-sharp flat field images images when used with camera sensor sizes up to APS-C.
The camera side of the FMA135 includes a standard M42x0.75 male thread for easy 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 precise, rotatable, focuse.
For straight-through observing with an eyepiece, there is a standard 1.25” adapter that threads onto FMA optical tube.
The FMA135 also includes a mounting ring for use with standard Vixen-style dovetails.
- Aperture: 30mm
- Focal Length: 135mm
- Focal Ratio: f/4.5
- Optical design: Air-spaced sextuplet ED refractor
- 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)
Please fill in the form below to ask a question.