Askar 30mm f/4.5 Triplet Apo Lens / Guidescope - FMA135
| Article number: | FMA135 |
| Availability: | In stock |
| Delivery time: | In Stock! |
The very new beginning of year 2021 witnessed the advent of our FMA135 astrograph, which inherits the consistent quality, compactness, and versatility from the FMA family while possessing incomparable specialty. As its name indicates, the FMA135 was born with a primary mirror plus a flattener. The primary mirror features an APO triplet structure with a diameter of 30mm and a focal length of 135mm, one of which is an ED glass.
The flattener contains three elements, designed to support APS (Advanced Photo System) sky imaging and control the performance at the edge of the photo. The exquisite optical design is the major contribution to its matchless ability in both visual observation and astrophotography, as well as chromatic aberration control. Further, the FMA135 can also work as an excellent finder or guider. Its lightness and grace make it possible to attach the FMA135 to various cameras with corresponding adapters. Once attached, the FMA135 turns into a 135mm manual lens, offering a magnificent experience in ground object imaging.
There is a 1.25" female thread at the front of the astrograph suitable for all purchasable 1.25" filters, and a standard M42×0.75 male thread at the back which accommodates most stock DSLR or astronomy cameras (an extra adapter is needed). Our standard configuration includes a tube ring for the installation of the Vixen finder base, a 1.25" visual back for attaching an eyepiece or guiding camera, and a high-quality focuser (with thread) along with a setting thread to avoid any deviation in astrophotography.
As an ingenious optical design, the FMA135 will definitely offer you a superior imaging experience.
Specifications:
- Aperture: 30mm
- Focal Length: 135mm
- Focal Ratio: f/4.5
- Objective Type: Air-spaced APO triplet (including an ED glass)
- Optical Design: Sextuplet refractor for APS imaging
- Overall Length: 113mm (photographic mode with flattener)
- Total Weight (Including tube ring & dovetail plate): 280g
- Rear-End Adapter Type: M42×0.75 thread (for imaging), 1.25" visual adapter (for visual observation)
- Package Information:
- FMA135 (one set)
- Tube ring (one piece)
- 1.25" visual adapter (one piece)
- Screws (five pieces)
- Manual (one piece)
