ASKAR FMA telephoto lenses are not simple photo lenses, they are apochromats optimized for astrophotography. The triplet APO lens allows magnifications up to about 150x without loss of sharpness performance. To our knowledge, no telephoto lens in this class can do that. The stars on the image are correspondingly sharp.
The 4-element corrector specially developed for the 50 mm triplet lens flattens the image field up to full format and improves the focal ratio to a fast f/4.6 with full sharpness. The internal blackening and the elaborate multi-coating ensure high-contrast and brilliant images without reflections even under difficult lighting conditions.
Astrophotographic results obtained with this telescope on AstrobinHere you can find some astrophotographs made with this telescope model: Link to Astrobin
The FMA 230 mm f/4.5 as a telephoto lensThe manual APO telephoto lens is corrected up to full format. From the M48 thread you have 55 mm working distance. Ideal for system cameras, DSLR and of course astro cameras. The high speed of f/4.6 allows short exposure times even under difficult lighting conditions.
The FMA 230 f/4.6 as astrographAstrophotographers will be delighted with this compact telephoto lens. Stars up to the edge are imaged crispy sharp. With 55 mm working distance (M48 mount) you can connect all common cameras. The multi-function bracket allows easy adaptation to your mount, photo tripod or to compact photo trackers, such as the Skywatcher Star-Adventurer or to a attachable camera mount via the 1/4" female thread.
The FMA 230 as APO refractor and guidescopeThe objective can be combined with 1.25" and also with 2" accessories and allows ultimate wide field observations. Enjoy the landscape or view vast star fields. Use the sharpness performance of the APO lens to see lunar craters, the play of Jupiter´s moons or the rings of Saturn.
The FMA230 is also a powerful lens for autoguiding. With the matching autoguider, you can track telescopes up to 10" aperture flawlessly.
The FMA 230 as spotting scopeThe high-contrast optics enable exciting wildlife and landscape observations. In just a few steps, you have turned the telephoto lens into a compact and crisp spotting scope. You can use all common photo tripods, the adapter is already included. Use 1.25" or 2" eyepieces at low magnification for bright images, even under extreme lighting conditions, and eyepieces for high magnification to see fine details.
Scope of Delivery:
- Askar 230 mm triplet lens in tube
- Helical focuser
- Corrector and reducer
- Extensions with M48 thread
- 2" adapter
- Adjustable tube rings with universal adapter plate - Vixen style
- Multifunction adapter for viewfinder shoe and photo tripod and Arca-Swiss style rail
- Dust caps
Products specifications
| Connection to camera | M48 x 0.75 Thread |
| Connection to eyepiece | 2" and 1 1/4" |
| Type of telescope | Apochromatischer Refractor |
| Aperture | 50mm |
| Working distance from the camera thread | 55 mm from the M48 external thread |
| Lens | Air-spaced triplet lens |
| Focal length | 275mm |
| Focal ratio | f5.5 (with corrector f4.6) |
| Tube weight | 1045g |
| Tube diameter | 68mm |
| Length | 248mm |
