Askar 135 mm f/4.5 APO Telephoto Lens

As the name implies, the FMA135 is born with a primary objective plus a field flattener. The primary objective features an APO triplet structure with a 30 mm diameter and a 135 mm focal length, one of which is ED glass.

The flattener contains three elements designed to support APS (Advanced Photo System) sky imaging and to control performance at the edges of the photo. The exquisite optical design is the main contributor to its unparalleled capability in both visual observation and astrophotography, as well as in controlling chromatic aberration. Furthermore, the FMA135 can also function as an excellent finder or guider. Its lightness and grace allow the FMA135 to be connected to various cameras with their respective adapters. Once connected, the FMA135 becomes a 135 mm manual lens, which will offer you a magnificent experience in imaging terrestrial objects.

At the front of the astrograph, there is a 1.25" female thread suitable for all available 1.25" filters and a standard M42×0.75 male thread at the rear that can accommodate most standard DSLR or astronomical cameras (an additional adapter is required). Our standard configuration includes a tube ring for installing the Vixen finder base, a 1.25" eyepiece holder for attaching an eyepiece or a guide camera, as well as a high-quality focuser (with thread) and a setting thread to avoid any deviation in astrophotography.

Thanks to the ingenious optical design, our FMA135 will surely provide you with an exceptional imaging experience.

Main features

Askar quality for a reliable and fulfilling observation experience.

• Diameter (mm): 30
• Aperture ratio: f/4.5
• Number of lenses: Triplet
• Flattener: NO

Main technical specifications