Askar 1x full-frame (185 APO) is a dedicated accessory for the Askar 185 APO telescope. This flattener allows for perfect correction of the field curvature, which has a dramatic impact on the quality of astrophotographic shots.

Optically, the flattener was constructed as a triplet with a multiplicity of 1x, so it does not change the nominal focal length of the Askar 185 APO telescope. Thanks to the large diameter of the full illumination disc, it can be easily used with cameras equipped with full-frame matrices.

This device allows the installation of filters with a diameter of 2", screwed into the M48x0.75 thread on the camera side.

The most important features of the Askar 1x full-frame flattener (185 APO)

• flattener dedicated to the Askar 185 APO astrograph, compatible with cameras and full-frame cameras
• 1x factor that does not change the focal length of the telescope
• can be used with filters with a diameter of 2"
• 55mm back focus

Technical parameters

• optical design: triplet
• multiplicity: 1x
• compatibility: Askar 185 APO
• focal length without flattener: 1295 mm
• focal length with flattener: 1295 mm
• aperture without flattener: f/7
• aperture with flattener: f/7
• rear thread (camera side): M68x1 / M54x0.75 / M48x0.75
• front thread (extractor side): M92x1
• possibility of installing a filter: yes, 2"
• back focus: 55 mm
• total length: 159 mm
• weight: 0.79 kg

Set elements

• Askar 1x full-frame flattener (185 APO)

Guarantee

24 months