Askar 140 APO 1x Full-frame Flattener extras opinie

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Askar 1x full-frame (140 APO) is a dedicated accessory for the Askar 140 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 140 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 (140 APO)

• flattener dedicated to the Askar 140 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 140 APO
• focal length without flattener: 980 mm
• focal length with flattener: 980 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
• length (without adapters / total): 53 mm / 166 mm
• weight: 0.79 kg

Set elements

• Askar 1x full-frame flattener (140 APO)

Guarantee

24 months