Askar 1x Triplet Full-frame Flattener Professional Astronomical Accessory for 140APO Telescope
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Askar 1x Triplet Full-frame Flattener Professional Astronomical Accessory for 140APO Telescope
Description:
- The 1.0x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 140APO, it still maintained a focal ratio of 7. The flattener corrects field curvature and coma, resulting in flatter field edges and finer star points.
- The 1.0x flattener adopts a triplet design and supports a 44mm full-frame image circle. The overall weight is 0.75kg. The back focus from the M48 thread is a standard 55mm. The front thread is M92x1. At the camera end, it is equipped with M68x1, M54x0.75 and M48x0.75 three sizes of adapters, which are convenient for connection. At the same time, it has a built-in M48x0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.
Specification:
- (After attaching) 140APO Focal length: 980mm
- (After attaching) 140APO Focal ratio: f/7
- Lens number: Triplet design
- Back focus: 55mm (from the base of M48 male thread)
- Weight: 0.79kg
- Rear-end thread type: M68x1; M54x0.75; M54x0.75-M48x0.75 (M48x0.75 filter thread inside)
Package Included:
- 1 x Flattener
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