Not a scaled up version of the ALTER M 603 or M 703. The Alter M 809 is an quiete heavy proffesionell made large Maksutov, with same perfect moving mirror focusing system as the smaller brothers. The tube use an on all length insidethread to remove any straylight. The imagequality is similar to high quality 6" Apochromats and outperforms much larger Schmidt Cassegrains on nearly any object. After your first observing night, you think, that you used an high quality Apo. The sky is black, the objects are bright. and racersharp. Splitting double stars on the telescope limit, are no problem.
Custommade improvements as cooling van and electronicfocuser are possible for additional cost.
| Technical Specification | Value | Delivery |
|---|---|---|
| Clear Aperature | 203 mm | Opt. Tube with 8*50 Finder, piggy back camera mount, tubehandle, dovetailplate, woodbox |
| diameter of primary | 225 mm | |
| Focallength | 2.000 mm | |
| diameter of secondary incl. Baffle | 66 mm | |
| tubediameter | 240 mm | |
| tubelength | 620 mm | |
| tubeweight | 13 kg | |
| max. Magnification | 650 * | |
| Finder w/ quick relay bracket | 8*50 | |
| quality warranted | diffraction limited, possible orders for 1/6 wavefront p.t.v. and 1/8 wavefront p.t.v. |
