APM Apochromatic refractor AP 100/800 LZOS 2.5-ZTA OTA

Description:

With a 4-inch aperture, the AP 100/800 optic is a classic size for beginners. However, this four-incher offers conceivably outstanding optical and mechanical quality! You may assume that the optics also reaches the theoretical specifications in the sky!

The very high quality 100-millimeter optics is here with a slightly longer focal length and therefore a relatively small aperture ratio of f/8. This design is a very good compromise between visual use at high magnification and for wide field astrophotographic use.

The front lens is a high quality triplet with ED glass, long tested and mature. The quality of the imaging of this lens is supported by the mount design optimized for temperature compensation and a high quality multi-coating. To back this up, an interferometric test report is included with the optic.

The torsion-resistant tube is made of aluminum and equipped with an aperture system.

The high-quality ZTA 2.5" focuser from APM with 1:10 micro-reduction is more than adequate for the high standard of the optics. It can be rotated 360° and is of course ideal for astrophotography. The focuser accepts accessories with 2" sleeves. Thanks to the Fast-Lock adapter, however, accessories with the 1.25" plug-in dimension can also be clamped securely and centrically.