APM - Telescope APO SD Refractor 152mm F/6 with 3.7" ZTA

APM 152mm f/6 SD Apo Large Field Refractor and Comet Seeker.

This 2-element SD is a truly perfect telescope for the ultimate in wide-field observing. The stars are absolutely pinpoint, as only a well  corrected apochromatic refractor can produce. At the same time, the refractor is still easily transportable with a transport length of about 80 cm and a weight of 9 kg (  11 kg with rings, dovetail, handle ) . A srong  azimuthal mount, like our APM-AzMaxLoad or a good equatorial mount like the HEQ5 or the EQ6 are recommended as base. The 2-element SD objective with German Gerd Düring design offers an image up to about 200x without disturbing chromatic aberration due to the very good chromatic correction. The chromatic aberration corresponds approximately to that of our 152 mm F/8 APM ED Apo.

The 2-element lens in a temperature compensated mount:

The optics and mount are manufactured to German design. The mount is also a self-centering compensation mount based on our proven 140 mm SD apo.

Astrophotography with the APM 152 mm f/6 SD refractor:

Although the telescope is optimized for wide-field observing, photography of comets, extended nebulae, globular clusters and galaxies will also succeed. The fast focal ratio of f/6 allows short exposure times. However, an image field corrector is absolutely necessary to obtain sharp stars to the edge. We recommend the Riccardi RiFlat 1.0x- field flattening corrector , which screws directly into the M82x1 female thread of the focuser and the Riccardi Reducer-Flattener corrector 0.75 x ( both the M82 version and the M63 versions are recommended ) which turn the original focal ratio of F/6 now into a true rich field astrograph of F/4.5, and that for fully illuminated full format.

Scope of delivery:

• Optical tube
• Tube clamps
• Carrying handle
• Losmandy Mounting Plate
• 3.7" APM extension with M82 and M63 female thread