Astroprices

APO 204mm f/7 Triplet ED FK61

Airy Disk

From $14,800.00

3 stores

In stock

The Airy Disk 204mm f/7 APO refractor is built on a triplet optical design using Hoya FCD-100 ED glass, delivering exceptional color correction and minimal chromatic aberration. This 8-inch triplet APO provides high-contrast imaging and genuine observing pleasure, making it ideal for both visual observers and astrophotographers seeking superior optical performance. With a relatively fast focal ratio of F7, it is 50 inches long (dew shield retracted) and suitable for smaller observatories. The telescope features a 4-inch 10:1 rack and pinion focuser compatible with EAF and is designed for serious observers pursuing detailed astronomical observations and high-quality deep-sky imaging.

Specifications

Optical design Triplet ED (Extra-low Dispersion)
Focuser Type 4-inch dual-speed 1:10 rack-and-pinion
Glass Type H-FK61 CDGM
Focuser Thread M134x1
Length (hood extended) 770 mm
Aperture 204 mm
Coating Full surface wideband multilayer
Tube Material Aluminum alloy
Weight 10.6 lb
Focal ratio f/7
Limiting Stellar Magnitude 13.3
Binoviewer Compatible
Focal length 1428 mm
Resolving Power 0.57″
Tube Color White
Dovetail Style Losmandy
Field Flattener Available 0.8x reducer
Length (hood retracted) 705 mm

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