APM Apochromatic refractor AP 140/980 SD OTA (85634)

The 140/980 Apo telescope features doublet optics with SD glass, including one lens made from FPL-53. This combination delivers top-level performance and exceptional color correction, setting a new standard in its price category. Each lens is subjected to interferometric testing to ensure the high quality typical of APM telescopes.

The telescope comes equipped with a solid 3.7" focuser, designed to support heavy accessories and provide a completely vignette-free image, even with large format camera sensors. With a focal length of 980 mm and an aperture of 140 mm, this SD-Apo is a versatile all-rounder, ideal for observing closely spaced double stars with high contrast, detailed planetary views, and deep sky exploration. The lightweight construction at only 9.8 kg makes it suitable for use with compact mounts.

Specifications

• Optical Design: Refractor, apochromat

• Aperture: 140 mm

• Focal Length: 980 mm

• Aperture Ratio: f/7

• Resolving Capacity: 0.99

• Limiting Magnitude: 12.5

• Light Gathering Capacity: 400

• Maximum Useful Magnification: 280x

• Lens Design: Doublet

• Glass Material: OHARA FPL-53

• Tube Weight: 9.8 kg

• Tube Diameter: 152 mm

• Tube Length: 1030 mm

• Tube Material: Aluminium

• Carrying Length: 830 mm

• Coating: Fully multi-coated (FMC)

• Dew Cap Diameter: 186 mm

Focuser

• Type: Rack and pinion

• Eyepiece Connection: 2"

• Free Aperture: 94 mm

• Motorized: No

• Ring Clamp: Yes

• Gear Reduction: 1:10 fine focusing

• Rotating: Yes

Mount and Accessories

• OTA (Optical Tube Assembly) Only: No mount included

• Prism Rail: Losmandy-Style

• Carrying Handle: Yes

• Finder Base: Vixen/Skywatcher Level

• Tube Clamps: Yes

• Transport Case: Not included

• Finder Scope: Not included

• Corrector: Not included

• Deviating Optics: Not included

• Tripod: Not included

Area of Application

• Astrophotography: Yes

• Moon & Planets: Yes

• Nebulae & Galaxies: Yes

• Nature Observation: No

• Sun: Only with appropriate solar filter

Recommended For

• Beginners: No

• Advanced Users: Yes

• Observatories: No