Askar Apochromatic refractor AP 55/264 SQA55 OTA (85287)

The Artesky Apochromatic Refractor AP 55/264 SQA55 OTA is a compact and high-performance astrograph designed for advanced astrophotographers. With its 55mm aperture and quintuplet lens design, it delivers sharp, distortion-free images, making it ideal for capturing detailed views of nebulae, galaxies, and planets. Its lightweight construction, integrated corrector, and precise hybrid focuser ensure excellent portability and ease of use for imaging sessions.

Specifications

• Type: Refractor
• Type of build: Astrograph
• Aperture (mm): 55
• Focal length (mm): 264
• Aperture ratio (f/): 4.8
• Resolving capacity: 2.51
• Limit value (mag): 12.3
• Max. useful magnification: 110
• Tube construction: Full tube
• Light gathering capacity: 60
• Coating: Multiple
• Lens design: Quintuplet
• Stray light baffles in the OTA: Yes

Tube Details

• Dew cap diameter (mm): 92
• Carrying length (mm): 244
• Tube length (mm): 316

Focuser

• Type of build: Hybrid
• Connection (to eyepiece): 2"
• Rotating: Yes
• Gear reduction: Without
• Ring clamp: Yes
• Backfocus (mm): 50–60
• Connecting threaded socket (camera-side): M48 x 0.75

Mount and Accessories

• Type of build: OTA (no mount)
• GoTo control: No
• Tube clamps: No
• Finder base: Vixen/Skywatcher Level
• Prism rail: Vixen-style
• Corrector: Integrated
• Transport cases: Yes
• Carrying handle: Yes

General Details

• Total weight (kg): 2.18

Area of Application

• Nature Observation: Yes
• Moon & Planets: Yes
• Nebulae & Galaxies: Yes
• Astrophotography: Yes

Recommended For Advanced users; not suitable for beginners or observatories.