The Askar SQA55 55 mm f/4.8 quintuplet APO tube is the perfect choice for astrophotography enthusiasts seeking a premium mobile device.
The Askar SQA55 55 mm APO tube, with its 55 mm diameter optics, is a 264 mm focal length telephoto lens built on an extremely focal ratio, f/4.8 Petzval system. The five-element optical system with SD glass and ED optics ensures pinpoint imaging and color-free pictures across the entire field of view, resulting in exceptionally sharp and detailed images. Thanks to the Petzval design, there is no need to calculate backfocus.
The adjustable focal ratio between f/22 and f/4.8 allows users to customize depth of field for daytime use. A key feature of the Askar SQA55 tube is the dual-speed manual focus, which allows for precise adjustments and gives users full control during focusing. The M67 thread in front of the lens allows for the attachment of additional filters or accessories, while the M48 thread makes camera attachment straightforward.
The product weighs only 1.84 kg, making it easy to transport.
Main Product Features:
- 55 mm diameter optics
- 264 mm focal length telephoto lens
- Extremely focal ratio, f/4.8 Petzval optics
- Five-element optical system with SD and ED glass
- Adjustable focal ratio: between f/22 and f/4.8
- M67 thread in front of the lens
- Dual-speed manual focus
- 1.84 kg weight
- M48 thread for camera attachment
- Vixen-style dovetail bar
The Askar SQA55 APO tube is designed to meet the needs of maximalist astrophotographers: it delivers detailed, clear, and sharp images every time - success will not depend on it.