[Domestic Genuine Product] Askar 50P 4-element, 4-group Petzval APO 190mm/F3.9 APS-C Astrograph SHA0128

This highly portable astrograph for astrophotography features a 50mm aperture, 190mm focal length, and a bright F3.8 optical system.

It utilizes a 4-element, 4-group Petzval optical system with one SD glass element. It supports APS-C format and is optimized for use with 1-inch sensors.

The self-flat design of the Petzval optical system provides a flat image plane without the need for additional corrective lenses, making it suitable for professional astrophotography.

The bright F3.8 aperture allows for shorter exposure times for live stacking, making it suitable for electronic observation as well.

It uses a highly versatile M48 x 0.75mm connection interface, allowing attachment of many cameras, including CMOS cameras and SLR cameras.

The back focus ranges from 50mm to 65mm, and by attaching a commercially available M48-31.7mm adapter, it can also accommodate 31.7mm accessories such as guide cameras and eyepieces*.

*Direct viewing only. Zenith mirrors and flip mirrors cannot be attached. The telescope tube features a smooth, easy-to-operate straight-line helicoid focus ring. It is compatible with standard MXL belts and supports the attachment of third-party motorized focusers.

The eyepiece section is equipped with a 360° field-of-view rotation mechanism with a scale, allowing for precise composition adjustments while checking the scale.

A 48mm filter mounting thread is built into the eyepiece adapter. A 52mm filter can be attached in front of the objective lens.

A multi-functional integrated tube handle is standard equipment. The top slot for attaching a finder scope has an Arca-Swiss plate compatible groove, allowing for direct attachment to a tripod as a quick-release plate, or attachment of photographic accessories with clamps.

Furthermore, finder bases are provided on both sides, allowing for simultaneous attachment of multiple guide scopes, finder scopes, and photographic computers.

■Main Specifications Aperture: 50mm Focal Length: 190mm Aperture Ratio: F3.8 Optical System: 4 elements in 4 groups, Petzval APO (using 1 SD glass element) Image Circle: APS-C (optimized for 1-inch sensors) Overall Length: 147mm (with hood retracted) / 182mm (with hood extended) Weight: 1.4kg (including tube rings and plate) Camera Mounting: M48 x 0.75mm male Back Focus: 50-65mm compatible (recommended connection length 55mm) Focuser: Straight-line helicoid focus (compatible with MXL belts, compatible with motorized focusers), extension approx. 15mm Filter: 52mm filter can be mounted in front of the objective lens / 48mm filter mounting thread built into the eyepiece adapter Field of View Rotation: 360° scale included Accessories: Instruction manual, warranty For astrophotography, the size and weight of the telescope tube, the need for additional corrective lenses, and the hassle of setup can often be barriers to entry.

The 50P features a bright 50mm aperture, F3.8 Petzval optical system condensed into a telescope tube approximately 147mm long and weighing 1.4kg. Its self-flat design eliminates the need for corrective lenses, allowing for easy and professional-grade astrophotography with cameras of APS-C size or smaller.