Skywatcher Explorer 250 PDS

The new Skywatcher Explorer 250PDS offers essential benefits for astro photography: a 2" Crayford focuser with 1:10 double-speed transmission and enough back focus for almost any camera on the market. Of course, the system is diffraction limited and has a parabolic main mirror.

Its large aperture is perfect for visual observation, it collects almost 3 times more light than a 114 and its focal length associated with good eyepieces will allow you to observe the planets comfortably. Most deep sky objects will be accessible to you, NGC, Messier, nebulae, galaxies.
The two-speed Crayford 2" focuser:


The new 2" focuser provides precise focusing capability for astrophotography. The mechanical rigidity is very good. Even 2 kg cameras are securely held. A 1.25" reducer is included.
The flexibility and precision of this device make it an ideal tool for visual observation.

The advantages of the Explorer-250PDS:

• Diffraction-limited, parabolized optical system for sharp, high-contrast imaging/observation
• 2" Crayford focuser with 1:10 dual-speed transmission and M54 female thread - ideal for astro photography
• Remote focus allowing the use of all main cameras (including APN)
• Solid metal tube
• Well-sized secondary mirror (63 mm secondary axis) for good field illumination

The advantages

• Fairly high optical power thanks to the 250 mm aperture
• Structure not very sensitive to vibrations and wind
• Parabolic primary mirror with limited curvature effect
• High-contrast images thanks to thin attachment arms and a small secondary mirror
• Bright optics for good results in astrophotography

Features

• Optical formula: Newton
• Primary mirror: parabolic
• Secondary mirror: plane
• Focal length: 1200mm
• Focal ratio: f/4.8
• Mirror: Pyrex
• Resolving power: 0.45"
• Limit magnitude: 14.1
• Construction: Metal
• With dovetail and two clamps
• Focuser: Crayford 50.8/31.75mm Sky-Watcher with microfocuser (dual speed 1:10)
• Dimensions (Diameter x Length): 28.8cm x 112cm
• Weight: 16kg