Vixen Teleconverter Extender PH Kit for R200SS (83404)

The Vixen Teleconverter Extender PH Kit for R200SS is a high-quality extender lens system made in Japan and specifically designed for astrophotography. This kit transforms the R200SS parabolic mirror Newtonian reflector, converting it from an f/4 system to an f/5.6 astrograph by increasing the focal length from 800 mm to 1120 mm (a 1.4x extension). The optical design consists of four elements in three groups, effectively correcting coma errors and delivering sharp images all the way to the edge of the field of view.

This kit is ideal for astrophotographers seeking enhanced focal length, sharpness, and image quality with their Vixen R200SS telescope, while also offering options for high-quality visual observation.

Key Features

Focal Length Extension:
The kit increases the focal length of the R200SS from 800 mm (f/4) to 1120 mm (f/5.6) with a 1.4x magnification factor.

Optical Design:
Features a 4-element, 3-group structure that corrects coma and ensures sharpness across the entire image, including the edges.

Full-Frame Compatibility:
Illuminates a 44 mm image circle, making it suitable for full-frame cameras.

High Light Transmission:
Uses advanced anti-reflective AS coatings, the same as those on Vixen’s high-end VSD 100 f/3.8 astrograph, providing 99.9% light transmission per lens surface.

Versatile Use:
When combined with the eyepiece adapter, it can be used for visual observations with 31.7 mm eyepieces. With a 50.8 mm eyepiece adapter, it functions as a high-performance Barlow lens, eliminating coma and aberrations across the field.

Minimized Light Loss:
The interior surfaces are fully matte, reducing light loss, ghosting, and scattered light to a minimum.

Specifications

• Extension of focal length: 1.4x

• Number of lenses: 4

• Number of groups: 3

• Fully corrected field: 44 mm

• Light transmission: 99.9%

• Telescope connection: M48

• Camera connector: M56

• Filter thread: Yes

• Type: Teleconverter

• Build: Tele-extender

• Weight: 245 g

• Length: 128 mm

• Diameter: 56 mm