Takahashi Ortho Extender 4x

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About this product

Takahashi Ortho Extender 4x

The newly released Ortho Extender 4X is optically designed to magnify the TOA aberration-free image by four times. If you attach it to the TOA-130 telescope, you get a focal length of 4000mm at f/30, making it an almost aberration-free magnification photography method that is perfect for photographing the Moon and Planets.

The Ortho Extender 4x is optically designed to work best with telescopes with a focal ratio between f/8 and f/10.

The mounting method and accessories are the same as the Ortho Extender 2X.

Telescope side is an m43x.75 screw thread and eyepiece side an M42x.75 T thread and a 31.7mm (1.25")  eyepiece opening.

Please see the System Diagram in the manual for configuration options. It can be downloaded here.

It is possible to maintain the approximate magnification of 4x even when using a single-lens reflex camera or an ADC.

Specifications

Lens configuration: 4 elements in 2 groups

Magnification rate: 4x

Image circle: φ30mm (good image range)

Lens barrel side installation: M43P0.75 screw

Camera side installation: M42P0.75 screw/φ31.7 sleeve insertion

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