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Takahashi Announces Extenders for the Epsilon-130D and Epsilon-180ED Reflectors

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Takahashi Announces Extenders for the Epsilon-130D and Epsilon-180ED Reflectors

Takahashi has released a series of 1.5X extenders for the Epsilon series of telescopes. Models for the Epsilon-130D and Epsilon-180ED are available for immediate purchase with delivery of the initial units expected in May. The model for the Epsilon-160ED will be available later in 2021.

Takahashi has released a series of 1.5X extenders for the Epsilon series of telescopes. Models for the Epsilon-130D and Epsilon-180ED are available for immediate purchase with delivery of the initial units expected in May. The model for the Epsilon-160ED will be available later in 2021.

 

The extenders provide a 1.5 times increase in focal length and are comprised of 7 optical elements in 5 groups. This design provides ultra-high performance that corrects coma aberration on each the model of Epsilon telescopes. Even at the extended focal length, the star image is equal to or better than that obtained at the native focal length of the telescope.

 

In all models, the extender provides an RMS spot size of 2 microns or less at the center of the field, and 8 microns or less at the diameter of a full frame sensor (44 mm).

 

Below are other technical details of the new extender for the Epsilon-130D and Epsilon-180ED models. Details for the Epsilon-160ED will be announced separately.

 

 

εExtender 130D

εExtender 180ED

Model

ε-130D

ε-180ED

Focal Length

650mm

770mm

F value

5

4.3

Image circle

Φ44mm

Φ44mm

Optical System

5 elements 7 groups

5 elements 7 groups

Maximum diameter total length

72.1mmx98.5mm

78.5mmx105.5mm

OTA side thread

M60 P-0.75

M68 P=0.75

Camera side thread

M54 P=0.75

M54 P=0.75

Weight

450g

550g

 

Spot Diagram:  E-130D with 1.5X Extender (100 micron box)

 

Spot Diagram:  E-180ED with 1.5X Extender (100 micron box)

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