1.5x Extender for Epsilon Astrographs

$666 ~~$900~~ In stock

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 in mid July 2022.

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). Spot diagrams for the three models are attached to this announcement.

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

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy

If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy

Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Steven U. ★★★★★ Oct 20, 2026

I’d been worried the extra glass would soften my stars, but the 1.5x extender actually sharpened my globular clusters on the Epsilon-180ED. It locks in solidly with zero shift, and the delivery for the initial batch was surprisingly quick.

Emma ★★★★★ Oct 18, 2026

Finally got this extender for my Epsilon-180ED, and the image scale increase is exactly what my planetary shots needed. The build quality feels solid, and it coupled to the telescope without any fuss.

Richard ★★★★★ Oct 18, 2026

Using the 1.5x extender on my Epsilon-130D really tightened up the stars in the corners, and the build quality feels just as solid as the telescope itself. I’m already getting cleaner shots of smaller galaxies that used to look a bit too small.