Overview & Optics
The Epsilon-130D is a wide-field astrograph (modified hyperbolic Newtonian + corrector) made by Takahashi.
It features a 130 mm aperture, focal length of 430 mm, giving f/3.3 focal ratio, which means it’s quite “fast” (captures light quickly) and good for wide-field deep sky imaging.
The imaging circle (the usable flat field where stars stay sharp at the edges) is about 44 mm in diameter. That supports full-frame sensors without serious edge distortion.
Cost: Because of premium optics, machining, brand reputation, it’s a high-end instrument; price is significantly higher than “entry” astrographs of similar aperture.
Mount Requirements: To take full advantage, you’ll want a mount with good guiding capability (e.g. accurate tracking), because at f/3.3 and with full-frame sensors, you’ll be more sensitive to tracking / guiding errors.
Weight & Portability: While 4.9 kg is reasonably portable, with all accessories (camera, flattener/corrector, guidescope etc.), the full rig becomes heavier. Not “backpack light” unless pared down.
Focal Length Light Focusing & Collimation: Fast astrographs tend to require more precise collimation / alignment; although Takahashi has made design choices (collimation marks, corrector etc.) to ease this, there’s still a learning curve.
Astrophotographers who want to shoot wide field objects — nebulae, large star clusters, the Milky Way, comets.
Users with full-frame or large sensors who want good image quality even near the edges.
Those who value optical quality, sharp stars, stable mechanical build, and who are willing to invest in good mount / guiding.
Observers who transport gear to dark sky sites but still want performance — the Epsilon-130D is relatively portable for what it delivers.
Specifications
Telescope Specifications
Epsilon 130D System Chart
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