Astro-Tech 0.8x reducer/field flattener for Astro-Tech AT130EDT triplet apo refractor Version II


Availability: In stock

This economical 0.8x focal reducer and field flattener is designed specifically for astrophotography with the Astro-Tech AT130EDT 130mm f/7 triplet apo refractor.
Our Product #: ATREDT30V2
Astro-Tech Product #: ATREDT30V2
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Product Description

This Astro-Tech #ATREDT30V2 0.8X focal reducer/field flattener is designed specifically for prime focus astrophotography with the Astro-Tech AT130EDT apo refractor. While it may also thread in and work well with other brands and models of f/7 refractors that use a 2.5" focuser, its performance with other scopes is not guaranteed.

The fully-multicoated Astro-Tech #ATREDT30V2 reducer/flattener converts the 910mm focal length f/7 Astro-Tech AT130EDT refractor into a 728mm f/5.6 system for faster and wider field astronomical and terrestrial photography.

In addition to reducing the focal length of the telescope and thereby increasing the photographic speed, the #ATREDT30V2 flattens the normal field curvature inherent in all refractors. This provides images that are sharply focused out to the corners of DSLR and CCD imaging chips. Stars look sharp and point-like all the way across the field in your images. You don't have to worry about photos that are sharp in the center and blurry at the edges.

The Astro-Tech #ATREDT30V2 reducer/flattener threads into the focuser, or camera angle adjuster for a secure connection.  The threading is metric 63x1.

The camera side of the #ATREDT30V2 reducer has 48mm T-threads to connect to a T-ring and DSLR camera body. A slip-on soft rubber cover protects the T-threads when the reducer is not in use, while a second slip-on cover is provided for the 2" scope-side barrel. Back focus is 55mm from the shoulder of the reducer to the image plane, the standard spacing for DSLR camera bodies.

The top of the reducer/field flattener will unthread from the body exposing a 48mm filter holder on the underside of the cap that was just unthreaded.  This will allow you to thread 2" filters into your imaging train.

If you have a black focuser body on your AT130EDT this reducer will not work with that scope.

Tech Details

Weight 8 oz.
Warranty 1 year


Review by:
I just captured one of my first images using the AT130EDT and this flattener with my ASI2600MC (APS-C sized sensor) and I have to say this flattener does a beautiful job with the stars. I've recently been shooting with SCTs (and reducer/correctors) due to it being Galaxy season and sometimes it was so frustrating with how much I had to crop to get rid of aberrations. With AT130EDT and this flattener, it was like a breath of fresh air. The only cropping I had to do was very minimal and only because of image shift between each nights shot and dithering. The stars looked great throughout.
Would def buy this again.
**Image I captured using this combination: (Posted on 6/17/2023)
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