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Astro-Tech AT60EDP 60mm f/5 Dual ED Petzval OTA

Regular Price: $849.00

Special Price $699.00

Availability: In stock

This unique Astro-Tech apochromatic ED petzval fast focal ratio refractor has an incredible flat field for your astro-photography endeavors. 

Our Product #: AT60EDP
Astro-Tech Product #: AT60EDP
 

Product Description

This Astro-Tech AT60EDP refractor astrograph has:

• 60mm f/5 fully multicoated four-lens Petzval refractor
• Two ED lens elements, FCD-100 and FK-61
• 44mm corrected image circle
• amazing flat field astrophotographic capabilities
• dual-speed 2.8" rack-and-pinion focuser with 10:1 ratio fine focusing
• 48mm t-thread focuser back
• rotating camera angle adjuster
• Mounting Shoe with Vixen Style Dovetail and top handle
• sliding lens shade
• finderscope mounting shoe

This unique apochromatic ED petval refractor astrograph has a four lens fully-multicoated optical system. It uses two ED elements in its configuration, and has a wonderful flat field inherent in the petzval design.  

The Astro-Tech AT60EDP astrograph provides an exceptionally flat field for very wide images that are sharp edge-to-edge, with no need for a separate field flattener. This instrument is designed as an astrograph.  It can't be used visually.

Astro-Tech uses two ED (Extra-low Dispersion glass) elements in the optical design of the AT60EDP. The result is the finest possible control of spurious color, for images that are free of all vestiges of the annoying faint color halos around bright objects visible in lesser scopes. 

Those exceptional optics are even more impressive when you consider the package they come in. The finely-machined AT60EDP has a dual speed 2.8" rack-and-pinion focuser with a microfine 10:1 fine-focusing ratio. The standard equipment camera angle adjuster rotates a full 360° for the most pleasing photographic compositions. The rear of the instrument is threaded so you can have the most secure connection possible.  The scope is as portable as portable can be.  With a tube length of 10.5" with the dew shield retracted or 12.75" with it extended, and fitting in a carry case that is 8.5" x 8.5" x 13", you surely won't notice it taking up much space wherever you go.  Weighing in at 6 pounds 14 ounces you can feel the quality of the instrument.

Features of this Telescope . . .

Apochromatic petzval Dual ED refractor optics: the objective lens is a 60mm (2.36") aperture, 300mm focal length, f/5 focal ratio petzval using two elements of ED (Extra-low Dispersion glass), one FCD-100 and the other is FK-61, to reduce spurious color halos and fringing to vanishingly low levels. The petzval design has an extremely flat field to eliminate the curved field typical of fast focal ratio doublet and triplet refractors. Stars are focused and point-like to the edges of the field. This eliminates the need to buy the separate external field flattener that most refractors need to provide flat field images.  The AT60EDP produces a 44mm image circle.

Fully multicoated optics: All lenses have the latest state-of-the-art antireflection multicoatings matched to their glass types on all air-to-glass surfaces for high light transmission and excellent contrast.

Dew shield: A self-storing retractable dew shield slows the formation of dew on the lens in cold weather to extend your undisturbed observing time. It also improves the contrast, similar to the effect of the lens shade on a camera lens when there is excessive ambient light at night, such as a neighbor's backyard security light. 

Dual speed 2.8" rack-and-pinion focuser with threaded camera connection: The precision-made rack-and-pinion focuser has dual-speed focusing. There are two coarse focusing knobs. The right knob also has a smaller concentric knob with 10:1 reduction gear fine focusing ratio. This provides exceptionally precise image control during critical imaging. The focus knobs have ribbed gripping surfaces so they are easy to operate, even while wearing gloves or mittens in cold weather.

The 2.8" focuser drawtube terminates in a built-in camera angle adjuster as standard equipment. It is not an optional extra-cost accessory, as it is with some other scopes. The camera angle adjuster lets you rotate your camera allowing you frame your image however you like. A knob on the camera angle adjuster lets you lock the focuser at whatever angle provides the most pleasing photographic composition.

The 2.8" diameter focuser drawtube has a scale marked in 1mm increments, with 20mm of travel, so you can note individual focuser positions for easy return to the approximate correct focus when switching between visual use and photography or when switching between cameras. A lock knob under the focuser lets you lock in your photographic focus. The 48mm t-thread back will unthread from the camera angle adjuster allowing you to thread a 28mm/2" filter into the underside of the back that you just unthreaded.

Tube finish: The optical tube and lens shade are finished in a matte black accented with a silver trim ring.

Tube rings and dovetail: The AT60EDP comes with a mounting shoe that attaches to a Vixen-style dovetail.  They will also let you attach the rings to optional Vixen- or Losmandy-style dovetail adapters for piggybacking the AT60EDP on top of a larger scope. The AT60EDP also comes with a handle for ease of mouting and carrying the instrument around.  The handle has arca-swiss capabilities.

Other supplied accessories: A slip-on metal dust cap is standard. There is a dovetail shoe on the upper left side of the optical tube for installing an optional multiple reticle red dot finder such as the Astro-Tech #ATF, using a #ATFBV base.  A carry bag is also standard equipment.

Tech Details

Aperture 2.36"
Focal Length 300mm
Focal Ratio f/5
Galaxy and Nebula Observation No
Lunar Photography Yes
Photography Yes
Planetary Photography Yes
Resolution 1.78 arc seconds
Star Cluster / Nebula / Galaxy Photography Yes
Telescope Type Refractor
Terrestrial Photography Yes
Visual Limiting Magnitude 11.6
Warranty 1 year
Back Focus 55mm

Reviews

Review by:
I'm entirely happy with the mechanics and finish of the AT60EDP. The focuser and camera rotator rings have virtually no play and are not overly firm to adjust. The finish of the AT60EDP is first rate. The glass coatings are even and show no signs of being mis-applied. Thus far, I've been imaging mostly open and globular clusters (waiting for galaxy season to start) and the clarity and sharpness of this Petzval design is first rate. I'm able to reach deeper into the images to resolve and bring out the fainter stars which I never could before. I attribute this to the ED glass and Petzval design. My ultimate targets are wide-field nebulae and molecular clouds. I'm sure the AT60EDP will perform admirably when those targets are in better position. If one is looking for a capable astrograph in this aperture range, I heartily recommend this little Petzval gem of a 'scope. (Posted on 4/18/2024)
Review by:
Great job on this one. It really has nice wide angle view. (Posted on 4/1/2024)
Review by:
So after buying and selling several wide field scopes I ended up buying this when it was on sale I think the price is still the same. The scope is amazing no more dealing with back focus issues or flatteners I just put a camera on the back and things work great. The color is amazing I get no chromatic aberration. Things you should know about the scope it does weigh about 7 lbs. That's expected because it has a flattener and a reducer or whatever it is all built into the scope. It's a quality piece of equipment, there is a bit of a trade-off in that it's never going to be any faster than the F5 that it is. That's not a terrible speed but in today's standards it's not lightning fast either, I'm okay with that because the faster scopes all also tend to have some issue with color correction. This is crystal clear. I did a lot of research between this scope and the redcat. When comparing the RedCat 51 to this scope it was a pretty close comparison you just get a better resolution with the bigger aperture from this scope, when you compare the redcat 61 to this it's really close in specs, but the red cat costs twice as much. I'm super happy with this scope. I've tried it with several cameras The largest sensor I've used is the ASI 2600 MC, which is an aps-c crop. There is no vignetting, and the image circle is completely filled. I would guess this will fill a full frame sensor as well I just haven't tried it yet. (Posted on 3/29/2024)
Review by:
I purchased the Astro-Tech AT60EDP looking for a widefield scope to take images of vast areas of the sky. Was also looking to not have to hassle with focal reducers and the tedious spacing that is sometimes required. Did I get that with the AT60EDP....... yep, I absolutely did. This scope works beautifully with my ASI2600MM-Pro with pinpoint stars across the entire field. Just attach your camera and start imaging! The build quality is fantastic with a solid and smooth focuser. This is a solid piece of astro gear that you will be happy to own. Highly recommend! (Posted on 1/3/2024)
Review by:
I have a pretty good setup, a RASA8, an Esprit 120mm, and a TV-85, but I liked some of the wider field views I saw on NightSkiesNetwork.com and posted on the web. People whose advice I often take were pointing me at the Red Cat and the Askar FRA300. Then I saw the AT60EDP on sale and thought why not? I ordered one along with adapters to fit a GGE rail and a ZWO focuser. Shipment was prompt and the box arrived with the usual signs of gentle handling but no damage.
The only issue, and it was minor, was that the handle was not aligned with the scope. Two minutes work to fix and then I mounted it on top of the RASA 8.
With a Player One Poseidon (IMX572) camera installed I grabbed some frames and put them through the CCD analyzer in ASTAP - the report was trivial tilt and round stars in the corners. So far, I've used the scope with two filters, an SVBony220 (dual narrow band) and an Antlia quad-band. I am well pleased with this scope. I have to remind myself that it is an f/5 and not an f/2 RASA but give it some time and the result is very pleasing. Some areas just beg for a wide field view.
The focuser and the rotator both work just as they should. As promised the ZWO focuser was an easy to install. (Posted on 12/2/2023)
Review by:
I've bought a lot of Astronomy Equipment and you usually get what you pay for. However, this little scope far exceeded my expectations. First, its construction is solid as a rock making it a bit heavy but manageable. Everything works as it should from the two speed focuser to the extending dew shield. I received it yesterday and really wanted to try it out on a clear Moonless night like last night. I have a C11 Edge HD and Astro-Physics 130 Starfire mounted side by side and found a place between them on the AP 1100 GTO mount. Not wanting to disturb my Flat recordings on the ZWO cameras I mounted an old Canon 60-Da on the AT60-EDP. Then shot several wide field views of different nebula. The results were great. Round stars to the edge of the field as promised. Color far exceeded what I was expecting and the ability to focus with a small focusing mask was very easy. Overall, a true five star value in performance, construction and price. (Posted on 10/19/2023)
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Supplied Accessories

  • Dust covers
  • Tube rings
  • Vixen-style dovetail
  • Rotating camera angle adjuster
  • 2" and 1.25" compression ring accessory holders
  • Finder scope mounting shoe