Slightly used: Sharpstar 61EDPH III 61 mm f/4.4 Apochromat (using 0.75x Reducer)

Sharpstar 61EDPH III 61 mm f/4.4 Triplet Apochromat (using 0.75x Reducer)

The Sharpstar apo refractor with 61 mm aperture and the fast focal ratio of f/4.4 is a solid and fast optic for astrophotography. The refractor enables deep astro images with relatively short exposure times and is corrected up to full frame format thanks to the 0.75x reducer and corrector.

Astrophotographic results achieved with this telescope on Astrobin
Here you will find some astrophotographs taken with this telescope: Link to Astrobin

Further information about the 61EDPH bundle:
The objective of the 61EDPH III is an air-spaced triplet APO design. This means you can expect good chromatic correction even with bright stars. Together with the 0.75x reducer, the 61EDPH III forms a powerful telescope for astrophotography. The combination has a focal length of 270 mm, a focal ratio of f/4.4 and corrects the 44 mm full-frame image circle.

A multifunction handle, which also offers a finder shoe, further enhances the apo. Furthermore, the 61EDPH III is equipped with a 200 mm long Vixen style dovetail bar, which allows easy connection to equatorial mounts and accessories and makes the OTA easier to balance on the mount. The tube features high-quality CNC machining, a high-quality surface coating and a polished anodized finish - elegant and durable.

0.75x image field corrector - included in the scope of delivery:
The 4-element corrector and reducer corrects the field up to full format and also illuminates it well.On the telescope side, the corrector is screwed to the focuser via an M68×1 female thread. The other end of the reducer has a male M48×0.75 thread with a built-in 2" filter thread. The back focus is 55 mm. If it is to be enlarged, the reducer can be split to expose an M54×0.75 internal thread. The back focus is then 75 mm.

The optional 1.0x corrector for more focal length - SHFLAT61:
The 270 mm focal length is often too short and you want a little more focal length for more resolution. For this purpose, we offer the 1.0x corrector specially designed for the 61 mm objective. Simply screw the 1.0x SHFLAT61 into the focuser instead of the reducer and you have the full 360 mm focal length of the objective at your disposal. The flattener offers correction and illumination up to full format, too.

Testimonial from a customer

Our customer Bernd Gooßmann has taken a great astro image and wrote a field report based on it:

Object: Sh2-119 ("Clamshell Nebula") in Cygnus

Photographer: Bernd Gooßmann
Shooting location: Emberger Alm, Carinthia (Austria)
Imaging telescope: Sharpstar 61 EDPH-III (61EDPH-BUNDLE at f=360 mm)
Filters: Astrodon 3 nm H-alpha and O-III
Imaging camera: ZWO ASI294MM Pro (ASI294MMpro)
Exposure: 2 h 55 min (18x5 min H-alpha, 17x5 min [O III])
Image processing: DeepSkyStacker, PixInsight
Guide scope: ArteSky 32/130 mm guide scope (alternative: ULTRA-32MKII)
Guiding camera: ZWO ASI120MM Mini (ASI120mini)
Mount: Bresser EXOS-2 (4964350)

Here is the field report:

"The very simple conclusion to the 61 EDPH-III : A telescope that is really fun!!! A crisp sharp image right into the corners! And that even at 270 mm with the full-frame Canon 6Da!
I am absolutely thrilled with the performance of this telescope and can really highly recommend it!!! On the photo of SH2-119 even the planetary nebulae We2-245 and Outters 5 are visible in detail. A really incredibly great optical performance for this "little thing"!
Also in the handling the 61 EDPH-III shows itself really uncomplicated. It is mechanically very solid and elaborately built and also offers a lush 360° rotation. It´s easy and solid to use and holds focus even when rotating.
What I find really amazing is also the high temperature stability of the focus and the color fidelity of the lens. Even at 270 mm and full frame, I don´t detect any color distortion in the corners.
The Sharpstar 61 EDPH-III has been pleasantly easy to use in the shooting nights so far. Even the focus when using narrow band filters was straightforward to adjust manually.
It has become a faithful companion in a very short time!"

We thank you for the friendly field report and congratulate Bernd Gooßmann on the great image!

Technical Information

Teleskop-Service has collected a lot of helpful information about refractors and provided it in English as a PDF file: refractors.pdf

Safety informations: PDF Download