TS-Optics 115 mm f/7 EDT Triplet Apo with 2.5" RAP focuser and optics test

TS 115 mm f/7 ED Triplet Apo

The TS 115 mm f/7 ED triplet apochromat is a high-quality apochromatic refractor that combines outstanding optical performance with a compact and portable design. With its 115 mm aperture, it gathers about 30% more light than a comparable 100 mm refractor, thereby delivering visibly more detail when observing the Moon, planets, and faint deep-sky objects. The high-quality ED triplet objective featuring Japanese Ohara ED glass and a lanthanum glass element ensures excellent chromatic correction. Even at high magnifications, it produces sharp, high-contrast images without distracting chromatic aberrations. This makes the refractor equally suitable for demanding visual observation and astrophotography. The temperature-compensated and adjustable objective cell ensures consistently precise imaging performance even when outdoor temperatures fluctuate.

Perfect for astrophotography

The strong 2.5" rack-and-pinion focuser safely supports even heavy photography accessories and allows for precise focusing thanks to its sensitive 1:10 speed reduction. An optional 0.8x reducer can be attached directly via the integrated M63 thread. This shortens the focal length while simultaneously providing optimal field correction - ideal for modern astro cameras, DSLRs, and mirrorless cameras. We particularly recommend two correctors.

TSFLAT25Del The corrector is designed for full-frame sensors and can be screwed directly onto the M63 internal thread of the focuser. The working distance from the M48 thread to the camera sensor is 55 mm.

TSREDM63-115 The 0.8x field corrector is designed for the 115 mm f/7 triplet objective. It reduces the focal length to 644 mm and improves the focal ratio to a fast f/5.6. The working distance from the M48 thread is 55 mm (T-ring and DSLR camera). The corrector is directly screwed to the M63 internal thread of the apo.

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Impressive views at any magnification

Whether observing vast star fields with wide-angle eyepieces or the finest details on the Moon and planets - the TS 115 mm apo impresses with its high sharpness, excellent contrast, and true-to-life color reproduction. The high-quality optics deliver a steady and detailed image even at high magnifications.

With a suitable solar filter or Herschel wedge, the refractor is also ideal for safely observing the Sun´s surface. The 115-mm aperture also provides an excellent foundation for H-alpha observations.

Quality guarantee through an optics test by Teleskop-Service:

Every single apo is checked in our technical department before being put into storage to ensure consistently high product quality.

The mechanics are tested and the focuser is optimally adjusted.

The objective lens is inspected for cosmetic defects and cleaned. We also check that all counter screws are properly tightened; these often come loose during transport.

The optics are collimated and the result is verified on the optical bench. The telescope is assigned a serial number.

A complete optical test is carried out, the test report of which is included with the telescope (star images and a Ronchi test image taken on the optical bench in autocollimation).

Only then are the telescopes handed over to the warehouse and prepared for shipment.

Technical Information

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

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Photographic Results with the TS Photoline Apo 115/800 mm:

Great field correcture with the TSFLAT2 2" Flattener:

After my recent purchase of TS115 from your store I finally had a chance to do a real imaging test with it. I´m very happy with the performance of this scope with TSFLAT2 corrector (using suggested 111mm spacing). Sharp stars all the way to the edges on a APS-C size sensor, no false colors on bright stars etc. So I´m attaching an un-cropped image of M106 I took along with a picture showing corner stars. Please feel free to use these images in the product page if needed.

Thanks & regards,
Prem Kanakaraj


M106 - Galaxy goup

Sensor: APS-C Size

Image is uncropped

Mosaic with 100% perfect stars in the edges

Images from Wolfgang Ransburg through the Photoline 115 mm f/7 apo

NCG 6992/95 Cirrus Nebula - Supernova Remnant in constellation Swan.

Imaging camera: ATIK 383L+

Imaging telescope: Photoline APO 115 - image correction with TS Flattener (without focal length change)

IC5070 - Pelican Nebula in Swan.

Imaging camera: ATIK 383L+

Imaging telescope: Photoline APO 115 - image correction with TS Flattener (without focal length change)

Customer statement - Thorsten Temmel, 12.3.2017:

"A good refractor without chromatic aberration which not only shows its strengths at high field light intensity and 2´" eyepieces around the 40mm focal length, but is also a pleasure for open star clusters of the messier class. The price is acceptable. First of all I will use the refractor with its 2.5" focuser as a large field system on a double mounting on a CGX. An SC 9.25 will keep him company.

Two images of our customer Roger Kern

Messier 42, Orion Nebula - one of the most famous and popular objects in the winter sky.

Imaging camera Canon EOS 600D (modified)

Imaging telescope Photoline Apo 115 - corrector TSRED379

HDR image

Location, as in the following picture, 25 km away from Frankfurt a. M.

Messier 45, Pleiades - a near open star cluster in the bull.

Imaging camera Canon EOS 600D (modified)

Imaging telescope Photoline Apo 115 - corrector TSRED379

Three images taken by our customer Emanuele Bergamaschi from Oslo, Norway

Sh2-114, Flying Dragon Nebula - an emission nebula in the constellation Swan

Imaging telescope Photoline Apo 115 f/7

Antlia filters H-alpha and RGB

Imaging camera ZWO ASI294MM Pro

Exposure 145x 300 s for H-alpha and 65x 30 s for each RGB

Mount EQ6-R

NGC 1499, California Nebula - an emission nebula in the constellation Perseus

Imaging telescope Photoline Apo 115 f/7

Antlia 3.5 nm filters H-alpha and S-II

Imaging camera ZWO ASI294MM Pro

Exposure 140x 300s H-alpha and 60x 300 s for S-II

Mount EQ6-R

NGC 6888, Crescent Nebula - an emission nebula in the constellation Swan

Imaging telescope Photoline Apo 115 f/7

Antlia 3.5 nm filters H-alpha and O-III

Imaging camera ZWO ASI294MM Pro

Exposure 51x 300s H-alpha and 69x 300 s for O-III

Mount EQ6-R

Photograph by our customer Maicon Germiniani

Messier 20, the famous Trifid Nebula in the constellation Sagittarius

Imaging telescope TS Photoline Triplet Apo 115 f/7 (Apo115f7)

Focal reducer TS Photoline 0.79x Reducer Corrector (TSRed279)

Filters: Optolong H-alpha 7 nm (OPL-HA7-1) and Astrodon LRGB E Series Gen 2 (LRGB2_E27R)

Imaging camera ZWO ASI1600MM-Cool

Exposure 220 x 180 s = 11 h

Mount iOptron CEM60 (C70A - CEM70 as successor)

Two photographs taken by our customer Frank Lothar Unger from Bad Vilbel, Germany

[[kein Bild]]Comet C/2022 E3 (ZTF)

Imaging telescope Photoline Apo 115 f/7

Filter Optolong 2" UV/IR Cut

Imaging camera ZWO ASI294MC Pro

Exposure 53x 60 s

Mount Skywatcher AZ-EQ5-GT

[[kein Bild]]NGC 2158 and M 35, two open star clusters in the constellation Gemini

Imaging telescope Photoline Apo 115 f/7

Filter Optolong 2" UV/IR Cut

Imaging camera ZWO ASI294MC Pro

Exposure 64× 180 s

Mount Skywatcher AZ-EQ5-GT

Question:
How do I access the M68 and M63 connection threads?

Answer from Teleskop-Service:
To access the M68x1 internal thread, the 2" adapter must be unscrewed. The 2" adapter is secured by three small grub screws, which must be loosened first. To access the M63x1 internal thread, the M68x1 adapter must also be unscrewed from the extension tube. This adapter is also secured by three small grub screws. The adapter can only be unscrewed once these have been loosened

Safety informations: PDF Download