TS-Optics Doublet SD-Apo 80 mm f/7 - FPL-53 / Lanthanum Objective

TS Photoline 80 mm f/7 FPL53 Doublet Apo Refractor

The Photoline apo from TS-Optics offers a very good performance in virtually every area of observation and astrophotography. The imaging quality sets standard in this class. In the lens, the "extra low dispersion" glass FPL53 from Ohara (Japan) is used, combined with lanthanum glass. This high-quality apo element and the relaxed focal ratio of f/7 allow for an image virtually free of chromatic aberration. Through the doublet lens, a faster cooling is achieved, too.

Best mechanics ensure an outstanding imaging performance for years and success in astrophotography

Even the best optics can only be successfully used if the machanics is right. Here, savings are often made at the wrong end. This is not the case for the Photoline 80 mm f/7 apochromat.

Advantages and features at a glance:

Ball bearing mounted focuser with rack and pinion drive. The bearing is decoupled from the adjustment of the draw tube.

Oversized draw tube with 60 mm clear aperture for full illumination even at full-frame format.

1:10 dual speed transmission for ultra-precise focusing

High-quality tube with internal baffles and very good internal blackening - nodisturbing stray light

M63x1 thread (female) allows for firmly screwed adaptions for astrophotography

The dew shield can be retracted - then, the transportation length is only 46 centimetres

Multi-coated state-of-the-art two element lens with FPL53 as APO element and lanthanum glass as second element

High-quality CNC rings and GP style dovetail bar with photo thread

Astrophotography with the TSAPO80F7

The Photoline SD-APO 80 mm f/7 is suited for astrophotography without any restrictions, but, as with every fast refractor, the field has to be corrected for obtaining perfectly round stars at the edge. We offer the following possibilites, the correctors are linked in the "recommended accessories" section:

TSFlat25DEL - universal 2.5" field corrector without focal length change: The corrector is suitable for all sensors up to full format. The corrector is screwed directly to the M63x1 female thread of the focuser. The working distance from the M48 connection thread to the camera sensor is 65 mm. If you are using a camera with 55 mm flange focal distance, such as an SLR with T-ring, you will still need a 10 mm M48 extension # TSVF210.

TSREDJM63S - 0.8x image field corrector with focal length reduction: The corrector reduces the focal length to 448 mm and improves the focal ratio to f/5.6. The corrector is directly screwed to the M63x1 female thread of the focuser. The working distance from the M48 thread to the sensor is 57.6 mm. If you use a camera with 55 mm flange focal distance (distance from the connection thread to the sensor), then simply turn the fine adjustment out by 2.6 mm and you have the perfect distance. There is no need for an adapter battle.

Astrophotographic results obtained with this telescope on Astrobin

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

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

Reports and images by testers Florian Stürzer and Simon Stich aka galacticdudes

The two dedicated amateur astronomers from Grafing tried out the TSAPO80F7 refractor with the two correctors TSRed279 and TSFLAT2, using a Canon EOS 60D.

The test reports in German language can be found as PDFs here:
Testing the TSAPO80F7 refractor with the TSFLAT2 flattener.
Test of the TSRed279 reducer.

The images clearly show the potential of the combination:

Flame Nebula and Horsehead Nebula (NGC 2024 and B 33)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Flattener & field corrector: TSFlat2
Filter: none
Sensitivity: ISO 1600/33
Frames: 19x 300 s


Pleiades (M 45)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Flattener & field corrector: TSFlat2
Filter: none
Sensitivity: ISO 1600/33
Frames: 38x 180 s
Note: Possibility of comparison with the following image taken with TSRed279


Pleiades (M 45)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 22x 180 s
Note: Possibility of comparison with previous image taken with TSFlat2


Heart Nebula (IC 1805)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 22x 450 s


Pelican Nebula (IC 5070)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 10x 450 s


Lagoon Nebula and Trifid Nebula (M 8 and M 20)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 22x 300 s


Andromeda Galaxy (M 31)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 20x 300 s


Triangulum Galaxy (M 33)
Photographers: Florian Stürzer and Simon Stich
Telescope: TSAPO80F7 on mount Orion Atlas EQ-G
Imaging camera: Canon EOS 60D
Corrector & reducer: TSRed279
Filter: none
Sensitivity: ISO 1600/33
Frames: 15x 450 s

Many thanks to Florian Stürzer and Simon Stich from Germany for these wonderful images!

Image result of our customer Lothar Scherp

Objekts: M35 and NGC2158 (image detail)
Telescope: TSAPO80F7
Flattener: TS-Optics
Camera: Canon EOS 80D
Sensitivity: 800 ASA
Exposure: 11x 35 s
Filter: none
Mount: Skywatcher EQ6 Pro (from set C9NEQ6Goto)
Guiding: none
Original review: "The small refractor delivers very sharp stars over the whole image and high magnifications of image sections are no problem. I have included an image section of M35 as an example.
NGC2158 is nicely resolved and the double star ADS4744 is cleanly separated. All my images so far have been taken without guiding and without filters using the Canon EOS 80d."

Many thanks to Lothar Scherp for this very informative photo and short report!

Images by our customer Omer Baram

Our customer Omer Baram from Yoqneam Illit" (Israel) took some nice photos with this telescope in the desert:

Object: Monkey Head Nebula (NGC 2174)

Photographer: Omer Baram
Observation site: Desert near Yoqneam Illit (Israel)
Telescope: TS Photoline Doublet SD-Apo 80 mm f/7 - FPL53 (TSAPO80f7)
Filter: Svbony CLS (alternative: TSCLS2) and/or Optolong L-eNhance (OPL-13802)
Imaging camera: Nikon D3400 full spectrum moded
Guide scope: Svbony 60 mm guide scope (alternative: TSL60D)
Guiding camera: ZWO ASI120MM Mini (ASI120mini)
Mount: Skywatcher EQM 35 PRO (EQM-35)
Polar finder: ALCCD QHYCCD PoleMaster (Polemaster)


Object: Rosette Nebula (NGC 2237)

Photographer: Omer Baram
Observation site: Desert near Yoqneam Illit (Israel)
Telescope: TS Photoline Doublet SD-Apo 80 mm f/7 - FPL53 (TSAPO80f7)
Filter: Optolong L-eNhance (OPL-13802)
Imaging camera: Nikon D3400 full spectrum moded
Guide scope: Svbony 60 mm guide scope (alternative: TSL60D)
Guiding camera: ZWO ASI120MM Mini (ASI120mini)
Mount: Skywatcher EQM 35 PRO (EQM-35)
Polar finder: ALCCD QHYCCD PoleMaster (Polemaster)


Object: Pleiades (M 45)

Photographer: Omer Baram
Observation site: Desert near Yoqneam Illit (Israel)
Telescope: TS Photoline Doublet SD-Apo 80 mm f/7 - FPL53 (TSAPO80f7)
Filter: Svbony CLS (Alternative: TSCLS2)
Imaging camera: Nikon D3400 full spectrum moded
Guide scope: Svbony 60 mm guide scope (alternative: TSL60D)
Guiding camera: ZWO ASI120MM Mini (ASI120mini)
Mount: Skywatcher EQM 35 PRO (EQM-35)
Polar finder: ALCCD QHYCCD PoleMaster (Polemaster)

Many thanks to Omer Baram for these lovely images!

Photographs made by our customer Sotiris Savvides

Our customer Sotiris Savvides from Cyprus took a nice photo with this telescope:

Object: Lagoon Nebula (NGC 6523, M 8)

Photographer: Sotiris Savvides
Capture date: 2023-06-16
Observation site: Cyprus
Telescope: TS Photoline Doublet SD Apo 80 mm f/7 - FPL53 (TSAPO80f7)
Filter: Optolong L-Pro (OPL-LPRO1, OLP-LPRO2)
Imaging camera: ZWO ASI1600MC (alternatives: 0510500 or OM61045)
Mount: Celestron Advanced VX (AVX-GOTO)

Many thanks to Sotiris Savvides for the nice photograph!