TS-Optics REFRACTOR 0.79x 2" ED Reducer Corrector für APO und ED

The TS 2" PHOTOLINE 0.79x corrector / reducer is an improved design of the well known Riccardi reducser.

Its four element design offers good field correction superior to cheap 0.8x reducers.

For friends of screwed solutions, an additional M54x0.75 external thread is available at the end of the 2" socket. Many focuser already have a corresponding internal thread. Via adapters you can also adapt the TSRED279 to focuser with other threads.

Back Focus - distances from the T2-thread to the camera sensor

depends on the focal length of the telescope:

♦ Focal Length to 350 mm .... 70 mm
♦ Focal Length to 420 mm .... 65 mm
♦ Focal Length 450-500 mm ... 61 mm
♦ Focal Length 510-600 mm ... 58 mm
♦ Focal Length 610-700 mm ... 57 mm
♦ Focal Length 710-790 mm ... 56 mm
♦ Focal Length from 800 mm .. 55 mm


IC 1396 through TS Photoline 60mm with TSRED279 Reducer - Andrew Harrison

First light image from the scope of the relatively faint emission nebula IC1396 is shown left.

This is a total integration of 2 hours (6 x 20 min sub-exposures) which indicates the potential of this scope for capturing extended nebula regions at great depth with speed.

♦ Field correction: Photoline Reducer TSRED279
♦ Camera: QSI 583wsg
♦ Filter: Baader H-Alpha 7 nm filter
♦ Exposure time: 6x 1200 seconds

♦ 2" Reducer / corrector with dust cover for the 2" barrel
♦ Gift box

 
The newest reviews:

(7 reviews)

* * * * *
2018-05-01 23:17:41, Greg Watkins

"Like all of their stuff at this built really well and performs excellently. ***"
 
 

* * * * *
2018-02-10 17:22:07, Rafal Ossowski

"very good quality"
 
 

* * * * *
2017-12-14 12:17:06, Marius Dinga

"Great quality. The additional M54 thread is very useful."
 
 

* * * * *
2017-11-29 09:54:03, Ian Whiteley

"A very high quality focal length reducer that performs above expectation"
 
 

* * * * *
2017-11-15 15:13:17, Vincent Grosjean

"Works as it should!"
 
 

* * * * *
2017-02-14 16:51:26, Louise Williams

"Works very well - nice flat field with a dslr"
 
 

* * * * *
2016-01-13 01:31:25, Yasuhisa Fujita

"Superior performance for 330mm f.l. refractor compared to 2 element reducers."
 
 

Photo Results made with the TSRED279 Photoline reducer and corrector:

TS Photoline 60mm with TSRED279 Reducer - Andrew Harrison

I am now experimenting with a short focal length 60mm refractor for wide field imaging having given up on camera lenses. This is the Telescope Service Photoline 60mm compact apochromatic refractor in combination with the matching Photoline 0.79x reducer.

The objective is a 60mm apochromatic ED doublet lens with a FPL-53 element by Ohara Japan. With a native focal length of 330mm the scope has a focal ratio of F/5.5. Using the Photoline 2 inch 0.79x 4-element reducer / corrector the focal length is reduced to 260mm and the scope is transformed into a F/4.2 astrograph.



IC 1396 through TS Photoline 60mm with TSRED279 Reducer - Andrew Harrison

First light image from the scope of the relatively faint emission nebula IC1396 is shown left.

This is a total integration of 2 hours (6 x 20 min sub-exposures) which indicates the potential of this scope for capturing extended nebula regions at great depth with speed.

♦ Field correction: Photoline Reducer TSRED279
♦ Camera: QSI 583wsg
♦ Filter: Baader H-Alpha 7nm filter
♦ Exposure time: 6x 1200 seconds

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!

Question:
How do you have to measure the working distance

Answer from Teleskop-Service:
The working distance is measured from the beginning of the connection thread on the housing of the corrector (see example picture):