Manufacturer: -TS Teleskope
Product number: IN152OTA

EUR 1.099,00RRP EUR 1.299,00you save 15.4% (EUR 200,00)


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rating: 5.0 of 5
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The TS RFT-152 mm f/5.9 Rich Field Refractor
This refractor is a great alternative to normal achromats. The refractor offers features that are normally not found in this class.
One of the best objectives with better chromatic correction than a comparable achromat. In Japan, this refractor is even sold as a semi-apo under the name Nerius. The glasses of the 2-element objective are K9 and F4.
A 2.5" rack-and-pinion focuser with many auxiliary threads that even allows connection of the TS full-frame correctors.
The refractor is still transportable. Due to the retractable dew shield, the telescope has a transport length of only 800 mm and thus space on every back seat.



The application areas of the TS 152 mm refractor:
Moon and planets: The image on the left was taken by Stefan Schimpf through the TS 152 mm refractor. Click on the image for maximum resolution. With suitable filters you can increase contrast and sharpness even more.
Observation of nebulae, star clusters and galaxies: The great strength of the refractor is wide field observation. Contrast and sharpness are comparable to those of an apo in this field of application.
Deep sky astrophotography: You can also do that with this refractor. We offer suitable field correctors. But we recommend filters that reduce chromatic aberrations, like narrowband filters or H-alpha filters.
Nature observations: Using a 45° Amici prism will give you a correctly oriented image with comfortable viewing when looking through the eyepiece. Suitable filters are also helpful here.




The 152 mm f/5.9 objective of the TS refractor

Many amateur astronomers are surprised when they observe through this refractor for the first time. The chromatic aberration, which appears as a blue fringe around bright stars or lunar craters, is hardly visible.

The glass materials used are K9 and F4. The objective is very precisely manufactured, so that even at high magnifications the image hardly shows chromatic aberrations.

Of course, both lenses have a broadband multi-coating on the surfaces. The objective is mounted in an adjustable and temperature compensated aluminum cell.

The 2.5" focuser

A fast refractor makes no sense without a reasonably sized focuser. A 2" focuser would necessarily cause vignetting, since the relatively narrow drawtube shades the optical path.

The TS 6" refractor´s focuser has a large free internal passage with an adjustment range of 100 mm. A 1:11 dual-speed gear is available for sensitive focusing.

Via the M68 female thread you can also attach screw adaptors for astrophotography. You will find suitable adapters in the accessories section. 2" accessories are perfectly clamped on the optical axis by an effective ring clamping "almost like screwed".

Technical Information:
Teleskop-Service has collected a lot of helpful information about refractors and provided it in English as a PDF file: refractors.pdf
Telescope type:Refractor
Aperture:152 mm - 6"
Focal length:900 mm
Focal ratio:f/5.9
Objective:2-element objective with K9 and F4 glass
Connection eyepiece side:M68x1 female thread, 2" and 1.25
Back focus:approx. 149 mm from the 2" receptacle and approx. 174 mm from the M68 thread
Tube diameter:155 mm
Dew shield diameter:186 mm
Connection thread objective to tube:M156x1 male thread on the objective cell
Adapter from tube to focuser:M109x1 female, M95x1 female
Tube dimensions (with handle):L=805 mm, W=190 mm, H=230 mm
Tube weight:8.5 kg
Optical tube
CNC rings with transport handle
GP style dovetail bar
Finder shoe on the focuser

Deep Sky Photography with the TS 152mm f5.9 Refractor:

Picture at left: CED 214 von Matteo Morino (Italy)

The TS 152mm f/5.9 refractor is good for deep-sky photography, if you use filters against the chromatic aberation, like H-Alpha, R-G-B or narrow band nebula filters like O-III, S-II.

The big 3" Crayford focuser holds also heavy cameras and allows the connection of the big TS Photoline 3" field corrector TSFLAT3. So you can use CCD cameras with big sensors up to full size without vignetting in the edges.

Image information:
Telescope: TS Refractor 152 mm f/5.9
Field corrector: TS Photoline Flattener
Guiding Control: TS Off Axis Guider
Filter: Baader Swanband Nebular Filters (O-III, S-II and H-Alpha)


Solar photography with the TS 152 mm f/5.9 Refractor:

Image at left: Sun by Stéphane Langlois (France)

Image information:
Telescope: TS Refractor 152 mm f/5.9
Solar filter: Herschel wedge
Additional filter: Baader Solar Continuum
Camera: ZWO ASI1600MM


Image at left: Sun in Calcium by Stéphane Langlois (France)


Image information:
Telescope: TS Refractor 152 mm f/5.9
Solar filter: Herschel wedge
Line filter: Calcium K line filter
Camera: ZWO ASI1600MM




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Reviews

Written by Jeffrey Gittleson
on 2020-04-30

If you want a deep view, with beautiful pinpoint stars, but a huge apo isn´t in the budget, this is the one to buy. Quality is a solid A, as well as the optical figure. Yes theres color, but it´s less than expected, and the field is quite flat for a 152 f5.9. Used for its designed purpose, it´s a real great buy!

Written by ALEKSEY VISOTSKIY
on 2017-04-21

"Very good telescope! Best optics, exellent quality!"