TS-Optics 50mm Angle Viewer and Guide Scope with 90° View - 1.25" and T2 Connection
Angle finder allows the use of standard 1.25" eyepieces and can be easily converted into a guide scope for astrophotography
♦ Achromatic multi-coated lens with 50mm aperture and 208mm focal length
♦ 90° angle view with vertical image and no mirror
♦ 1.25" connection with compression ring and helical focus: many eyepieces can be used
♦ Amici prism 360° pivot for optimal viewing
♦ The prism can be removed, then a T2 internal thread (M42x0.75) is available for future adaptations
♦ Long working distance of 90mm from the T2 internal thread
♦ Adjustable pipe clamps with thumb screws for exact alignment with main pipe
♦ Viewfinder mount suitable for viewfinder shoes from Vixen, GSO, Skywatcher, Celstron, etc.
TS Optics 50mm angled viewfinder with vertical and mirrorless images
The TSFRE50T2 is more than just a viewfinder. The good 2-element lens with a diameter of 50 mm already shows many hundreds of deep sky objects in combination with the TSIR20 illuminated reticle eyepiece.
It can be converted into a guide telescope for astrophotography in just a few simple steps.
When the prism is removed from the tube, you will find a female T2 thread. They have a very generous 90mm working distance from the internal thread to the focus. All common cameras and even correctors can be integrated. We especially recommend the following adaptation:
♦ TSHeli1 Helical focuser with male T2 connection thread on the telescope side, the focuser fits directly into the female T2 thread. The working distance from the T2 and 1.25" connection is 33mm to 43mm.
♦ You can shorten the working distance with the appropriate T2 extension sleeves. The extension simply stands between the viewfinder and the helical focuser.
The advantages and product features of the TSFRE50T2:
♦ High quality metal construction for the best possible stability
♦ Good 2-element multi-coated lens
♦ Focusing by turning the 1.25" helical focuser on the side of the eyepiece to observe
♦ T2 female thread for conversion to a compact guide sight
♦ Solid clamping with ring clamping
♦ Vertical, mirrorless image through 90° Amici prism
♦ The display position can be rotated in the desired direction
♦ Adjustable tube rings have plastic tipped metal screws to prevent scratching the telescope
♦ The scope fits into standard scope mounts such as those used by Skywatcher, Celestron, GSO...
Matching eyepieces and autoguiders for the TSFRE50T2:
The viewfinder focus is about 5mm above the 1.25" socket on the Amici prism. This is sufficient for many eyepieces, such as Plössl eyepieces. A very good eyepiece for centering is the TSIR20 illuminated reticle eyepiece, which can be find in the Recommended accessories are linked.
Even without the T2 connection, the scope is suitable for autoguiding. However, the autoguider must have a 1.25" housing, otherwise it will not focus. On the other hand, it can be focused with all cameras via the T2 connection.
Specifications:
| Aperture: | 50 mm |
| Focal length of lens: | 208 mm |
| Tube length up to T2 thread: | 175 mm |
| Weight with holder: | 690 grams |
| Eyepiece side connection: | 1.25" with compression ring |
| Focus position: | 5 mm above the 1.25" receptacle of the prism |
| Connection thread tube/prism: | M28x1 |
| Outer diameter of the tube: | 54 mm |
| Intermediate thread for photo adaptations: | T2 (M42x0.75) internal thread |
| Distance to focus from T2 thread: | 90 mm |
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