TS Optics 80mm angled viewfinder with vertical and mirrorless images
The TSFRE80T2 is more than just a finder, it's an impeccable widefield telescope. The good 2 element lens with a diameter of 80mm already shows many hundreds of deep sky objects. You can use conventional Plöss eyepieces, but also crosshair eyepieces. Viewfinder mount with stable, adjustable clamps fits commercially available viewfinder shoes such as those from Skywatcher, Vixen, Celestron, or TS-Optics.
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 TSFRE80T2:
♦ 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 TSFRE80T2:
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 be able to focus. However, you can use the T2 connection to focus all cameras. The T2 internal thread is located on the dovetail ring on the back silver knurled screw and loosen the radial clamping screws with a small flat screwdriver, then the back with the M28 thread can be removed.
|Lens focal length:
|Weight with bracket:
|Eyepiece side connection:
||1.25" with compression ring
||5 mm above the 1.25" receptacle of the prism
|Connection thread tube/prism:
|Outer diameter of the tube:
|Diameter of the dew shield:
|Intermediate thread for photo adaptations:
||T2 (M42x0.75) internal thread
|Distance to focus from T2 thread: