The advantage of a helical focuser is very fine focusing with high precision, combined with a low overall height.
♦ very precisely adjustable
♦ Limited autolock
♦ 45mm clear opening
♦ Minimum overall height 51mm, extension travel 40mm
♦ Can be used as a 2" variable extension tube thanks to the M48 thread on both sides
♦ Index and scale markings for reproducible focus
TS Helifoc: a short and precise focuser
A true helical focuser like this works like a camera lens. When you turn the focus ring, neither the camera nor the eyepiece rotates, the only movement is in and out.
The advantage of a helical focuser is a very fine focus with high precision thanks to the large knurled ring and a small pitch thread. This extract stays exactly where you want it. The high level of accuracy and short design make it a very good addition to telescopes where focusing is too imprecise.
The advantages of the TS "non-rotating helical" focuser:
♦ Camera or diagonal star does not rotate when stretch is adjusted
♦ Wide focus range: 51mm minimum height, 91mm maximum height
♦ Simple adaptation to telescope and camera
♦ Good solution for DIY telescope
♦ M48 threaded connections on both sides (internal/external), with all possible adapters
♦ Wide free aperture of 45mm on camera side and 47mm on telescope side
♦ Also suitable as variable extension sleeve M48 51-91 mm for perfect distance determination
♦ Two clamping screws to fix the focuser
Wide Focus Range and Short Overall Length:
The TS Helical Focuser has a generous 40mm focus range. The overall height, on the other hand, is very short. Therefore, you can also adapt the focuser to optics that are close to the point of focus, such as Newtonian ones. The drawer is also a good solution for self-construction.
Attention: the drawer is not designed for heavy accessories, it tilts.
The main accessories are small CCD cameras for planetary photography, 1.25" eyepieces and 2" lightweight eyepieces.
Optional gadgets:
Adaptations on the telescope side / objective side:
♦ TST2-M48L - T2 female thread adapter - for connection to T2 male thread
♦ TSVF230 - 2" Receptacle Adapter - for connection to 2" focusers
♦ TSSC-M48 - SC thread adapter - for connection to Schmidt-Cassegrain telescopes
Adaptations on the camera side / eyepiece side:
♦ TSM48-T2 - Adapter to T2 - short
♦ TS2-1 - 1.25" barrel adapter for star diagonals or 1.25" eyepieces
♦ TS2-1-T2 - Adapter to T2 and 1.25"
Type: | non rotating helical focuser with index marks and fixing screws |
Connection thread on the telescope side: | female M48x0.75 thread (2" filter thread) |
Connection thread on the camera side: | male M48x0.75 thread |
Minimum height: | 51 mm |
Maximum diameter: | 69 mm |
Focussing range: | 40 mm |
What´s included in the bos:
♦ Helical Focuser with 2 locking screws