SESTO SENSO

How to choose the best focusing systems for telescopes? Our SESTO SENSO robotic focusing motor and ESATTO robotic microfocuser offer the same basic features but different designs in order to offer you the best focusing solution, both for astrophotography and visual use. In this article we analyze the main differences between the 2 devices and we suggest what model is the best based on the telescope you have and the application you want to use. This way you will learn why our SESTO SENSO robotic focusing motor and ESATTO robotic microfocuser are the best focusing systems for telescopes and how you can use them in order to improve your telescope.

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SESTO SENSO 2 is designed to be connected to focusers that comes with 25mm diameter shaft (that you can see by removing fine and coarse knobs of your focuser) because most of the focusers come with 25mm diameter shaft. If your focuser have another diameter, you can add the 26mm (SESTOSENSO-AD26II), 33mm (SESTOSENSO-AD33II) or 37mm  (SESTOSENSO-AD37II) adapters. Any other diameter won’t work. Please note that these adapters are compatible only with SESTO SENSO 2 and not with SESTO SENSO first generation. In order to install the adapter, first of all please connect the long bushing (the one that comes within the adapter box) to your focuser’s shaft and lock it by using the 2 grub screws. Please note, it’s normal that the other side of the bushing has no threaded holes.

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One of the advantages of the SESTO SENSO design is that you can manually move your focuser by using the coarse knob on the other side of SESTO SENSO. You can manually move your focuser when SESTO SENSO is powered off. You can do this also when the SESTO SENSO is powered, just remember to turn off the "Hold motor" option under "Advanced Settings". By doing this you will be able to move your focuser but please note that you will have to make SESTO SENSO calibration again. A quick way in order to reset SESTO SENSO calibration if you manually moved your focuser is this:

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SESTO SENSO is designed to be connected to the shaft that you can see in your focuser by removing the coarse and fine knobs. Most of the focusers in the market have a shaft with 25mm diameter and SESTO SENSO will connect to this shaft out of the box, without the need for adapters. Other focusers may come with 26, 33 or 37mm diameter shafts: in this case you will have to add also the optional 26, 33 or 37mm adapter for SESTO SENSO. Any other diameter won’t work. SESTO SENSO is designed to be connected to your focuser without the need of external and uncomfortable brackets.

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SESTO SENSO focusing motor is designed to be connected to telescope's focusers that come with fine focus knob. In order to connect SESTO SENSO to the focuser of your telescope, remove the manual focus micrometric knob by unscrewing the screw normally present on the knurled knob. After pulling it out, you also need to disconnect the coarse focuser knob, by means of an allen screw on the knob. On some plastic-covered focusers, you need to remove the plastic to access the disassembly screw. Connect one of the bushings you find in the SESTO SENSO box (based on the diameter that fits your focuser) to the small focuser shaft of your focuser.

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