Primaluce Lab OnAxisLock 50.8mm Eyepiece Holder for 2.7" Hybrid-drive Focuser
Primaluce Lab OnAxisLock 50,8mm eyepiece holder for 2,7" Hybrid-Drive focusers replaces the traditional eyepiece holder in AIRY ED100 and APO120 apochromatic refractors focuser and lets you use all the 50.8mm diameter accessories.
We've also sold it to customers who had Skywatcher Esprit-120ED and Esprit-150ED telescopes with a 3" focuser.
During use of heavy photographic instruments like DSLR or cooled CCD cameras (often equipped with filter wheels ), it's crucial to avoid flexures when we insert them into the telescope's focuser. This is also important for visual use using large mirror diagonals and wide field eyepieces (which are often very heavy).
That's why we designed the OnAxisLock eyepiece holder that replaces the classic screw with a new locking ring system. This allows you to perfectly lock the inserted accessory just by rotating the outer ring (red): a special double ring tightens internal accessories with an uniform pressure. The OnAxisLock eyepiece holder also allows you to keep perfectly aligned the accessories inserted in the focuser: so you will be sure that your camera's sensor will be perfectly centered with the optical axis of the telescope.
In order to connect this model to Hybrid-Drive 2,7" focusers of AIRY ED100 and APO120 telescopes, simply unscrew the original 50,8mm eyepiece holder, then screw on the OnAxisLock.
Left: 50,8m original eyepiece holder in the AIRY APO80 Hybrid-Drive focuser
Center: in order to install OnAxisLock, you need to unscrew the original eyepiece holder
Right: OnAxisLock 50,8mm eyepiece holder threaded to the 50,8mm Hybrid-Drive focuser
OnAxisLock 50,8mm eyepiece holder for 2,7" Hybrid-Drive focusers replaces the traditional eyepiece holder in AIRY ED100 and APO120 apochromatic refractors focuser and lets you use all the 50.8mm diameter accessories.
The particular locking mechanism also prevents to scratch inserted accessory because the pressure is distributed uniformly in the barrel. With the classic screw closure the mechanical stress is instead brought on a small area and this can easily scratch the barrel.
The special design of the outer ring has been developed to allow you to lock the accessory with ease, even when wearing gloves. This way you can be sure to safely lock your CCD camera or your eyepiece even in case of bad weather conditions.