The PLUS tube rings from Prima Luce Lab are a perfect match to securely mount your ZWO cooled deep sky cameras when using a camera lens that doesn't have a traditional dovetail mounting system. Available with either 80mm rings or 90mm rings to suit small and large ASI cameras - see below.
Note: 140mm Vixen bar is not included.
For the 80mm ring only: a guide scope can easily be attached to the side of the 80mm ring with Prima Luce Lab's DX Finder Base. The 90mm ring does not have any side mounting holes for this.
Each component of the PLUS system is carved from aluminium blocks with CNC machines. Then, the aluminium is sandblasted to achieve a very smooth surface finish and it is anodized (hard anodizing) to increase the hardness of the material and to protect it from oxidation.
80mm Ring (small) is compatible with small-bodied cooled ZWO ASI cameras - ASI1600 Pro, ASI183 Pro, ASI533MC Pro, ASI294 Pro. 90mm Ring (large) is compatible with APS-C and full frame ZWO ASI cameras - ASI071 Pro, ASI2600 Pro, ASI2400 Pro, ASI6200 Pro. Be sure not to overtighten the ring's bolts or else the camera may be damaged.
ZWO Prima Luce Lab mounting system with Canon EF-mount lens and optional 90mm Vixen style bar.
ZWO Prima Luce Lab mounting system with Canon EF-mount lens and optional 90mm Vixen style bar side view
Note: Camera and lens not included.
Prima Luce lab make some nice stuff. This feels solid and well machined. Finish is top notch. Fairly easy to slip the camera into and tighten just enough so it doesn't move around. Not quite sure why they have one allen-key bolt the opposite way from the other - that seems a little odd but I guess there's a sound mechanical reason. Nice to have all the threaded accessory holes available too.