Purchased this scope to use as a guidescope when imaging with my camera with a lens rather than a telescope. Paired this scope with an ASI120mm-s CMOS camera and attached it to a universal L bracket. the camera and guidescope work well together using PHD II guiding software. Once the initial focus is set the scope needs no further adjustments. The scope/camera combo is light and portable adding very little weight to my main camera and lens set up. This makes the whole rig easy to balance and the tracking is very accurate.

Every time I order from OPT my order arrives in a timely manner and they keep me informed of the entire process. This little scope packs a powerful punch in guiding your mount and is a quality piece of equipment to add to your arsenal. Can't go wrong with this scope.

Cheap piece of equipment, with only one adjustable screw to lock it in the hot shoe of any camera is a laugh, too much play. The mount should be of Arca Swiss Fitting so it will fit in the newer style plates and not to have to piggy back an L plate and an additional quick release plate by Neewer Casey D

Admittedly, this is my first guide scope, but I’ve never had any difficulty focusing a cheap finder scope. This one drives me nuts. Hard to find focus in the first place—if you’re using an ASI290 mini you’ll need to screw on the extension tube—and then tightening the keeper ring knocks it out of focus again. Hard to get an HFM below 4. Yeah, it’s light but. . . . There’s no way to adjust the aim of it, either. Some people say it’s not important to align a guidescope with the main but I want it in the ballpark. I jammed a washer into the bracket to jimmy it into place. It fogs up like any other lens, so you’ll need a heater on it. With the 290 in place it’s doing an OK job with my 101mm refractor, though I don’t know how much better my guiding would be with a different scope; this is my first. Now that I have it I’ll keep it, but for my next scope I’ll look for something different.

I got this to fit in the shoe on the original model WO White Cat. It works very well and is a nice set up.

This shipment was fine but my next purchase I am still waiting for items that were on back order, it has been three weeks.