SVBONY SV106 Guide Scope 60mm Multi-Use Finder Scope Guide Scope with Helical Focuser F4 for SG4 QHY5II ZWO SG4 CCD Astronomical Telescope

I did not buy this to use as a tracking scope but to use with my C90 to take photos of the Sun, Moon, and objects such as the Pleiades, & Orion's nebula. With a much shorter focal length than the C90 it gives less magnification and a wider field of view than my C90. It is well made, well packaged and I think it is a very good deal for the price. It can also be used with a 2x Barlow or a .5 focal reducer, and also as a finder scope.

Great product at a very good price. Works as good as the other dearer brands.

Good guide scope. It pairs well with my sv503 102ed and gives me good guiding in PHD2. I have it working with a QHY guide camera with a IR pass filter. My only real complaint is with the focus. I wish more guide scopes used the pinion style focus knobs so I could use an autofocus module with them.

used the guide scope for guiding on my sky-watcher ed

I looked at the listing carefully and decided this was the same scope made for other companies, but at a lower cost. Curiously it has the same model number as a 50mm finder, so I wasn't sure I was going to receive a 60, but I did. I mounted it to my Celestron 8SE to be used as an autoguider as shown in the photo It is actually a bit longer than I expected, but fits the 8SE well after I added a second vixen bar to give it plenty of support. I didn't use the narrow dovetail that came with the scope, however it is well made. so I may reuse that for another purpose. Instead I mounted the rings onto an extra pair of clamps I had. The optical quality is very nice. No visible aberrations or distortions from edge to edge, and the image is nice and bright with crisp contrast. I do see a purplish colored coating on the objective, so it may have an antireflection coating of some kind. I may need to tweak the focuser once I attach the camera, but for just using an eyepiece, everything works well and is smooth without being overly loose or overly tight. The only thing I didn't care for were the six inexpensive screws used to center the scope in the rings. They seem to be cast aluminum and not machined in any way. I may clean them up later with a die cutter. I also will add some lock nuts before my final alignment with the main scope, just to keep everything aligned and tight. So overall, I'm happy with the purchase and I think Svbony needs to be considered when choosing products of this type.