ToopMountUniversal Smartphone Adapter Cell Phone Adapter Mount, Compatible Binocular Monocular Spotting Scope Telescope Microscope, Astronomical Telescope, for Record Nature World Black

Used on a 3", 4" and 5" dobsonian telescopes with 1.25 eyepieces. Modern cellphones have greatly improved their cameras and for casual users, it works great.The good:*It will hold a large phone with the case on.*Seems to hold onto the eyepiece tightly, even for heavier phones at odd angles.*Does not interfere with focuser.*No need to buy an SLR camera or drag out a laptop with a USB camera.*Easy to attach to other telescopes.*Seems to have enough hinged parts to accommodate any size/shape phone.*Works with barlows and numerous sized eyepieces.*Allows multiple people to see an image. No more eye relief worries.The less good:*Wiggling Wiggle mount. Touching your phone to take a pic, or touching your telescope, will make the image break dance. The more you zoom, the worse it will be.*Switching eyepieces is a pain. You basically have to start over with repositioning your phone.*Modern phones have multiple lenses. Changing your camera settings, zooming, going wide angle, etc, etc could cause a different lens to activate. And you're back to repositioning your phone.*You'll need to understand and tweak your phone's Pro camera settings to use this mount. Manual focus is a must too. Don't bother with Auto settings.*Would be nice if you could easily adjust how far the phone is from the eyepiece. They all have a different sweetspot.*Given how inherently wiggly this mount is, no idea if you could use it on a clock drive. Literally a light breeze will make your image flutter.

I originally wanted it because it looked simple. In the box, no instructions. What a hassle!! You have to remove your phone case and that in itself is a hassle. Then you have to get your phone exactly in place over the hole on the lens by twisting and clamping the phone at an angle. 30 minutes later I thought I had it and when I attached it to my telescope, it fell off and I had to start over.I returned it and got one that clamps right over the lens.

This worked perfectly for adding my phone to my telescope.

Works good if you can get it perfect. Would not buy again.-=Mathew