Review on Enhance Your Phone's Optics: Vankey Cellphone Telescope Adapter Mount for iPhone, Samsung, HTC, LG, and More! by Sam Simone

This is excellent quality. The eyepiece clip and holder are made of metal. The plastic here would warp when tightening the yoke, but this feels very stiff. It fits snugly on the Celestron 15x70 binoculars eyepiece for which I bought an adapter. The rubber pads are pleasant to the touch, but are not needed in this case because the eyepieces of these binoculars have rubber rims. The hole on the phone stand/clip mount is long enough to secure the phone I'm using (Galaxy S4) snugly under the power and volume buttons on the sides near the camera end. The phone stand/clip opens in one direction from the Eyepiece mount so with a centered camera phone you have to rotate the eyepiece mount to level the camera but there seems to be a wide range of adjustment for this with a slot in the eyepiece mount. The binoculars I use have a rubber cap that folds back for use with glasses or a camera. However, you must not pinch this part of the glass when tilting it back, you have to mount the adapter directly behind it, still on the rubber edge of the eyepiece, but now on a rubber layer. Luckily, this adapter keeps the camera far enough away from the eyepiece mount for you to do this and still fully seat the camera into the tripod/clamp. Once everything is set and tightened, the mount will hold the camera securely to the camera. .Of course, the eyepiece clamp is only suitable for eyepieces with a diameter up to the hole in the bracket. It fits snugly on my Celestron Skymaster 15x70 eyepiece. Also, the mount's eyepiece retainer needs to be secured behind the bent-back rubber cap, then the mount will fit into the hinge that connects the two halves of the binoculars together. To solve this problem, I mount the adapter on an individually adjustable diopter eyepiece with the eyepiece fully screwed in or "set". Then I focus the binoculars using the picture on my phone. This has nothing to do with the properties of the mount. When the camera touched the binoculars eyepiece, I was surprised at how little of the phone's field of view filled the field of view of the binoculars. usually. I need to do a 1.5-2.0x digital zoom in camera to basically fill the view. This is due to the size of the binoculars eyepiece and the size of the camera sensor. It also means that any image or video I capture this way will have a resolution reduced by the zoom factor. Of course I can just shoot at 1.0X and edit the black around the frame later.