SVBONYSV214 Pro Universal Phone Adapter for Telescope, Spotting Scope Binoculars, 3-Axis Adjustable Phone Holder Adapter with Remote Control for 28-48mm Eyepiece All Cell Phone, for Capture Images

The media could not be loaded.  I have used several other 2 axis eyepiece adapters in the past, and while the SV214 pro costs about twice as much as many of it's competitors, I believe that the ease of use makes it worth the extra cost. Specifically, you can adjust each axis independently, and there is no annoying "lock/unlock" procedure when adjusting each axis. You just turn a knob and the stage slides in one of the three cardinal directions. When you stop turning the knob it stops moving and is automatically "locked" into position.The cell phone clamp does a good job of repeatedly grabbing your cell phone into the same position due to the fact that it has two immobile clamps and a single moving side clamp. So if you take your phone out, and then put it back in, it is likely you will only need to make minor modifications to the alignment.Downsides of this adapter is that it may weight a bit more than smaller ones, and it is bulky (and does not snap apart or rotate into a smaller "stowed" position.) but the ease of use is worth it in my opinion.Now....it doesn't really make eyepiece projection into a cell phone camera give you better images. The images you take with a cell phone are still not going to compare to a dedicated astro-photography camera, or a DSLR with a good T-ring adapter in image quality....but the easy of alignment will make your cell phone images as good as they can be, quickly and easily. [And it's a lot cheaper than a DSLR or astro-photography camera.]The package includes a generic bluetooth shutter control button. Nothing special, but it works as expected. Using a wireless shutter is important so that you don't jiggle your telescope when taking photos.

The biggest reason for trying this is repeatability of phone position. This adapter has a molded, padded stop at the bottom of the phone holding area. This is a great advantage, but also a weakness.The stop is an advantage because the phone goes back into the SAME holding spot every time, with very little fiddling. The stop is a weakness because chances are good that there WILL be a phone button on the side at that location. A case that leaves the buttons slightly recessed has a good chance of still fitting the holder. Still, it would have been nice to have some sort of adjustment to avoid the button collision.The stop is the big advantage this adapter has over the "Move Shoot Move" Tridapter. Lacking the stop, the Tridapter requires readjusting the "Y" axis every time the phone is attached.It also appears that the SVBONY adapter is a touch more substantial than the (already very substantial) Tridapter. For example, the clamping "window" sides are about .5mm thicker on the SVBONY than the Tridapter. The knobs are a bit easier to handle with gloves on.The SVBONY spring clamps the phone. The Tridapter screw-clamps the phone. It is easy to confuse the Tridapter phone screw for the x-axis adjustment screw.The Tridapter has a 20mm deep clamping band. This provides a steadier hold than the SVBONY 16mm clamping band. That being said, The SVBONY is still VERY steady with minimal clamping pressure.The single biggest drawback of the SVBONY is that the Z-axis adjustment can NOT bring the phone flush with the face of the clamp area. In fact, the back of the phone cannot get closer than 15mm from the "face" of the clamping area. This is a problem for scopes like the SVBONY SA401 20-60x85 scope. If you clamp on the eyecup so you can still operate the zoom, you WILL have space between the lens and the eyepiece, that that will let stray light degrade your image. If you clamp on the zoom so you do NOT have stray light you will not be able to operate the zoom without loosening the clamp, then likely needing to reset the Z-axis.Overall this is a solid, well-made adapter. Adjusting screws are larger diamter than the Tridapter, and have a lightly better feel. The phone locating foot is an outstanding feature. If the Z-axis adjustment could clamp to the eye cup AND minimize stray light it would be a 5 star. But since it does not work well with the scope mentioned, I can only give it 3 stars.If you will be using this on FIXED eyepieces (like using an adapter to put a wide angle 40X on the SA401, or most astronomy eyepieces) I'd rate this a full 5 stars.