PANDA 35 x 50 HD - hook up to your phone
You must have come across "binoculars" that you can snap onto your phone, and you can see far away with it. Well, the one called Panda bear binoculars, going far beyond these capabilities.
This Panda is no longer a toy binocular. 35x magnification and a 42mm lens are quite something. The compact size is ensured by a prism system, but it is doubtful that with such a large lens, enough light reaches the phone's camera to take worthwhile pictures. Because of the size, I would probably hold the phone and this tube applied with both hands. Its weight is also not small, at least compared to similar "binoculars", it weighs 280 grams.
Amateur ornithologists in advance, try this stuff for 3076 forints! Here you can order: PANDA 35 x 50 HD Hiking Concert Camera Lens Zoom Monocular + Clip for Smartphone Black