In reply to The Lemming:
I’ve experimented just a few times using my phone and binoculars! Just a makeshift setup as a trial and did not involving buying any compatible connectors/adaptors.
I had similar quality of photos to your one (without the fun angle though 😉). I was aiming for the complete cut off circle, rather than it’s total absence, and achieved that, and was pleased at the fun results of photos of ruined structure, birds, etc., I obtained. I didn’t have a proper seal so the images were soft with I guess light leakage, inaccurate focusing between devices, etc.
It’s on my list of things to experiment further in due course, but I would need to research appropriate compatible devices/adapters at that time in future to get the best results. I note though there are now in-adaptor cameras being sold and that maybe worth exploring rather than using my phone or if I got a telescope probably using my digital camera.
I’ve seen some incredibly detailed, “normal” photo view (avoiding the cut offs), photos online which are effectively just the same as a camera with telephoto lens. Speaking to an RSPB staff member earlier in the year, she said many of her colleagues have had good results of shooting birds with their scopes and phones with appropriate adapter. She was planning on investing for herself as she always carries a scope and phone, but not a camera.