62 utenti della rete avevano questa curiosità: Spiegami: Why can phone cameras not take good photos of the moon? They always seem to make it 10x smaller than you can see with the naked eye.
Spiegami: Why can phone cameras not take good photos of the moon? They always seem to make it 10x smaller than you can see with the naked eye.
Ed ecco le risposte:
The human eye is close to a 35mm lens or focal length. The standard phone is 12-15mm until zoomed in.
Some light reading on focal length
The naked eye is very powerful. Especially in low light conditions our eyes are very good at adjusting to it so we can see better. Also when you have the whole sky around the moon it’s hard to realize the actual size and most people overestimate how big it looks.
The moon is always approximately the same size to us, but it is a small part of the total night sky. Your mind tends to mute out the uninteresting blank sky and focus more on the moon so it seems more predominant than it actually is. When you take a photo of the moon with your camera, it gets the rest of the night sky in the shot. When you look at your phone’s picture, you see the moon, the night sky, the phone, and everything else around your phone to really put the moon to sky ratio to scale. When you’re just looking at the moon, there is no other reference point to appreciate how little of the night sky it takes up.
The zoom functionality of a camera to achieve 10x zoom is based on a ‘digital’ zoom. The software resizes the image taken by the sensor on the camera to provide a close up look.
Cameras are limited by the sensor pixel count and the lens on the camera (which is typically in the 26-35mm focal length). Where you need a lens with a 400-1000mm focal length to achieve 10x zoom of the moon. Fitting such a large lens will be difficult on a phone camera.
Because the moon is much smaller than it looks to us. Our visual system isn’t a simple camera – there’s lots of image processing done by our subconscious brain, and the result of this is that some things look bigger than they are, and other things can look smaller.
Part of this is the Moon illusion – the rising moon looks very big, while the moon high overhead looks much smaller – but in actual fact, the moon overhead is very slightly larger, when measured as an angle, than the moon when it rises. Our brains just handle it differently, and we don’t see it as it really is.