Modern digital cameras need far less light to form a usable image than the 35mm film that I used for more years than I’ve had digital equipment, and it’s now almost possible to take a sharp, low-noise image, without motion blur, of a fast moving squirrel using only daylight. I added an old telephoto lens and a DIY tilt/shift adapter to a small mirrorless camera, to allow most of the squirrel to be in focus even at a fairly wide aperture.