If you are using a wide-angle lens you need to keep the camera upright (a spirit level will help – recent EOS cameras like the EOS 6D Mark II have one built-in, plus you can buy levels that fit into the camera’s hotshoe for other models). You have several options for minimising converging verticals if you don’t own a tilt-and-shift lens. What if I don't own a tilt-and-shift lens? This ability to move the image-forming area of the lens means that you can utilise a particular area of the lens in order to avoid the edges of the lens, where distortions typically occur. These much larger image circles mean that the lens can be shifted to the left or right, or up and down, without the sensor falling outside the image circle. The later two lenses released in 2009 have an even larger image circle of 67.2mm – around 55% bigger. (The image circles of EF-S lenses, made for APS-C size cameras, are smaller at 27.3mm diameter.) The image circles are large enough to cover the sensor (full frame is 36 x 24mm), and little more.Ĭanon’s first generation tilt-and-shift lenses had image circles of 58.6mm diameter – this is around 35% bigger. The image circle of an EF lens is 43.2mm in diameter. Tilt-and-shift lenses enable EOS users take advantage of these movements, by introducing lenses with image circles much larger than conventional lenses. The bellows allowed the lens and camera body to be moved independently, enabling focusing techniques that were impossible with 35mm cameras. Before tilt-and-shift lenses were made for 35mm film cameras, many professionals used large format cameras, which have a flexible bellows between the lens and camera body.
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