ID 42703925 © Kornilov15 | Megapixl.com
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35mm 50mm acceptable and aperture aps background balloon blur camera chart circle coc confusion deep depth different digital distance dof dslr eps8 equivalent far field focal focus for foreground format four frame full graph hyperfocal images infinity landscape length lens limit meter motif near number optics person photography professional reflex sensor shallow sharp sharper sharpness shutter sign size sizes stop symbol thirds useful value vector