Using bulb to take the picture in a very dark room. F-stop: f/20, focal length 18mm again, max aperture 3.6, no flash, light source is tungsten. the materials i used white flash light, sugar paper (black in colour), tripod.
Using bulb to take the picture. f/20, ISO 320, exposure bias 0step, focal length 38mm, max eperture 4.3, no flash, light source tungsten, exposure program is manual.
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