For small like the monocular camera module (1.12 um like yuan, four points, 1 inch lens focal length is 3.1 mm, f), according to the calculation results: super was achieved at 2.55 m distance focal length, depth of field range of 1.28 ~ up, but in actual use, such as take), under the condition of distance 30-50 cm shoot photos besides the subject clear, background objects (object distance more than 5 m) are more clear, look at the depth of field after not supposed to so far, this is how to do?
Personal understanding: the focus module object distance to nearby, although the background object falls outside the scope of the depth of field, but it is still relatively clear state, due to the smaller the phone's screen when review images, without enlarge photos, give a person the senses are clear,
Please guide, thank you very much!

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