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dji-sdk / Mobile-SDK-Android

DJI Mobile SDK for Android: http://developer.dji.com/mobile-sdk/
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Focus values #1257

Closed danilofariadutra closed 8 months ago

danilofariadutra commented 1 year ago

For the Zenmuse P1 camera, is there any logic to the focus values? By how many centimeters/meters do the values ​​vary?

dji-dev commented 1 year ago

Agent comment from yating.liao in Zendesk ticket #95001:

I guess you are referring to the distance the focus changes when the Focus Ring value changes during manual focusing. I apologize, but we do not have this parameter as it depends on the shooting environment.

°°°

danilofariadutra commented 8 months ago

According to DJI, there is no valid logic to automatically acquire the manual focus values ​​of the P1 Zenmuse camera. So, for this problem, we did a study with captures from 1 meter to 3 meters away, capturing numbers from a measuring tape. We varied every 10 cm, and captured 2 to 3 images, with different focus values ​​between them. Below are the values ​​with the results of the study carried out. I hope to help you

1.0m = 1740 (better) || 1707 1.1m = 1548 (better || 1436 1.2m = 1461 (better) || 1437 1.3m = 1366 (better) || 1337 1.4m = 1202 || 1256 (any value is ok) 1.5m = 1125 || 1187 (any value is ok) 1.6m = 1087 || 1143 (better) 1.7m = 983 || 1075 (better) || 1027 1.8m = 929 (bad value) || 939 || 957 (the other two, any value is ok) 1.9m = 966 || 1005 || 1058 (better) 2.0m = 1080 || 1093 || 1100 (any value is ok) 2.1m = 955 || 970 || 1008 (any value is ok) 2.2m = 946 (better) || 912 || 899 2.3m = 937 (better) || 928 || 912 2.4m = 926 (better) || 935 || 920 2.5m = 926 || 915 || 906 (any value is ok) 2.6m = 913 || 930 || 899 (any value is ok) 2.7m = 904 || 892 || 883 (any value is ok) 2.8m = 874 || 892 || 883 (any value is ok) 2.9m = 883 || 872 || 861 (any value is ok) 3.0m = 873 (bad) || 861 || 850 (the other two, any value is ok)