Do you mean to use 85mm lens. How about to take the photo for whole class say 150 kids. I will use external Flash light with ISO 1600 . In this case, I want to know how to adjust. 光圈
Hiya Mr Hung, i shoot portrait (half body) for my child will use 85mm f/2.8 - f/4 at ISO 800 - 1600.
If you need to take for the whole class, you need to use wide lens, but dont too wide because the distortion will be significant at the edge of the photos, i.e. the children standing at the edge will be greatly distorted.
Aperture really depends on the lighting of the environment, if the light source is not too dim, then no flash is needed. If you need to use flash, i would use 35mm lens, set my camera at Aperture mode and set at ~f/5.6, iso set at 1600, and then the flash set at iTTL (if a/v), it will calculate the shutter speed & flash output for you. If the shutter speed is ok, let's say 1/30 or faster, then i will fire : )
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