liningiv
lvl.4
Flight distance : 329409 ft
United Kingdom
Offline
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My own tests show that the AEB 5 shot capture varies the shutter speed by 0,6 of a stop between each exposure. 1/10, 1/15, 1/25, 1/40, 1/60 so about 2,5 stops between 5 photos.
On the ground with a very sturdy tripod, I normally use 2 stops between each exposure, so a 5 shot sequence based on 1/25 second "correct" exposure, would go something like 1/2, 1/6, 1/25, 1/100, 1/400 so about 8 stops between the lightest and darkest. This is the sort of difference in exposure that is needed for HDR.
That is why most HDR shots from Phantoms still have blown out skies/sun or lack detail in shadows.
Hence I suggest taking single RAW shots, correctly exposed, and lifting the shadows and attenuating the high lights in software.
As for capturing aerial HDR, I have found it virtually impossible, because the movement of the Phantom between shots, either up/down, left/right, fwd/back, roll and yaw means that every shot is taken from a different place in 3D, resulting in artefacts where a sharp edge moves between each shot.
The first shot below show a 5 shot sequence merged in Lightroom. Which shows the amount of movement between shots and also a burnt out sky.
The second shot is a single RAW shot taken from the 5 shot sequence, it does not show any artifacts from Phantom movement, and also shows much better sky exposure (by using highlight slider) and very good shadow detail (revealed by using shadows slider).
The bottom picture is my final edit from the single RAW shot.
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5 Shot HDR merge to HDR in Lightroom.
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Single RAW shot from sequence, edited in Lightroom.
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