03-02-2021 05:06 AM
03-02-2021 08:13 AM
DOF is driven by many factors: focal length, distance of the focal plane to your subject, aperture and the circle of confusion. Where the circle of confusion is related to the size of the sensor.
And as you've found, since video uses a cropped portion of the sensor, to get the same field of view to that of a still that uses the entire sensor, your distance to the subject would have changed and thus affect DOF.
03-02-2021 08:27 AM - edited 03-02-2021 10:13 AM
@rs-eos wrote:DOF is driven by many factors: focal length, distance of the focal plane to your subject, aperture and the circle of confusion. Where the circle of confusion is related to the size of the sensor.
And as you've found, since video uses a cropped portion of the sensor, to get the same field of view to that of a still that uses the entire sensor, your distance to the subject would have changed and thus affect DOF.
Are you talking about the cropping for 16x9 video vs 3x2 stills? I can't see that being much of a factor in Depth of Field.
03-02-2021 08:33 AM - edited 03-02-2021 08:34 AM
No, not the aspect ratio. The actual area of the sensor being used. DSLRs often will not use the full sensor area for video. And thus apply yet-another crop factor to the equation.
e.g. with the 5D IV, you get a 1.7 crop factor applied when capturing 4K video.
03-02-2021 08:46 AM - edited 03-02-2021 01:00 PM
The OP has said they are not using 4K video. There should be minimal crop factor with 1080p video.
For the OP to notice a difference in DOF between video and stills there must have been some other factor involved. Maybe they were shooting 4K and did not know it.
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