bobbydvideo wrote:
I have a question about "depth Of Field" on my CANON HF G60 video camcorder. I need a tutorial on this subject and can't find one anywhere. I just purchased the camcorder.
I also have a CANON R6 and have no problem with BOKEH on this camera.
What are you TRYING to do?
Depth of Field (DoF) is the amount of out of focus blur, as well as where it tapers off ahead of and behind the subject. It is effected by the distance, lens aperture and lens focal length. Shorter focal lengths and smaller lens apertures reduce background blur, making more of the image sharply defined. Longer focal lengths and larger apertures make for stronger background blur, shallower depth of field. Distances are a consideration, too... with both greater distance and very close distances making DoF become shallower, blurring to be stronger.
Bokeh is the
quality of the blur effect caused by DoF. Bokeh is somewhat subjective. Some people prefer a very smooth bokeh, while others appreciate the "swirl" effect certain lenses render. Highlights in out of focus areas can exhibit an "onion" effect... or look like a donut. Some people consider these poor for bokeh.
Notice that DoF isn't directly effected by sensor size. However, because lens focal lengths have to change depending upon the sensor format, DoF most certainly is indirectly effected by format.
A so-called full frame sensor like the R6 uses is 36mm x 24mm. In comparison, the so-called 1" sensor used in the G60 is very small... 13.2mm x 8.8mm.
The G60's zoom lens is approx. equivalent to 25 to 400mm on full frame. However, the
actual focal length range of the lens is 8.3 to 124.5mm. The maximum aperture of that lens is f/2.8 at the wide and and f/4.5 at telephoto end of the zoom. But a super short focal length like 8.3mm and a small aperture will make for huge DoF... basically everything will be sharp from your toes to the horizon! Depending upon the working distances, it may be possible to get some pretty good background blur effect at the telephoto end of the zoom range. But it will probably never be as strong a blur as you can get with your full frame camera.
Very roughly speaking.... compared to DoF and background blur with a lens on full frame:
- APS-C sensor will act like one stop smaller... an f/2.8 lens will render DoF similar to f/4 on full frame.
- Micro 4/3 sensor will act like two stops smaller... an f/2.8 lens will render DoF similar to f/5.6 on full frame.
- 1" sensor will act like three stops smaller... an f/2.8 lens will render DoF similar to f/8 on full frame.