[Nick Zaire]

Thank you both for your replies.

The ‘judder’ seems to be an apt description and explanation of the issue. Understanding the limitations of the hardware, and subsequently ensuring VERY slow and smooth panning/tilting will help avoid the judder for the most part.

I’ve spent a lot of time since posting this question watching a host of different videos filmed on DSLR’s and the ‘judder’ is a lot more common that I had realised. In many cases though, unless you really look for it, your attention is so focussed on the subject/content of the video (as it should be!) that it doesn’t detract from the story/experience in any major way.

Again, thank you for your help.

[Nick Zaire]

Thanks for the prompt reply Ryan.

The footage was shot at 1/50 shutter speed- everything I’ve read stresses the 180 degree shutter rule so much that I’ve never tried shooting at anything other than 1/50th (25p).

I was actually going to try 1/60 (30p) to see if there was any differences, and even try a range of shutter speeds to see if there was any change to the image ‘FLICKER’.

I don’t have the exact settings for that footage, but the issue seems to occur for a range of aperture and ISO settings and focal lengths; shutter speed is always set at 1/50th.

The problem has got me somewhat concerned- I want to be more mobile with the camera (sliders, crane and glidecam) but I don’t seem to be able to get past the flicker (unless I am exceptionally slow with panning, in which case the footage is fine). I know the camera should be able to do it- watching videos of shoulder-rig mounted 5D’s, glidecam footage etc demonstrates that it is achievable.