Opinions on shutter speed for a light slowmo effect at DVinfo.net

Hayden Hoyl · July 2nd, 2011, 04:46 PM

Hey everyone, I will be shooting a promotional video for a friend's clothing line later next week and I will be using my girlfriend's 7D. I normally shoot with a Nikon d5000 but it only shoots 24p in 720p and I would like to add some slow motion in the video. Because I have the opportunity to use the 7D for the project, I want to take advantage of 1080p so I will be shooting in 30p and I was wondering if I could get a smooth slow motion effect without having to bump up to 60p and lose quality? I only want to slow down the footage to about 90% of the speed of a 24p frame rate. I will be shooting during golden hour outside in a forest type environment and so I'm wondering what shutter speed I will need to shoot at so that I can slow the footage in the time line later while also having decently exposed shots. I plan to have a few flares here and there. Any ideas?

John Wiley · July 2nd, 2011, 11:37 PM

If you shoot at 30P and slow it down to 24P by reconforming the footage in post, you will get slow motion at 80% of real-time.

If you want do it it this way make sure you have a solid idea of what shots you want to be in slow motion and which ones you want to be in real time, becuase you'll need to shoot the real-time shots at 24P. Failing to do this will mean you be getting blended frames on some of the clips when you mix them on the timeline.

As for shutterspeed, shoot the whole thing at 1/60th and it will be fine.

Hayden Hoyl · July 3rd, 2011, 09:54 AM

-John
Thank you very much for the helpful input!

July 2nd, 2011, 04:46 PM	#1
Hayden Hoyl New Boot Join Date: Apr 2011 Location: Brooklyn, New York Posts: 16	Opinions on shutter speed for a light slowmo effect Hey everyone, I will be shooting a promotional video for a friend's clothing line later next week and I will be using my girlfriend's 7D. I normally shoot with a Nikon d5000 but it only shoots 24p in 720p and I would like to add some slow motion in the video. Because I have the opportunity to use the 7D for the project, I want to take advantage of 1080p so I will be shooting in 30p and I was wondering if I could get a smooth slow motion effect without having to bump up to 60p and lose quality? I only want to slow down the footage to about 90% of the speed of a 24p frame rate. I will be shooting during golden hour outside in a forest type environment and so I'm wondering what shutter speed I will need to shoot at so that I can slow the footage in the time line later while also having decently exposed shots. I plan to have a few flares here and there. Any ideas?

July 2nd, 2011, 11:37 PM	#2
John Wiley Trustee Join Date: Oct 2008 Location: Byron Bay, Australia Posts: 1,155	Re: Opinions on shutter speed for a light slowmo effect If you shoot at 30P and slow it down to 24P by reconforming the footage in post, you will get slow motion at 80% of real-time. If you want do it it this way make sure you have a solid idea of what shots you want to be in slow motion and which ones you want to be in real time, becuase you'll need to shoot the real-time shots at 24P. Failing to do this will mean you be getting blended frames on some of the clips when you mix them on the timeline. As for shutterspeed, shoot the whole thing at 1/60th and it will be fine.

July 3rd, 2011, 09:54 AM	#3
Hayden Hoyl New Boot Join Date: Apr 2011 Location: Brooklyn, New York Posts: 16	Re: Opinions on shutter speed for a light slowmo effect -John Thank you very much for the helpful input!