video & shutter speed woes

Hello everyone

I did some research & found that the optimal shutter speed 1/50.

Great.
Shot a video with my 5d mkii & 17-40L at f/4 40mm & 1/50.

Turned out good. Smooth enough.

See here:
http://youtu.be/vh8Vlg​DtMAQ

As you can see, it right around sunset but exposure turned out.

Today I did another shoot at noon with my 35L.

At iso 100 (apparently Video mode doesn't allow you use the iso 50 option), f/1.6 the camera struggling because it was too bright .
The 1/8000 kept flashing, the camera wanted to stop down to balance exposure.
Finally I stopped down to f/6.3 and that reduced shutter speed to around 1/6400.


Needless to say it was jittery. Movement was shaky.

See here: (2gb file)

https://www.dropbox.co​m …lrqiw2ydpul5/MV​I_5847.MOV

Plus, I didn't get to use the aperture i wanted (f/1.6).

So how does one get that cinematic effect bright daylight?

I'm stumped.

Thanks.

Use a neutral density filter

What do you reckon would bring a required 1/8000 down to 1/50 or 1/60?

1.2 nd?

I Picked up a marumi vari nd rates as 2-400.

One stop would be 1/4000, 2 stops 1/2000 etc so 7 stops or thereabouts

Thank you

So how many stops would the filter I get reduce for me?

Depends on what filter you get. Just google ND filters to understand how they work and what you need.

I understand how they work.

Also ,I mention above which I got:

marumi vari nd rates as 2-400.

The 2-400 description is throwing me off.

I know they're sold by stops.

What's 2-400?

How many stops.

http://www.amazon.com …ter-Digital/dp/B0065SPKEM

Quick google search looking at Amazon shows the number of F stops in the description

Yet you made it a point not to mention it here....

It's not about anything....but letting others benefit. That Amazon link oud here today, could be gone tomorrow.


It's 9 stops.

Not bad IMO.

Looking forward to using it in a few days.

I have no evidence to back this up, but theoretically, I know the Canon codecs do reduce the image quality due to downsampling (vs. RAW), therefore I don't think you'd see much image degradation if you used a variable ND filter for video only. You may see less sharpness/contrast if used for photo. I think a variable ND filter is the best and most logical answer for video unless image quality is of utmost importance as it allows for quick adjustments vs. changing filters. Be forewarned if the lens rotates during focusing, this will pose a problem though, if you need to change focus during a shot.

Thanks evv

A good first step is a circular polariser..... that can knock the light down a little and cut through some of the 'fug' of light.... usually then we think about an ND