GH1 GH1 Shutter speed question with open aperture

S

sebek

Active member
I thought that higher shutter speed, slows down the video? But, I shot 1.7 aperture with 4000 shutter speed on my GH1 with 35mm Fujian lens and the footage doesn't seem to be slower at all. I'm not complaining, since I thought i'd need an ND filter so that I can shoot full aperture.
Also, is 4000 the max shutter speed on the GH1?
 
what do you mean by slows down the video? shooting at high shutter speed gives that staccato look where movements are strobe like and not smooth because of the lack of motion blur compared to shooting at 50/60.
 
I may be mistaken here, but I think you may be confusing shutter speed with Frames per second.
If you research the forums here you can find great tips for capturing slow motion.
 
sebek said:
I thought that higher shutter speed, slows down the video? But, I shot 1.7 aperture with 4000 shutter speed on my GH1 with 35mm Fujian lens and the footage doesn't seem to be slower at all. I'm not complaining, since I thought i'd need an ND filter so that I can shoot full aperture.
Also, is 4000 the max shutter speed on the GH1?
Click to expand...

The shutter is synchronized to the frame 'boundary'. A shutter speed that has a longer duration than the frame 'time', will 'blur' across one or more frames. A shutter speed shorter than the frame rate will only capture a portion of the light that is available during the frame time.

For 'slow mo', you need high frame rate (and attendant higher shutter speeds) to capture many frames then replay them at a slower rate.

For pro productions the Phantom camera is popular, and can do 1000 fps or more depending on the model and options selected.

The 'best' most people on the low end of things can do is capture at 60p/50p and replay at 30/24 or 25. (Ok, my Sony handy HD cam says it can do 200 fps for a brief period of time, like 10 seconds... one of these days I'll get around to testing it...)
 
THanks. I'm not trying to do slow motion I just want to know why I would need an ND filter to shoot wide open aperture, if I can just raise the shutter speed to 4000 and shoot in the daylight outside just fine?
 
its purely aesthetics, if you want something that looks cinematic vs video. film a clip with people moving around at 1/50-1/60 and then film the same at 1/4000 and see if you can tell the difference in motion. there is nothing stopping you filming at 1/4000 if you are happy with the looks. its not my cup of tea though.
 
The first thing that i recongnised shooting in bright sunlight and applying the 180°ShutterSpeedRule is that there is far to much light entering the lense. Then i understood and bought a Vari ND ;)
But most of the time there is much too less light unfortunately.
 
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