TEST – Compare EX1 to HVR-Z7 regarding Long Gop

[Don Greening]

[Chris Babbitt] “So, if I’m shooting at 30p with the shutter speed turned off, the camera sets the shutter speed to 1/30, but it should be 1/60.”

Hi Chris.

However it works, don’t leave anything to chance. I always check to make sure the shutter speed is what I want before I ever press the record button. For a test, try a pan at 1/60th and then another one at 1/30th. You’ll see a big difference in motion stutter and blur. Yes, you’ll need more light at 1/60th than at 1/30th shutter speed. You’ll also be able to see that difference each time you switch back and forth between the 2 settings. I don’t know if 1/60th takes twice as much light as 1/30th does but you’ve got the right idea.

Keep in mind that even with a shutter speed of 1/60th shutter and shooting 30p with the EX it still has a brighter picture than a PD170 shooting 1/60th shutter shooting 60i. which is really quite amazing when you think about it, because it takes more light to shoot progressive than it does to shoot interlaced.

– Don

[Chris Babbitt]

Thanks for clearing that up. Don.

[Rafael Amador]

Progressive must have the half of the Shutter speed of Interlaced. Thats why normally Progressive shows more motion blur than interlaced. Same happens with film.
How it works in EX-1? Enigma.
The thing that always make me wander is: Why the default manual Shutter speed is 1/100?
In 1080i50, I have no 1/50 option. Neither in 720p50.
Must be the Shutter OFF default speed. Wrong?

Mac OX 10.5.2-FC 6.02-QT 7.4.1
G5 2x2Gh 4GbRAM-BlackMagic Extreme
PMBP 17″Core2Duo 4GbRAM-AJA ioHD
JVC DTV-17″
SONY EX-1 . SONY PD170
..and always a big mess on top of the table.

[Richard Ladkani]

Hi there

My final conclusion:

I did some more tests today and I can now confirm what some of you have said all along. The shutter is 1/25th when OFF in 25p mode. It causes intense motion blur, makes the image soft on movements and looks bad when used for handheld camera. The 1/25th shutter also gives the camera an extra stop of light. When turned to 1/50 the camera is just about as good in low-light as the new HVX201AE. Maybe a bit better.

The best solution for 25p was turning the shutter to 1/50 and to keep Steady Shot ON during handheld shots and to turn it OFF for pans during tripod moves. If it’s left ON it can cause some strange aftermove once you have come to a full stop. When OFF in handheld moves it makes the image very shaky and makes you kind of nervous.

There are NO LonGop issues with this camera. It performs just as well as the HVR-Z7 on movement.

Sorry about all the back and forth on this but I think some of us have learned a lot about this camera during all these discussions.

Best wishes and see you soon on the next topic.
Richard

https://www.richardladkani.com

[Don Greening]

[richard ladkani] ” If it’s left ON it can cause some strange aftermove once you have come to a full stop.”

This is because the OIS on just about all cameras will try to correct the end of a pan or tilt because of the movement. This is normal. When shooting with a tripod deactivate the camera’s OIS function. Shooting with OIS turned off will also save battery power.

– Don

[Chris Babbitt]

So, I guess we can assume that Alister was right when he said that the default is also 1/30 at 30p and 1/60 at 60i. So, if I’m shooting at 30p, I should probably change the shutter to 1/60, but at 60i, I could leave it at 1/60 and get acceptable results.

[Paul Zwicker]

You guys have no idea how hard it is to read this thread and choose a camera (under $10,000) to purchace.

I am testing the EX1 this week. I want to be sure I can capture clean moving video. I have a client who is nervous that this may not be the correct camera to shoot children on playsets swinging away.
Last time we shot on a F900 and slo-mo was great when captured @30fps.
Now a post house the client may use has expressed concern.

So. Perhaps I should go back to my original camera choice (JVC 200) and shoot in 720 on HDV and harddrive backup. Or it may be that shooting the EX1 in 720p @60fps will look just dandy.

Argggggh.

BTW. Thank you all for you insights here. It is remarkable how information is shared.

Paul

[John Sharaf]

Paul,

I believe you are correct in being suspicious of long GOP recording formats vis a vis strong movement. Perhaps you should consider a 720 60p solution like Varicam or any of the P2 Panasonic cameras for this project (swingset), which will offer you the best slomo capabilities short of a dedicated slomo camera.

JS

[Michael Palmer]

Paul
you won’t have any issues with any of the the formats, however if you give the post house 720 60p you won’t have nothing to worry about.

Good Luck
Michael Palmer

[Michael Palmer]

Paul
you won’t have any issues with any of the the formats using the EX1, however if you give the post house 720 60p you won’t have nothing to worry about.

Good Luck
Michael Palmer