gx7 & ibis

Bobby Rue Goldberg wrote:

Anders W wrote:

Bobby Rue Goldberg wrote:

Anders W wrote:

Bobby Rue Goldberg wrote:

Anders W wrote:

Bobby Rue Goldberg wrote:

Anders W wrote:

Watch them again with a more critical eye. When I first watched The Bourne Ultimatum, I just did it to have a good time, not to tear it apart.

But, when I read about the shaky cam then watched the movie again, I noticed things that never occurred to me the first time. The first thing is how immensely shaky the whole movie is, from start to finish. There's absolutely no tripod or steadyshot rig in the whole movie. It's all handheld with the camera man on the move.

Tripod maybe no. Rig yes.

The second thing I noticed is the extreme number of rapid cuts that take place in this movie. I've since read that there's a cut in this movie every 2 seconds on average. And, wouldn't you know it, that's all I see now when I watch the movie. But I didn't notice it at all on my first 5 viewings of the movie.

Correct but something else.

Software shake reduction, by necessity, trades resolution for steadiness. You're cropping by a certain amount into the video, then using the remaining pixels around the crop to steady the cropped portion.

The program analyzes the video for the amount of shake by recognizing patterns within the video and noting where and how that pattern moves. The ultimate goal is to keep any recognizable pattern in the same spot from frame to frame.

So, when you have 4K video, when you crop into it slightly in order to do shake reduction, you're still going to have more than sufficient pixels remaining to form a perfect quality 1080p image.

There's a loss no matter what pixel count you start out with. Of course, if you have more pixels to begin with, the loss may be less important in absolute terms.

The basic premise of electronic and software shake reduction is to trade some resolution for steadiness. But software shake reduction can be done more accurately and more effectively in PP than it can at the time of capture. But doing it at the time of capture is more convenient.

And, of course, if the final capture is 1080p quality, not 4K, then you have to lose out on some of your original resolution. But, I've argued in the past that doing software shake reduction on Panasonic's 1080p still yields better results than Oly's 1080p.

And, as mentioned, Panasonic has numerous stabilized lenses that work well. You can also use 3rd party stabilized lenses, such as from Canon.

Are you saying that there are adapters whereby you can have Canon lens IS work with Panasonic MFT cameras?

Yes, I believe Canon IS does work on Panasonic MFT, but not the AF (if I remember correctly).

Do you have a source to confirm that?

I'm not sure what to tell you. His opinion is a complete outlier here. He's prone to doing stuff like this. I spend a lot of time on video forums, and I can assure you, his opinion is not shared.

As far as I can tell, he is quite respected and contributes to DPR's reviews on the video side (e.g., for the video section of the GH3 review).

And, speaking for myself when looking at OM-D video, I don't see it.

Not surprised to hear you say that.

In his article, I believe he does make some mention of having to do some PP on the Oly video (e.g. adding grain) to make it more presentable, but I believe this type of stuff is only applicable to a certain type of video shooting that's less demanding.

No. He just talks about how to best add film grain if that's what you like to do. He also says that "at ISO 3200 the OM-D E-M1 is perfectly usable and the grain texture is quite nice."

Heat problems present as a reduction in video quality. And the OM-D cameras don't exactly shine here. So, you saying that there are no heat problems seems a bit hollow to me.

Heat problems imply a loss of quality after a while as the sensor warms up. I have never heard any such report about the E-M1.

I believe a consensus opinion from experts should not be discounted. Of course, you should study and form your own opinion, but also take into account the opinions of those who have more experience on a particular topic.

Experts? Which experts?

Still waiting for a response to my questions here, which are closer to the topic of this thread than this video-related stuff.