CMOS ROLLING SHUTTER

[LouBruno]

During my lecture at the MGT, I touched-on the issue of CMOS rolling shutter. Below is a link which can clarify the issues of rolling shutter:


http://dvxuser.com/jason/CMOS-CCD/

[erictom]

..That's why I'm hanging on to my CCD-equipped Z1 (global shutter) and have not really invested in the higher end SONY's for that reason. (I may have to compromise soon, when it seems like HDrives are more technically desirable than HDV tapes.) It (rolling shutter) is a pain especially for wedding work where you are confronted with rapid photographer flashes. It is a relief that the clergy, in most cases, do not allow flash during the ceremony. You can always cover up/edit out the glitches at the reception in post.

[LouBruno]

I found CMOS really interfered with my FAST bicycling videos. A very fast pan actually looks like a blob of Jell-O. I can't imagine a fast speedway car race. Bringing up shutter speed doesn't help either as it is the nature of the CMOS chip. However, I find smearing less, and colors more vivid. I feel sorry for the Wedding and Special Event people in regards to guests and photographers using a flash. The sports videographer has a real challenge as posted below with fast action shots.

FAST PAN BELOW WITH CMOS CHIPS

[Volker]

Sony FX7 (sold) :

[PaulBusta]

How could Sony sell a piece of junk like that?

[mykle]

My Nikon D300 also makes a propeller look like this (almost) at a shutter speed of about 1/1000 sec. or more. Almost all SLR-cameras have a shutter that exposes the picture througt a moving slit that runs from the top to the bottom of the picture, unless when using the flash.

[TimKennelly]

I would not buy a CMOS based camcorder to take still shots of fast moving objects.

Of course, I would not buy any camcorder for this.

I am primarily a wedding videographer and make a habit of not firehosing while shooting so the wobblies do not bother me.

I would not buy a CMOS based cam for high action/movement sports for the same reason.

I think the rolling shutter issue is overblown and you can shoot to minimize it if you understand it.

Yes, it occurs and unless you specifically shoot to emphasize it the look does not bother me and it does not bother many other professionals, let alone the customers.

Moving video is pretty forgiving, yes if you look at the video in stopped frames the variable half lit frames are obvious and so I would not use a CMOS cam for the purpose of stills in this case.

Wait a minute, I already said that earlier regarding the wobblies, well the same goes here as I would not buy any camcorder for the purpose of stills.

I would refute that the Sony FX7 is a "piece of junk" or that only idiots would buy CMOS cams and to say so is certainly full of disrespect even with a disclaimer claiming otherwise.

I shoot weddings with them so count me as one of those "idiots" and I would be in good company as Franklin Bencosme uses the Sony Z5 (another CMOS based cam) and I doubt there is single non-idiot on this forum that can even come close to matching his work.

PS - I am not truly insulted here as I am fully confident in my choices and abilities and I understand getting carried away when there had been no descenting voices in the thread up until my post, but please realize those of you who do not like CMOS cams are just one side of an opinion in the video world.

Like most things, it's not that cut and dried.

[BobC]

I've been using CMOS cams for a year and a half without issue. Would I like to not have the rolling shutter? Of course, but it just hasn't been a problem for me and my clients.

[TimKennelly]

You are right about the popularity of these cams as they have been taking the consumers (you know, your clients) by storm.

The Canon HV30 is a CMOS based cam that has been one of the top (if not the top) selling HD cam on the market since 2007.

Of course, you can always find someone who knows someone who doesn't like something about anything.

I won't question the capabilities and comptetency of your two unnamed and unknown videogaphers (and I certainly will not call them idiots), but I will question having wobblies in the finished product.

To me that means either they had not yet learned how to properly handle the cam and adjust their style or they need to review the fundamentals of editing footage.

I will also say I know considerably more than two videographers that have shot far more than two separate weddings (with CMOS chips), edited on more than two separate machines, who are excellent shooters and editors that do mostly high end weddings.

Successfully.

So we will have to agree to disagree as I have been sucessfully shooting with CMOS for two and a half years without a single complaint and I am certainly far from the only one having success with this and will not suddenly decide I cannot continue to do so on the basis of your opinion.

PS - Hey Bob, nice to see you at MGT, wish we would have gotten to talk a bit more and welcome to the rank of the idiots.

[IanPearson]

You seem to be having one of those weeks Tim and international at that.

Seconds out, round……

Ian