black dot on my footage

Yow Siang · April 9th, 2007, 08:51 PM

Just bought a HC7 and notice a huge black dot appearing on my video footages it is only viewable at higher aperture around f8 and above...
looks like a dirt falls on the cmos but how is it possible?

Jeff DeMaagd · April 10th, 2007, 06:26 AM

Quote:

Originally Posted by Yow Siang

Just bought a HC7 and notice a huge black dot appearing on my video footages it is only viewable at higher aperture around f8 and above...
looks like a dirt falls on the cmos but how is it possible?

I don't think it's on the CMOS itself, otherwise you would always see it, no matter the aperture. It's probably a speck or flaw on one of the lenses nearest to the aperture. I suggest exchanging it to get another camera or to get it serviced under warranty.

Yow Siang · April 16th, 2007, 07:19 PM

My HC7 is now "Hospitalised" in the "Sony Hospital" Found another problem too.. that is in indoor lighting when i try to increase shutter speed to 300 i see black scanning lines on the lcd screen.. but it looks fine is outdoor lighting.. any idea why?

Quote:

Originally Posted by Jeff DeMaagd

I don't think it's on the CMOS itself, otherwise you would always see it, no matter the aperture. It's probably a speck or flaw on one of the lenses nearest to the aperture. I suggest exchanging it to get another camera or to get it serviced under warranty.

Dave Blackhurst · April 16th, 2007, 11:14 PM

I'm going to venture a guess you were dealing with "indoor" lighting that cycled at the same speed as the shutter (like 50/60hz "noise") - perhaps flourescents?

Did the problem show on tape and/or the viewfinder - I've noticed some horizontal "noise" on my LCDs - perhaps it's interference with how the LCD refreshes?

Just a couple WAG's, but I'm a tech in another life, so I've seen some strange things and am pretty decent at diagnostics...

DB>)

April 9th, 2007, 08:51 PM	#1
Yow Siang Regular Crew Join Date: Jan 2003 Location: Singapore Posts: 153	black dot on my footage - HC7 Just bought a HC7 and notice a huge black dot appearing on my video footages it is only viewable at higher aperture around f8 and above... looks like a dirt falls on the cmos but how is it possible?

April 16th, 2007, 11:14 PM	#4
Dave Blackhurst Inner Circle Join Date: Feb 2007 Location: Apple Valley CA Posts: 4,874	I'm going to venture a guess you were dealing with "indoor" lighting that cycled at the same speed as the shutter (like 50/60hz "noise") - perhaps flourescents? Did the problem show on tape and/or the viewfinder - I've noticed some horizontal "noise" on my LCDs - perhaps it's interference with how the LCD refreshes? Just a couple WAG's, but I'm a tech in another life, so I've seen some strange things and am pretty decent at diagnostics... DB>)