lens making sound at DVinfo.net

Dharma Singh · August 16th, 2005, 06:51 AM

I want to some informtion regrading the XL 2 pal which i bought a few days back.
When i switch on the camera to [A}, i hear some mechanical sound in
the lens like ( Kitik, Ktik...Ktik) apart from the noise of movement of
lens and then the camera shows the picture in the veiw finder.Along
with this if i look into the lens while switching on the power.The internal lens optics move back and then comes to the same position and there is shiver in this process inside the lens .This happens only at the initial power on for a couple of seconds and then the camera shoots perfectly.
I removed the lens and then switched the camera on .There was no
sound.I presume that the sound is coming from the lens. Is this
normal? Is is sofeware corrupt.Or did i buy a wrong peice.
Hope to get replies from new XL users as well.
Thanks

Chris Hurd · August 16th, 2005, 07:06 AM

Hi Dharma,

The sound you hear in the lens is simply the various mechanisms inside going through a calibration procedure. This always occurs on initial power-up and is quite normal -- nothing to worry about. All is well with your camera. Hope this helps,

Dharma Singh · August 16th, 2005, 07:24 AM

Thanks Chris ,
I already got your reply regarding this .So the sound part is no more a worryI would appreciate if you could tell more about the shiver which i see in the lens during initial start up.Why does the lens move back and then come back to its initial position shivering. Thanks again for looking ito this.

Chris Hurd · August 16th, 2005, 07:33 AM

Well I'll check my sources on that lens travel. Rest assured though that *all* of 'em do it -- your camera is behaving just like every other XL2 ever made. In other words, there's no problem associated with what you're seeing in the lens on power-up. I'm not geeky enough to know why exactly it does that (beyond the generic "calibration" answer), but I'll try to find out for you.

Mike Teutsch · August 16th, 2005, 07:57 AM

I used to work with CNC, Computer Numeric Controlled equipment, such as industrial milling machines.

The first thing all of these servo controlled devices have to do during start-up, is to find "Home." They have to know where they are before they can go anywhere. There is a limit switch somewhere just past the limit of movement or travel. Once that limit is reached, the servo knows where it is, then it moves to a predetermined start location. You might find that each time you turn on the camera, that the focus, zoom, and iris are at the same location each time.

Just for your thought.

Mike

Chris Hurd · August 16th, 2005, 08:05 AM

Awesome answer, Mike! That's it. Much appreciated,

Dharma Singh · August 16th, 2005, 08:37 AM

Thanks Chris & Mike,
I am now confident that my camera is perfectly ok. Mike's explanation about the servo devices is exactly what the lens does.
I had discussed the same topic with the Canon service guys in India and they could nt give me a confident answer to it. They started suggesting a software problem and i am sure they have never bothered to see into the lens or hearing the sound in the lens.And further suggested that if one buys the camera and lens seperately, there is compatibality problems.Is it true?
I presume XL2 is still new for them in India.

Sincerly
Dharma Singh

Chris Hurd · August 16th, 2005, 08:48 AM

Quote:

...suggested that if one buys the camera and lens seperately, there is compatibality problems. Is it true?

Absolutely FALSE. The whole point behind the XL2 is its interchangeable lens system, and any other lens you buy would be a separate purchase, wouldn't it? The XL2 doesn't care which XL lens is mounted on it. Mix and match, trade with friends, swap out those lenses to your heart's content.

Ben Hurst · August 16th, 2005, 10:25 AM

I think the lens "shivers" and shakes like that only when the lens has the image stabilizer switch on (?) That is why I never use the image stabilizer.

Greg Boston · August 16th, 2005, 10:35 AM

Quote:

Originally Posted by Ben Hurst

I think the lens "shivers" and shakes like that only when the lens has the image stabilizer switch on (?) That is why I never use the image stabilizer.

Yes Ben,

That would be why it 'shivers' at power up. The VAP is being initialized by the IS gyros at power up. Why would this keep you from using the image stabilizer?

-gb-

Chris Hurd · August 16th, 2005, 10:47 AM

Quote:

Originally Posted by Ben Hurst

I think the lens "shivers" and shakes like that only when the lens has the image stabilizer switch on (?)

Sorry, incorrect -- the "shiver and shake" happens at initial power-up regardless of whether the image stabilizer switch is on or off, or whether the focus is set to manual or auto. Simply put, this calibration process occurs every time at power-up, no matter what buttons or switches you've pressed on the lens. It's very much a standard, normal part of the camera's power-up procedure.

Quote:

Originally Posted by Ben Hurst

That is why I never use the image stabilizer.

I'm as confused as Greg Boston is by this statement. Why would this keep you from using your stabilizer?

If the lens movement does *not* happen at power-up, then that would be cause for concern. It would indicate that something isn't working right, and that you have either a sick XL2 or a broken 20x lens in your hands.

To recap:

20x lens elements move on initial power-up: GOOD
20x lens elements do NOT move on power-up: BAD

16x manual lens: no OIS, no AF on that lens, so no movement on power-up.

Hoping this helps,

Ben Hurst · August 16th, 2005, 10:53 AM

Sorry, correction: that shiver is not why I don't use the image stabilizer, I don't use the image stabilizer at all...period. I don't like it. Plus I was born with steadicam© hands and arms.

Richard Hunter · August 16th, 2005, 06:07 PM

Hi Ben. Can you please explain what you don't like about the IS? I'm not challenging you or anything, I am just very curious about what effect the IS is giving that you prefer not to have. For example, on my Sony VX2000, I sometimes get jerkiness due to the IS when I try to do a slow pan, but I haven't noticed this on the XL2 so far.

Richard

Ben Hurst · August 17th, 2005, 02:14 PM

you know, I haven't really given it a great test. When I have had it on in the past, there is a delay when I pan around, kind of a slight drag and I think it throws off the smooth movement that I like to control myself. I'll try it out on some more tests and get back to you.

Terry Yuen · September 16th, 2005, 10:24 AM

Quote:

Originally Posted by Richard Hunter

. For example, on my Sony VX2000, I sometimes get jerkiness due to the IS when I try to do a slow pan, but I haven't noticed this on the XL2 so far.

Richard

Hi Richard, is it true that the XL2 can do panning in IS mode on tripod without the jerkiness like the XL1s does?

August 16th, 2005, 06:51 AM	#1
Dharma Singh New Boot Join Date: Aug 2005 Location: New Delhi, India Posts: 11	lens making sound I want to some informtion regrading the XL 2 pal which i bought a few days back. When i switch on the camera to [A}, i hear some mechanical sound in the lens like ( Kitik, Ktik...Ktik) apart from the noise of movement of lens and then the camera shows the picture in the veiw finder.Along with this if i look into the lens while switching on the power.The internal lens optics move back and then comes to the same position and there is shiver in this process inside the lens .This happens only at the initial power on for a couple of seconds and then the camera shoots perfectly. I removed the lens and then switched the camera on .There was no sound.I presume that the sound is coming from the lens. Is this normal? Is is sofeware corrupt.Or did i buy a wrong peice. Hope to get replies from new XL users as well. Thanks

August 16th, 2005, 07:06 AM	#2
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	Hi Dharma, The sound you hear in the lens is simply the various mechanisms inside going through a calibration procedure. This always occurs on initial power-up and is quite normal -- nothing to worry about. All is well with your camera. Hope this helps, __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

August 16th, 2005, 07:33 AM	#4
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	Well I'll check my sources on that lens travel. Rest assured though that all of 'em do it -- your camera is behaving just like every other XL2 ever made. In other words, there's no problem associated with what you're seeing in the lens on power-up. I'm not geeky enough to know why exactly it does that (beyond the generic "calibration" answer), but I'll try to find out for you. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

August 16th, 2005, 07:57 AM	#5
Mike Teutsch Inner Circle Join Date: Oct 2004 Location: Port St. Lucie, Florida Posts: 2,614	I used to work with CNC, Computer Numeric Controlled equipment, such as industrial milling machines. The first thing all of these servo controlled devices have to do during start-up, is to find "Home." They have to know where they are before they can go anywhere. There is a limit switch somewhere just past the limit of movement or travel. Once that limit is reached, the servo knows where it is, then it moves to a predetermined start location. You might find that each time you turn on the camera, that the focus, zoom, and iris are at the same location each time. Just for your thought. Mike __________________ Chapter one, line one. The BH.

August 16th, 2005, 08:05 AM	#6
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	Awesome answer, Mike! That's it. Much appreciated, __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

August 16th, 2005, 07:24 AM	#3
Dharma Singh New Boot Join Date: Aug 2005 Location: New Delhi, India Posts: 11	Thanks Chris , I already got your reply regarding this .So the sound part is no more a worryI would appreciate if you could tell more about the shiver which i see in the lens during initial start up.Why does the lens move back and then come back to its initial position shivering. Thanks again for looking ito this.

August 16th, 2005, 08:37 AM	#7
Dharma Singh New Boot Join Date: Aug 2005 Location: New Delhi, India Posts: 11	Thanks Chris & Mike, I am now confident that my camera is perfectly ok. Mike's explanation about the servo devices is exactly what the lens does. I had discussed the same topic with the Canon service guys in India and they could nt give me a confident answer to it. They started suggesting a software problem and i am sure they have never bothered to see into the lens or hearing the sound in the lens.And further suggested that if one buys the camera and lens seperately, there is compatibality problems.Is it true? I presume XL2 is still new for them in India. Sincerly Dharma Singh

August 16th, 2005, 10:25 AM	#9
Ben Hurst New Boot Join Date: Aug 2005 Location: Austin, TX Posts: 22	I think the lens "shivers" and shakes like that only when the lens has the image stabilizer switch on (?) That is why I never use the image stabilizer.

August 16th, 2005, 10:53 AM	#12
Ben Hurst New Boot Join Date: Aug 2005 Location: Austin, TX Posts: 22	Sorry, correction: that shiver is not why I don't use the image stabilizer, I don't use the image stabilizer at all...period. I don't like it. Plus I was born with steadicam© hands and arms.

August 16th, 2005, 06:07 PM	#13
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	Hi Ben. Can you please explain what you don't like about the IS? I'm not challenging you or anything, I am just very curious about what effect the IS is giving that you prefer not to have. For example, on my Sony VX2000, I sometimes get jerkiness due to the IS when I try to do a slow pan, but I haven't noticed this on the XL2 so far. Richard

August 17th, 2005, 02:14 PM	#14
Ben Hurst New Boot Join Date: Aug 2005 Location: Austin, TX Posts: 22	you know, I haven't really given it a great test. When I have had it on in the past, there is a delay when I pan around, kind of a slight drag and I think it throws off the smooth movement that I like to control myself. I'll try it out on some more tests and get back to you.