K7 - image stabilisation on or off?

Kai · 02-24-2011, 12:32 AM

Originally posted by RobG

Here's another short clip I took today with the K7 and the Rode stereo videomic. Let me know if you can hear the noise you're talking about.

Vimeo: Error

No, I don't hear it. Thank you.

Kai · 02-24-2011, 12:34 AM

Originally posted by jogiba

[YT]http://www.youtube.com/watch?v=m9L-y42Nj58[/YT]

[YT]http://www.youtube.com/watch?v=5zCiuh_UWLc[/YT]

I hear similar noise but different than mine. Mine is more of a medium drum if it makes any sense to you. These two are more of metal screeching noise.

Kai · 02-24-2011, 12:48 AM

Here is also another test clip. I heard on my computer at 7, 8, 22, 23, 25, & 26 sec mark. There is some focus ring turning noise that you should probably ignore.

BTW, there may be some DC Click noise again. I don't hear it on my computer. But at the last few times, I heard it after uploading to Vimeo. It was annoying that I deleted those.

Thank you for taking a look.

RobG · 02-24-2011, 04:48 AM

Originally posted by Kai

I hear similar noise but different than mine. Mine is more of a medium drum if it makes any sense to you. These two are more of metal screeching noise.

OK, there's a sort of metallic scratching. This is using the internal microphone of the camera?

RobG · 02-24-2011, 04:51 AM

Originally posted by Kai

Here is also another test clip. I heard on my computer at 7, 8, 22, 23, 25, & 26 sec mark. There is some focus ring turning noise that you should probably ignore.

BTW, there may be some DC Click noise again. I don't hear it on my computer. But at the last few times, I heard it after uploading to Vimeo. It was annoying that I deleted those.

Thank you for taking a look.

Here I think the noise you're talking about sounds more like a wooden thunk? Of course it's difficult for me to know, because you know what the audio track shouldn't contain and I don't. I don't think I've heard those noises with my camera, but then I usually use the Rode microphone to get stereo sound. The Rode mic has an acoustic isolation system plus the "dead kitten" to reduce wind noise.

Kai · 02-24-2011, 11:35 PM

Originally posted by RobG

OK, there's a sort of metallic scratching. This is using the internal microphone of the camera?

Nop, that's was the external mic on the 3.5 plug.

Kai · 02-24-2011, 11:37 PM

Originally posted by RobG

Here I think the noise you're talking about sounds more like a wooden thunk? Of course it's difficult for me to know, because you know what the audio track shouldn't contain and I don't. I don't think I've heard those noises with my camera, but then I usually use the Rode microphone to get stereo sound. The Rode mic has an acoustic isolation system plus the "dead kitten" to reduce wind noise.

Even the other post with two clips I heard different noise from mine. I think that mic works well for you. Thanks for your thought.

v3t0 · 02-25-2011, 12:12 AM

no..i will encourage you guys to turn off SR for video recording..here are some of the reason why:

1. SR on will make some anoying noise(using internal mic) when you move your camera

2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot..

3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting..

RobG · 02-25-2011, 01:31 AM

Originally posted by Kai

Nop, that's was the external mic on the 3.5 plug.

Oh. Is there any sort of acoustic isolation between the mic and the camera? It's possible that the sound is being transmitted through the metal of the camera body and the microphone mount.

Originally posted by Kai

Even the other post with two clips I heard different noise from mine. I think that mic works well for you. Thanks for your thought.

Try your microphone hand held away from the camera with the camera on a tripod. If the camera still gets the noises, it's a lot harder to explain - that would indicate the noises were caused by electrical interference. With the microphone acoustically isolated by the cord, it shouldn't be possible to conduct vibrations from the camera body.

Kai · 02-25-2011, 11:23 PM

Originally posted by v3t0

no..i will encourage you guys to turn off SR for video recording..here are some of the reason why:

1. SR on will make some anoying noise(using internal mic) when you move your camera

2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot..

3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting..

I agree. The noise was not there when I did not turn on SR.

Originally posted by RobG

Oh. Is there any sort of acoustic isolation between the mic and the camera? It's possible that the sound is being transmitted through the metal of the camera body and the microphone mount.

Try your microphone hand held away from the camera with the camera on a tripod. If the camera still gets the noises, it's a lot harder to explain - that would indicate the noises were caused by electrical interference. With the microphone acoustically isolated by the cord, it shouldn't be possible to conduct vibrations from the camera body.

I am pretty sure it was the SR noise since turning it off would eliminate this sound. Thank you.

RobG · 02-27-2011, 08:50 PM

Originally posted by v3t0

no..i will encourage you guys to turn off SR for video recording..here are some of the reason why:

1. SR on will make some anoying noise(using internal mic) when you move your camera

I use an external microphone which is acoustically isolated from the camera. Most of the time, the stabilisation doesn't cause noises unless you move the camera quickly, which isn't likely to look much good anyway.

Quote:

2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot..

I'll have to do some more comparative tests on this. I'd expect to get blur when moving the camera anyway, and it's preferable to the ugly jerkiness which is visible of you disable stabilisation. The slight jerkiness when hand-holding a camera wasn't as noticeable in the days of standard definition video cameras, but with HD it becomes critical.

Quote:

3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting..

I shot some hand held video yesterday and using image stabilisation was definitely worthwhile. Sure, the best result will be with a tripod and not moving the camera at all, but it's not always possible to do this. With my 55-300 at about 200mm, image stabilisation helped a great deal. Without it, the hand held video was moved unacceptably. With the 16-45 at 16mm and f5.6, I was able to walk slowly with the camera while taking video. Obviously a steadicam would be ideal, but also very expensive.

As I said, I need to experiment more, but most of the time, image stabilisation is useful. For the best results, don't move the camera at all - set it up with a fixed shot on a solid tripod.

02-24-2011, 12:48 AM	#18
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Here is also another test clip. I heard on my computer at 7, 8, 22, 23, 25, & 26 sec mark. There is some focus ring turning noise that you should probably ignore. Vimeo BTW, there may be some DC Click noise again. I don't hear it on my computer. But at the last few times, I heard it after uploading to Vimeo. It was annoying that I deleted those. Thank you for taking a look.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Side effect of stabilisation?	RobG	Pentax DSLR Discussion	57	02-27-2010 01:42 PM
K7 and Shake correction/image stabilisation problem	glenfender	Pentax DSLR Discussion	3	02-26-2010 06:41 AM
Image stabilisation without the tripod	Vylen	Pentax Camera and Field Accessories	9	01-22-2009 05:28 PM
Idea on image stabilisation	quantum	Pentax DSLR Discussion	8	05-20-2008 07:23 PM
image comparison using 'neat image' noise reduction programme.	distorted_vision	Post Your Photos!	18	12-28-2007 04:44 AM

02-24-2011, 12:32 AM	#16
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Originally posted by RobG Here's another short clip I took today with the K7 and the Rode stereo videomic. Let me know if you can hear the noise you're talking about. Vimeo: Error No, I don't hear it. Thank you.

02-24-2011, 12:34 AM	#17
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Originally posted by jogiba [YT]http://www.youtube.com/watch?v=m9L-y42Nj58[/YT] [YT]http://www.youtube.com/watch?v=5zCiuh_UWLc[/YT] I hear similar noise but different than mine. Mine is more of a medium drum if it makes any sense to you. These two are more of metal screeching noise.

02-24-2011, 04:48 AM	#19
RobG Otis Memorial Pentaxian Join Date: Dec 2009 Location: Canberra Photos: Gallery \| Albums Posts: 8,888 Original Poster	Originally posted by Kai I hear similar noise but different than mine. Mine is more of a medium drum if it makes any sense to you. These two are more of metal screeching noise. OK, there's a sort of metallic scratching. This is using the internal microphone of the camera?

02-24-2011, 04:51 AM	#20
RobG Otis Memorial Pentaxian Join Date: Dec 2009 Location: Canberra Photos: Gallery \| Albums Posts: 8,888 Original Poster	Originally posted by Kai Here is also another test clip. I heard on my computer at 7, 8, 22, 23, 25, & 26 sec mark. There is some focus ring turning noise that you should probably ignore. BTW, there may be some DC Click noise again. I don't hear it on my computer. But at the last few times, I heard it after uploading to Vimeo. It was annoying that I deleted those. Thank you for taking a look. Here I think the noise you're talking about sounds more like a wooden thunk? Of course it's difficult for me to know, because you know what the audio track shouldn't contain and I don't. I don't think I've heard those noises with my camera, but then I usually use the Rode microphone to get stereo sound. The Rode mic has an acoustic isolation system plus the "dead kitten" to reduce wind noise.

02-24-2011, 11:35 PM	#21
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Originally posted by RobG OK, there's a sort of metallic scratching. This is using the internal microphone of the camera? Nop, that's was the external mic on the 3.5 plug.

02-24-2011, 11:37 PM	#22
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Originally posted by RobG Here I think the noise you're talking about sounds more like a wooden thunk? Of course it's difficult for me to know, because you know what the audio track shouldn't contain and I don't. I don't think I've heard those noises with my camera, but then I usually use the Rode microphone to get stereo sound. The Rode mic has an acoustic isolation system plus the "dead kitten" to reduce wind noise. Even the other post with two clips I heard different noise from mine. I think that mic works well for you. Thanks for your thought.

02-25-2011, 12:12 AM	#23
v3t0 Inactive Account Join Date: Apr 2010 Posts: 54	no..i will encourage you guys to turn off SR for video recording..here are some of the reason why: 1. SR on will make some anoying noise(using internal mic) when you move your camera 2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot.. 3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting..

02-25-2011, 01:31 AM	#24
RobG Otis Memorial Pentaxian Join Date: Dec 2009 Location: Canberra Photos: Gallery \| Albums Posts: 8,888 Original Poster	Originally posted by Kai Nop, that's was the external mic on the 3.5 plug. Oh. Is there any sort of acoustic isolation between the mic and the camera? It's possible that the sound is being transmitted through the metal of the camera body and the microphone mount. Originally posted by Kai Even the other post with two clips I heard different noise from mine. I think that mic works well for you. Thanks for your thought. Try your microphone hand held away from the camera with the camera on a tripod. If the camera still gets the noises, it's a lot harder to explain - that would indicate the noises were caused by electrical interference. With the microphone acoustically isolated by the cord, it shouldn't be possible to conduct vibrations from the camera body.

02-25-2011, 11:23 PM	#25
Kai Senior Member Join Date: Jun 2009 Location: San Diego, Ca. USA Photos: Gallery \| Albums Posts: 148	Originally posted by v3t0 no..i will encourage you guys to turn off SR for video recording..here are some of the reason why: 1. SR on will make some anoying noise(using internal mic) when you move your camera 2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot.. 3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting.. I agree. The noise was not there when I did not turn on SR. Originally posted by RobG Oh. Is there any sort of acoustic isolation between the mic and the camera? It's possible that the sound is being transmitted through the metal of the camera body and the microphone mount. Try your microphone hand held away from the camera with the camera on a tripod. If the camera still gets the noises, it's a lot harder to explain - that would indicate the noises were caused by electrical interference. With the microphone acoustically isolated by the cord, it shouldn't be possible to conduct vibrations from the camera body. I am pretty sure it was the SR noise since turning it off would eliminate this sound. Thank you.

02-27-2011, 08:50 PM	#26
RobG Otis Memorial Pentaxian Join Date: Dec 2009 Location: Canberra Photos: Gallery \| Albums Posts: 8,888 Original Poster	Originally posted by v3t0 no..i will encourage you guys to turn off SR for video recording..here are some of the reason why: 1. SR on will make some anoying noise(using internal mic) when you move your camera I use an external microphone which is acoustically isolated from the camera. Most of the time, the stabilisation doesn't cause noises unless you move the camera quickly, which isn't likely to look much good anyway. Quote: 2. whenever you move your camera while recording, the image will blur..we all know that we need to move the camera very frequently when recording video..the effect is same when you turn SR on while doing panning shot.. I'll have to do some more comparative tests on this. I'd expect to get blur when moving the camera anyway, and it's preferable to the ugly jerkiness which is visible of you disable stabilisation. The slight jerkiness when hand-holding a camera wasn't as noticeable in the days of standard definition video cameras, but with HD it becomes critical. Quote: 3. SR will cause more jelly effect..you can see by trying to pan your camera from left to right(vice versea)..when you stop moving your camera, you will see that the video is still moving to the right/left due to the SR sensor shifting.. I shot some hand held video yesterday and using image stabilisation was definitely worthwhile. Sure, the best result will be with a tripod and not moving the camera at all, but it's not always possible to do this. With my 55-300 at about 200mm, image stabilisation helped a great deal. Without it, the hand held video was moved unacceptably. With the 16-45 at 16mm and f5.6, I was able to walk slowly with the camera while taking video. Obviously a steadicam would be ideal, but also very expensive. As I said, I need to experiment more, but most of the time, image stabilisation is useful. For the best results, don't move the camera at all - set it up with a fixed shot on a solid tripod.