What makes IS work?

peregrineflier · 10th of November 2010 (Wed)

Hi, it seems like my IS works better in brighter light, but I really don't know what makes it work, so I am not sure what to make of this. : )

Tom

wunhang · 10th of November 2010 (Wed)

From wikipedia....

In Nikon and Canon's implementation, it works by using a floating lens element that is moved orthogonally to the optical axis of the lens using electromagnets.[3] Vibration is detected using two piezoelectric angular velocity sensors (often called gyroscopic sensors), one to detect horizontal movement and the other to detect vertical movement.[4] As a result, this kind of image stabilizer only corrects for pitch and yaw axis rotations,[5] and cannot correct for rotation around the optical axis. Some lenses have a secondary mode that counteracts vertical camera shake only. This mode is useful when using a panning technique, and switching into this mode depends on the lens; sometimes it is done by using a switch on the lens, or it can be automatic.
Some of Nikon's more recent VR-enabled lenses offer an 'Active Mode' that is intended to be used when shooting from a moving vehicle, such as a car or boat, and should correct for larger shakes than the 'Normal Mode'.[6] However, Active Mode, when used under normal shooting conditions, can result in poorer results than the 'Normal Mode'.[7]
Most manufacturers suggest that the IS feature of a lens be turned off when the lens is mounted on a tripod as it can cause erratic results and is generally unnecessary. Many modern image stabilization lenses (notably Canon's more recent IS lenses) are able to auto-detect that they are tripod-mounted (as a result of extremely low vibration readings) and disable IS automatically to prevent this and any consequent image quality reduction.[8] The system also draws power from the battery, so de-activating it when it is not needed will extend the time before a recharge is required.

Steve-R · 10th of November 2010 (Wed)

The IS system is not affected by light levels. It relies on measurements from the rate gyros to counteract the rotational movement of the lens. The autofocus system, on the other hand, will work better in brighter light, so perhaps you are seeing the effect of more accurate focus on your photos.

Another factor could be that brighter light means faster shutter speeds available, so the IS system will have less movement to correct for (less work to do).

Replaces · 10th of November 2010 (Wed)

Quote:

Originally Posted by Steve-R

The IS system is not affected by light levels. It relies on measurements from the rate gyros to counteract the rotational movement of the lens. The autofocus system, on the other hand, will work better in brighter light, so perhaps you are seeing the effect of more accurate focus on your photos.

Another factor could be that brighter light means faster shutter speeds available, so the IS system will have less movement to correct for (less work to do).

+1 on that.

sangjiny · 10th of November 2010 (Wed)

Quote:

Originally Posted by Steve-R

The IS system is not affected by light levels. It relies on measurements from the rate gyros to counteract the rotational movement of the lens. The autofocus system, on the other hand, will work better in brighter light, so perhaps you are seeing the effect of more accurate focus on your photos.

Another factor could be that brighter light means faster shutter speeds available, so the IS system will have less movement to correct for (less work to do).

Yup.

CyberDyneSystems · 10th of November 2010 (Wed)

More reading here;

http://photography-on-the.net/forum/...24#post1066324

gasrocks · 10th of November 2010 (Wed)

Electricity?

richardfox · 10th of November 2010 (Wed)

Quote:

Originally Posted by gasrocks

Electricity?

Yeah. I invented electricity several years ago. I get a royalty of .01 per volt. Please forward your check as you're past due!

The autofocus systems draw from the camera battery just like the IS.

Wade Rose · 10th of November 2010 (Wed)

wow I have to remove my lightning rod from my Lens LOL

Gabe63 · 10th of November 2010 (Wed)

If you have bright light you dont need IS.

dektol · 10th of November 2010 (Wed)

Is is the best thing that ever happened for me! Bright Light don't do anything for me, as I am 80 years old and need all the help I can get.

Dave

turkleten · 10th of November 2010 (Wed)

Quote:

Originally Posted by Gabe63

If you have bright light you dont need IS.

+1

Your shutter speed takes care of that!

ScullenCrossBones · 10th of November 2010 (Wed)

Al Gore invented IS. And on the seventh day, he rested.

10th of November 2010 (Wed)	#1
peregrineflier Goldmember Join Date: Jan 2010 Posts: 4,029 IMAGE EDITING OK	What makes IS work? Hi, it seems like my IS works better in brighter light, but I really don't know what makes it work, so I am not sure what to make of this. : ) Tom __________________ Thanks, Tom the Peregrineflier Lyle Washington Canon 1D mk3, Canon 100-400 L, Canon 300mm f/4L IS http://peregrineflier.smugmug.com/

10th of November 2010 (Wed)	#2
wunhang Member Join Date: Nov 2009 Location: SoCal Posts: 455 IMAGE EDITING OK	Re: What makes IS work? From wikipedia.... In Nikon and Canon's implementation, it works by using a floating lens element that is moved orthogonally to the optical axis of the lens using electromagnets.[3] Vibration is detected using two piezoelectric angular velocity sensors (often called gyroscopic sensors), one to detect horizontal movement and the other to detect vertical movement.[4] As a result, this kind of image stabilizer only corrects for pitch and yaw axis rotations,[5] and cannot correct for rotation around the optical axis. Some lenses have a secondary mode that counteracts vertical camera shake only. This mode is useful when using a panning technique, and switching into this mode depends on the lens; sometimes it is done by using a switch on the lens, or it can be automatic. Some of Nikon's more recent VR-enabled lenses offer an 'Active Mode' that is intended to be used when shooting from a moving vehicle, such as a car or boat, and should correct for larger shakes than the 'Normal Mode'.[6] However, Active Mode, when used under normal shooting conditions, can result in poorer results than the 'Normal Mode'.[7] Most manufacturers suggest that the IS feature of a lens be turned off when the lens is mounted on a tripod as it can cause erratic results and is generally unnecessary. Many modern image stabilization lenses (notably Canon's more recent IS lenses) are able to auto-detect that they are tripod-mounted (as a result of extremely low vibration readings) and disable IS automatically to prevent this and any consequent image quality reduction.[8] The system also draws power from the battery, so de-activating it when it is not needed will extend the time before a recharge is required. __________________ Canon 5D II \| Canon XSI (IR) \| 35 L f/1.4 \| 17-40 L f/4.0 \| 24-105 L f/4.0 IS \| 70-200 L f/4.0 IS \| Zeiss 100 MP \| C/Y 50mm f/1.7 ::SmugMug::

10th of November 2010 (Wed)	#3
Steve-R Member Join Date: Sep 2007 Location: Virginia Posts: 235	Re: What makes IS work? The IS system is not affected by light levels. It relies on measurements from the rate gyros to counteract the rotational movement of the lens. The autofocus system, on the other hand, will work better in brighter light, so perhaps you are seeing the effect of more accurate focus on your photos. Another factor could be that brighter light means faster shutter speeds available, so the IS system will have less movement to correct for (less work to do). __________________ Steve Canon 40D, 10-22, 28-105, 70-300 f/4-5.6, 100 f/2.8 Tamron 17-50 f/2.8, Tokina 10-17 Fisheye, Tokina 35 f/2.8

10th of November 2010 (Wed)	#6
CyberDyneSystems Wait, all that time and all I get is "Cream of the Damn Crop" ?!!!!!!!!!!!!!!!! Join Date: Apr 2003 Location: Providence RI Posts: 37,419 IMAGE EDITING OK	Re: What makes IS work? More reading here; http://photography-on-the.net/forum/...24#post1066324 __________________ GEAR LIST CDS' HOT LINKS My POTN Share Threads Jake Hegnauer Photography

10th of November 2010 (Wed)	#7
gasrocks Cream of the Crop Join Date: Mar 2005 Location: Portage, Wisconsin USA Posts: 12,476	Re: What makes IS work? Electricity? __________________ GEAR LIST http://photography-on-the.net/forum/...&postcount=842

10th of November 2010 (Wed)	#9
Wade Rose Member Join Date: Feb 2010 Location: Henderson Neveda Posts: 157	Re: What makes IS work? wow I have to remove my lightning rod from my Lens LOL __________________ Wade Rose All photos posted on flickr http://www.flickr.com/photos/60992828@N00/ Canon 5D mark II Canon 40D

10th of November 2010 (Wed)	#10
Gabe63 Member Join Date: Dec 2007 Location: Lafayette, CA Posts: 605	Re: What makes IS work? If you have bright light you dont need IS. __________________ 16-35IIL, 50L, 70-200 2.8 IS L, 200L F2.

10th of November 2010 (Wed)	#11
dektol Junior Member Join Date: Jun 2007 Location: Indiana Posts: 18	Re: What makes IS work? Is is the best thing that ever happened for me! Bright Light don't do anything for me, as I am 80 years old and need all the help I can get. Dave

10th of November 2010 (Wed)	#13
ScullenCrossBones Member Join Date: May 2009 Location: Keller, TX Posts: 776 IMAGE EDITING OK	Re: What makes IS work? Al Gore invented IS. And on the seventh day, he rested. __________________ Gear Mama done took my Kodachrome away...

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