How to be sure IS is working ?

naresh666 · 11th February 2008

i bought a 28-136mm IS USM from the BnS. I would like to know how can i be sure the IS is working?

I have tried taking pics with and without and sometimes it feels like its working and sometimes it feels like its not.

also the lens when used at night , on autofocus does not fire off. after focusing the cammera shutter does not fire off.

y?

thanks

JW73 · 11th February 2008

Originally Posted by naresh666

i bought a 28-136mm IS USM from the BnS. I would like to know how can i be sure the IS is working?

I have tried taking pics with and without and sometimes it feels like its working and sometimes it feels like its not.

also the lens when used at night , on autofocus does not fire off. after focusing the cammera shutter does not fire off.

y?

thanks

U will feel or see a a "floating" image on the viewfinder. If not, it means u are holding it very steadily.
If u want to test, shake abit and u can see the image in viewfinder floats.

blurry80 · 11th February 2008

you'll feel the image is floating in the viewfinder, so subtle that you feel its weird unlike non is lenses.

LaoBuSiDe · 11th February 2008

you should also hear a soft whirling (or is it soft clicking?) sound. This also indicates the IS is working.

naresh666 · 13th February 2008

thanks for all the tips . yeah there is a whirring sound.

i realised my pics were blr at nite even when the IS was on. i had set the iso to 100.

bmped it to 1600 and all seems good.

ditikolon · 13th February 2008

Originally Posted by naresh666

also the lens when used at night , on autofocus does not fire off. after focusing the cammera shutter does not fire off.

Congrats on your purchase of a good lens, especially if its the older one with ring-type USM.
What do you mean by this? I think maybe too little light for the AF module to work, either try manual focus or fire your onboard flash's AF assist beam. hehe.

unseenshadows · 13th February 2008

The IS in the 28-135 is approximately 2 stops. Good enough to compensate for slight camera shake but not a miracle worker. Your lens hunts at night and in low light because the aperture (even at wide open) is not big enough. IS will not completely eliminate blur photos from camera shake/longer shutter speeds.

11th February 2008	#1
naresh666 Member Join Date: Sep 2002 Location: Ang Mo Kio Posts: 684	How to be sure IS is working ? i bought a 28-136mm IS USM from the BnS. I would like to know how can i be sure the IS is working? I have tried taking pics with and without and sometimes it feels like its working and sometimes it feels like its not. also the lens when used at night , on autofocus does not fire off. after focusing the cammera shutter does not fire off. y? thanks __________________ http://this-is-cameraaa.blogspot.com/ www.nareshinc.com

11th February 2008	#3
blurry80 Member Join Date: Jul 2007 Location: Toa Payoh Posts: 433	Re: How to be sure IS is working ? you'll feel the image is floating in the viewfinder, so subtle that you feel its weird unlike non is lenses.

11th February 2008	#4
LaoBuSiDe New Member Join Date: Mar 2007 Posts: 24	Re: How to be sure IS is working ? you should also hear a soft whirling (or is it soft clicking?) sound. This also indicates the IS is working. __________________ EOS 400D, 18-55mm f/3.5-5.6, 50mm f/1.8, 70-300mm f/4-5.6 IS

13th February 2008	#5
naresh666 Member Join Date: Sep 2002 Location: Ang Mo Kio Posts: 684	Re: How to be sure IS is working ? thanks for all the tips . yeah there is a whirring sound. i realised my pics were blr at nite even when the IS was on. i had set the iso to 100. bmped it to 1600 and all seems good. __________________ http://this-is-cameraaa.blogspot.com/ www.nareshinc.com

13th February 2008	#7
unseenshadows Member Join Date: Oct 2007 Location: Marine Parade, Singapore Posts: 718	Re: How to be sure IS is working ? The IS in the 28-135 is approximately 2 stops. Good enough to compensate for slight camera shake but not a miracle worker. Your lens hunts at night and in low light because the aperture (even at wide open) is not big enough. IS will not completely eliminate blur photos from camera shake/longer shutter speeds. __________________ I shoot film.