03-14-2014, 06:55 AM
(This post was last modified: 03-14-2014, 07:00 AM by Brightcolours.)
For the 70-300mm it is normal behavior. What you see is the VC transition from inactive to active. VC/IS/OS always will need some time to stabilise, and different models will show different start up behavior.
The way to check your VC is to turn it off and take a photo at 300mm at 1/25th of a second. It will not be sharp due to camera shake. Do the same with VC turned on. It will be sharper, and VC works.
The 90mm lens doesn't have exactly the same VC module, for it being a different lens. Image stabilization modules get designed per lens, due to different needs (different focal length, prime or zoom).
The way to check your VC is to turn it off and take a photo at 300mm at 1/25th of a second. It will not be sharp due to camera shake. Do the same with VC turned on. It will be sharper, and VC works.
The 90mm lens doesn't have exactly the same VC module, for it being a different lens. Image stabilization modules get designed per lens, due to different needs (different focal length, prime or zoom).