By connecting your Canon camera to a computer with a USB cable, the camera will. Currently there are 113 lenses for Canon EF/EF-S mount with Optical Image Stabilization features. EOS Webcam Utility 1.1 Windows EOS Webcam Utility 1.1 is a software solution which unlocks webcam-like capabilities for select EOS Inter-Changeable Lens and PowerShot cameras. On the other hand, Canon 7D doesn't have this feature so you have to buy a lens with optical stabilization feature. Sony A37 has a big advantage in this regard because it has a sensor based image stabilization which means that all the lenses mounted to this body will be stabilized.
There are 333 lenses for Canon 7D's Canon EF/EF-S mount, on the other hand there are only 143 lenses for Sony A37's Sony/Minolta Alpha lens mount.Īnother important factor is the availability of image stabilization. The new Canon firmware 2.0.X that will be fixing audio in the 7D and finally allow manual controls is available for download. When we look at the available lenses for these two cameras, we see that Canon 7D has an advantage over Sony A37. Weve been talking about it for what seems like an eternity now, people have been asking for it, and Canon has delivered. The beauty of using this over say Av or Tv mode is that the background tone does not influence the exposure.Number of available lenses is a big decision factor while choosing your interchangeable lens camera. Now this is fine for evenly toned birds (in the ambient light) but for light or dark birds you have to change the exposure by reducing or increasing the shutter speed but as explained above this does not work if you are using auto ISO.
This is no good for my manual method with birds as I set the ISO and metre off of something around 18% grey and set the returned shutter speed and aperture to suit. But this does not work if you are on auto ISO (Canons) - all that happens is when you change the aperture or shutter speed is that the ISO changes to counteract the exposure change you wanted so the metre is always on zero (unless it needs less than ISO 100 or more than 1/8000 sec thus exceeding the cameras capabilities) Click to expand.Normally when shooting in manual you can change the metering by altering the shutter speed or aperture - so if you set say f5.6 and 1/1000 sec and lets say you want Ev+1 on that then you would just change the aperture to f4 or the shutter speed to 1/500 sec and you will be changing the exposure.
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