The 150 gives you the same magnification as the 105VR; 1:1. What the 150 gives you is an additional 3" of working space. I rarely shoot anything without a tripod so I'm probably not the best one to ask about VR (or IS).
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Doug
[I]Dodging and burning are steps to take care of mistakes God made when establishing tonal relationships. ~ Ansel Adams[/I]
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