jeff_palmucci

<p>A bench in Harvard's Arnold Arboretum. I swear I did not touch the saturation!</p>

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<p>5D2 & 50L @ 1.2 at about a meter.</p>

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<p>Spectacle Island, Boston Harbor.</p>

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<p>Boston Harbor<br>

<img src="http://www.machineinsight.com/~jpalmucci/phpAlbum/main.php?cmd=imageorig&var1=Favorite+Pics/IMG_0931.jpg" alt="" width="700" height="467" /></p>

<p>I just made this decision myself. I have the 70-200 2.8 II, so the extra reach was not essential for me. It came down to the IS vs the extra stop.<br>

The IS corrects for hand shake. The rule of thumb for hand shake is shoot faster than 1 / focal length. For the max extension of the 105, thats 1/105. <br>

The IS gives you 3 stops more shutter time wrt hand shake. At one stop, that means you can shoot at 1/52.5. Useful.<br>

At 2 stops that is 1/26.5. Less useful. Subjects (unless they are posing) start to get blurry.<br>

At three stops, that is 1/13.125. Not useful unless you are shooting still life.<br>

These numbers are also at the extreme end of the zoom. At 24mm, the IS isn't that useful at all.<br>

Therefore, since I only found 1 stop of IS to be really useful, and the 24-70 gives you that stop advantage for all situations (not just hand shake), I went for the 24-70.</p>