10-10-2012, 11:26 AM
What I suspect is happening on the scale is that as they make the same lens but just change the mount for different cameras, and they might not have taken enough care to get the spacing exactly right. So you end up with an extension tube effect on the focus range. For example, on my fisheye as I got it, focus was much further out than indicated. By loosening some screws you can align it to the scale which also gave me the specified near focus range too.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.