08-08-2011, 08:52 PM
[quote name='mst' timestamp='1312834903' post='10529']
Maybe ... I did not calculate, but simply read the values from the D3x's LCD <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />
In the end, there's not much calculation needed. The naked lens has an effective aperture of f/5.6. A 1.4x TC adds one stop (f/8), a 2x TC another stop (f/11).
-- Markus
[/quote]
I think that doesn't take into consideration the extra magnification. I first saw the equation I used in the MP-E65 manual. Things get scary rapidly at 5x magnification...
Maybe ... I did not calculate, but simply read the values from the D3x's LCD <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />In the end, there's not much calculation needed. The naked lens has an effective aperture of f/5.6. A 1.4x TC adds one stop (f/8), a 2x TC another stop (f/11).
-- Markus
[/quote]
I think that doesn't take into consideration the extra magnification. I first saw the equation I used in the MP-E65 manual. Things get scary rapidly at 5x magnification...
<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.