08-08-2011, 08:21 PM
[quote name='popo' timestamp='1312832497' post='10525']
Or am I applying that incorrectly, or fails to take consideration of some other effect?
[/quote]
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
Or am I applying that incorrectly, or fails to take consideration of some other effect?
[/quote]
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
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