10-15-2010, 04:50 AM
[quote name='hwyhobo' timestamp='1287000801' post='3619']
I would also love to see an unusual comparison - I would love to see the quality of the lens compared to 700-200 f/2.8 II _with the new 2xTCIII_ at their overlapping focal lengths (140-300mm).
[/quote]
Wouldn't the 1.4x TC make more sense because then there'll be more overlap (99-283mm) with the 28-300? Also it'll be a f/4 vs. f/~4-5.6 comparison.
[quote name='hwyhobo' timestamp='1287000801' post='3619']
I know the cost and weight make them seem like totally different animals, but even more so, I would love to see how much in IQ I give up by going with a smaller, lighter, and cheaper lens.
[/quote]
While some people love their TCs, my recommendation is that if you're going to use one lens with the TC attached most of the time, it's better to get the other lens that doesn't need the TC. TCs are evil in my book <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />
And if you care about IQ, why bother with zooms? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />
[quote name='hwyhobo' timestamp='1287000801' post='3619']
It would also be nice to know at which distance the lens can become a real 300 mm, assuming it is short of infinity.
[/quote]
It'll be 300 at infinity... unless of course, the actual focal length at the tele end is like 299mm or something <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' /> The question is how wide does the tele-end get at close distances.
GTW
I would also love to see an unusual comparison - I would love to see the quality of the lens compared to 700-200 f/2.8 II _with the new 2xTCIII_ at their overlapping focal lengths (140-300mm).
[/quote]
Wouldn't the 1.4x TC make more sense because then there'll be more overlap (99-283mm) with the 28-300? Also it'll be a f/4 vs. f/~4-5.6 comparison.
[quote name='hwyhobo' timestamp='1287000801' post='3619']
I know the cost and weight make them seem like totally different animals, but even more so, I would love to see how much in IQ I give up by going with a smaller, lighter, and cheaper lens.
[/quote]
While some people love their TCs, my recommendation is that if you're going to use one lens with the TC attached most of the time, it's better to get the other lens that doesn't need the TC. TCs are evil in my book <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />And if you care about IQ, why bother with zooms? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />[quote name='hwyhobo' timestamp='1287000801' post='3619']
It would also be nice to know at which distance the lens can become a real 300 mm, assuming it is short of infinity.
[/quote]
It'll be 300 at infinity... unless of course, the actual focal length at the tele end is like 299mm or something <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' /> The question is how wide does the tele-end get at close distances.GTW