Scott Stoness Online Upload & Sell: On
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Pixel Perfect wrote:
The reason I bought it up was that plenty of people here have explicitly stated they bought the 17 rather than the 24 because they could just use the TC on the 17 if they needed longer FL and that IQ was excellent. If these tests are to be believed there's a large gap in performance. It's appreciably worse than the 24 TS-E + 1.4 and while comparable to the 24-105L it's still a bit behind in IQ and the 24-105L is not the gold standard by any stretch. Interestingly the 17 + 1.4 is not quite as good as the older 24 TS-E mk I either. Even more bizarrely, the 1.4x II works better than the 1.4x III on the 17! mk II has a little more distortion but is clearly sharper.
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I think you are right but the gap is not that large and the tradeoff is acceptable
The 24-105 at 24/f8 is very good. Where it is also weak is at 24mm/ f4 and with barrel distortion at this setting.
And similarly the TS17 with 1.4x is very good (=excellent - is a judgement) at 24/f8. The 24ts is better but the 24ts is better than all lens at this level including the 24-70 v2. The ts17/1.4 f8 is almost as good as the 24-70 v2 f8. And is pretty close to 24-105 or 16-35 at f8 with less barrel distortion.
So you are right that people should understand that that using the 1.4x on the 17 does decrease the iq. And that TS24 itself is sharper than the 17TS without the 1.4 to start with. So the iq does got down compared to the TS24, particularly at wide open, but it is very good and has less geometric distortion than most 24mm lens. Sometimes versatility outweighs iq.
And if I had to choose one lens of the TS17 or TS24, I would get the TS17 because:
1) There are lots of good 24mm lens out there that are pretty good.
2) There is only one TS17
3) The TS17 can be 11mm, 17mm, 24mm or 28mm with really good results whereas the 24 cannot
4) Shifting is more critical at 17mm than 24mm because you are likely to be less close to foreground items.
Edited on Oct 23, 2013 at 06:08 PM · View previous versions
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