arkturas Member  214 posts Likes: 1 Joined Jun 2006 Location: UK More info | Nov 03, 2006 16:33 | #1 I'm not one for pixel peeping - (This is the first time I've ever scrutinized the pixels...promise)
Gear: a camera and some lenses
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morehtml Goldmember  2,987 posts Likes: 1 Joined Aug 2005 Location: Murfreesboro, TN More info | Nov 03, 2006 16:43 | #2 It appears on the 17-40mm you are closer to the subject and that is showing more detail because you are closer. The pics aren't framed the same. ---------------
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Madweasel Cream of the Crop  6,224 posts Likes: 61 Joined Jun 2006 Location: Fareham, UK More info | Nov 03, 2006 16:44 | #3 Are you sure you've labelled the images correctly? In both cases the one labelled 40mm shows a larger image than the one labelled 50mm, which can only be true if you moved in closer with the zoom (and therefore are not conducting a controlled test). Mark.
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Nov 03, 2006 16:46 | #4 yes they are the right pics - if you download the image you can check the exif, but I agree it isn't a controlled test. - Gear: a camera and some lenses
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Nov 03, 2006 16:48 | #5 I think the 50mm might have been too far away from the subject Gear: a camera and some lenses
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aLFaDaRK Senior Member  751 posts Joined Oct 2006 More info | Nov 03, 2006 16:50 | #6 Were these taken from the same distance away? If not I'd say set the cam on a tripod and take a picture at 17mm, 40mm, and then 50mm, and see what the sharpness is like. Canon EOS 5D Mark III, Canon Speedlite 580EX II
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morehtml Goldmember 2,987 posts Likes: 1 Joined Aug 2005 Location: Murfreesboro, TN More info | Nov 03, 2006 17:03 | #7 aLFaDaRK wrote in post #2212558  Were these taken from the same distance away? If not I'd say set the cam on a tripod and take a picture at 17mm, 40mm, and then 50mm, and see what the sharpness is like. But I'd say that either the 50mm was slightly off focus, or the 17-40 is sharper just because it's an L lens, just a couple guesses. Yes put on a tripod and use the same camera settings then for the 50mm move away from the subject until you have the same framing as the 17-40 @40mm. ---------------
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KevC Goldmember  3,154 posts Joined Jan 2005 Location: to More info | Nov 03, 2006 18:17 | #8 Hm. Curious. 17-40L is supposed to be weaker at 40 than 17.... Too much gear...
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ScottE Goldmember 3,179 posts Likes: 3 Joined Oct 2004 Location: Kelowna, Canada More info | Nov 03, 2006 19:27 | #9 It is possible the plane of focus is not the same in the two pictures. With the 17-40 is appears that the prong of the top jack is in sharp focus. With the 50 it looks like the back of well is in sharper focus than the prong.
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drisley "What a Tool I am"  9,002 posts Likes: 108 Joined Nov 2002 More info | Nov 03, 2006 22:21 | #10 ScottE is correct EOS R6 Mark II - Sigma 50/1.4 Art - Sigma 14-24/2.8 Art - Canon EF 70-200/2.8L Mark III - Godox Xpro-C - Godox TT685C x2
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runninmann what the heck do I know?  More info | Nov 03, 2006 22:31 | #11 |
dsc_1972 Senior Member  458 posts Joined Oct 2006 Location: Edinburgh, UK More info | Nov 03, 2006 22:46 | #12 Different focal length, different distance to subject... hmmm I wonder...<rolls eyes> Dave
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