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#11
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"Tony Polson" a écrit dans le message de ... "jean" wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? This only proves one thing: that if the comparator is dumbed-down shots for web use, it doesn't matter which lens you use. They are all bad enough. ;-) ? I should have shot raw? I can try it again with 4 lenses this time and more colors in the picture. Jean |
#12
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jean wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? Jean PS These are all TIFF files and at about 4Mb each so a broadband connection is better for download. There is no EXIF to make sure no one cheats (unless I missed something embedded in the files which is quite possible) Autofocus, or manually focused, with good eyesight? If autofocus, forget comparisons. Colin D. |
#13
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"jean" wrote in message ... "Tony Polson" a écrit dans le message de ... "jean" wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? This only proves one thing: that if the comparator is dumbed-down shots for web use, it doesn't matter which lens you use. They are all bad enough. ;-) ? I should have shot raw? I can try it again with 4 lenses this time and more colors in the picture. Jean You could also show a 100% crop of the same area in each image. Something with some backlighting in places would be a good way to see vingetting/ color fringing. |
#14
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jean wrote:
20% You got one right! This is the other problem with the test: since only you know the answers, you can (if you wish) simply make it up as you go along. Who can tell? You may wish to publish a hash of the results prior to revealing the 'answer', though this can't remove all doubt. |
#15
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On Fri, 26 Aug 2005 11:16:07 +1200, Colin D
wrote: jean wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? Jean PS These are all TIFF files and at about 4Mb each so a broadband connection is better for download. There is no EXIF to make sure no one cheats (unless I missed something embedded in the files which is quite possible) Autofocus, or manually focused, with good eyesight? If autofocus, forget comparisons. Colin D. Does that mean autofocus is erratic or never accurate? -Rich "Bittorrents are REFUNDS for all the BAD movie products Hollywood never gave us refunds for in the past" |
#16
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On Thu, 25 Aug 2005 18:39:48 -0400, "jean" wrote:
"Tony Polson" a écrit dans le message de .. . "jean" wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? This only proves one thing: that if the comparator is dumbed-down shots for web use, it doesn't matter which lens you use. They are all bad enough. ;-) ? I should have shot raw? I can try it again with 4 lenses this time and more colors in the picture. Jean It won't matter what you do, if the results don't agree with the Canon cranks preconceived opinions, they won't buy it. It's just outragious to suggest that you have to shoot RAW to make a comparision when dealing with full sized images. Unless Canon's JPEG conversion is so terrible, and there is some evidence it is. The sad fact is, apart from maybe 2 or 3 lenses, Canon products do not measure up to the best from Nikon or Olympus. Canon does not produce lenses to be ultimate image makers, because the main users of their high quality products are people like sports photogs and they definitely do not need top quality. They need speed (f-ratios and focusing) and a good range of focal lengths. And THAT is who Canon produces equipment for. -Rich "Bittorrents are REFUNDS for all the BAD movie products Hollywood never gave us refunds for in the past" |
#17
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"chris" a écrit dans le message de ... David A wrote: "jean" wrote in message ... I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? Jean PS These are all TIFF files and at about 4Mb each so a broadband connection is better for download. There is no EXIF to make sure no one cheats (unless I missed something embedded in the files which is quite possible) Jean, Is this a good test? .JPG being the great web equalizer. Print might show stuff worth looking at. The quality of the Kit lens isn't tested (hardly) in this picture. Niether are any of the other lens. If you really want to test these lens, shoot my daughters basketball games. Low light action no flash. The only lens that has a chance is the 50mm f1.8, but its a prime so your composition choices will suck. The 24-70 f2.8 L might have a chance if it has IS and its on a tripod. I agree, the kit lens is sufficient for a lot of things, your test shows it. But it tests *web .jpg's* and this isn't a very demanding environment. It's like web jpg's are a static picture of a car, and you took a picture of 64 Bronco, 69 Mach One, 2005 Boss and a Ferrari (any year) and said "see, which one is faster" You can't tell from the static picture. The Bronco would kick on the off road, the Ferrari would kick on back roads, the Boss on... well lots of things and the Mach One would kick at an old timers 1/4 mile retreat and car show circuit scene. DA. If you don't see the faults in full size JPEG, you won't see it in print. If you compare the print to the screen, you'd notice that the screen has more vibrant color. This is _not_ a test of the printer, so on screen JPEG in original size is fine for comparison. And why do you want to test how fast a lens can capture your daughter's basket game? This is a lens quality test, not a test of how wide or expensive the lens is. There is indeed one problem with the test, why choose f/8 and f/16? It should be at the lens widest aperture and also one taken at the common aperture of all the lenses, possibly f/5.6. The slow lenses are wide open at f5,6, in order to give them half a chance, I closed them down a bit and closed all the others to the same aperture to have the same depth of field on all lenses so that would not be a factor. Jean |
#18
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"RichA" a écrit dans le message de ... On Thu, 25 Aug 2005 18:39:48 -0400, "jean" wrote: "Tony Polson" a écrit dans le message de .. . "jean" wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? This only proves one thing: that if the comparator is dumbed-down shots for web use, it doesn't matter which lens you use. They are all bad enough. ;-) ? I should have shot raw? I can try it again with 4 lenses this time and more colors in the picture. Jean It won't matter what you do, if the results don't agree with the Canon cranks preconceived opinions, they won't buy it. It's just outragious to suggest that you have to shoot RAW to make a comparision when dealing with full sized images. Unless Canon's JPEG conversion is so terrible, and there is some evidence it is. The sad fact is, apart from maybe 2 or 3 lenses, Canon products do not measure up to the best from Nikon or Olympus. Canon does not produce lenses to be ultimate image makers, because the main users of their high quality products are people like sports photogs and they definitely do not need top quality. They need speed (f-ratios and focusing) and a good range of focal lengths. And THAT is who Canon produces equipment for. -Rich And to me too, I like my Canon stuff. I don't have a Nikon so I can't say which is better or if it is better. Jean "Bittorrents are REFUNDS for all the BAD movie products Hollywood never gave us refunds for in the past" |
#19
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You can doubt my honesty if you want, but why should I fudge the results? I
have nothing to gain or to lose. Since I don't want to drag this on for months, I can tell you right off that the only person bold enough to venture a guess had lens 4 right. Jean a écrit dans le message de ups.com... jean wrote: 20% You got one right! This is the other problem with the test: since only you know the answers, you can (if you wish) simply make it up as you go along. Who can tell? You may wish to publish a hash of the results prior to revealing the 'answer', though this can't remove all doubt. |
#20
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"Dirty Harry" a écrit dans le message de news:wvsPe.306559$5V4.230960@pd7tw3no... "jean" wrote in message ... "Tony Polson" a écrit dans le message de ... "jean" wrote: I have taken 2 pictures, one at f8 and the other at f16 with the following lenses: Canon EFs 18-55 f4,5-5,6 ("kit" lens modified to fit on a 10D) Canon EF 50mm f1,8 Canon EF 24-85 f3,5-4,5 Canon EF 35-80 f4-5,6 Canon EF 24-70 f2,8 L So we have 4 zooms, 3 plastic cheapie lenses, one middle of the road zoom and a primo pro lens. The "kit" lens is one of the early ones which came with my Drebel, the newer ones are said to be better. I tried to put all lenses at 50mm and not move the tripod but there are still some slight changes from one lens to the other. The pictures are at http://www.pbase.com/jeandr/50mm_test Now which is which? This only proves one thing: that if the comparator is dumbed-down shots for web use, it doesn't matter which lens you use. They are all bad enough. ;-) ? I should have shot raw? I can try it again with 4 lenses this time and more colors in the picture. Jean You could also show a 100% crop of the same area in each image. Something with some backlighting in places would be a good way to see vingetting/ color fringing. Noted. Jean |
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