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#1
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Canon EF & EF-S lenses
What are canon EF-S lenses? What is the difference between EF-S & EF lenses?
Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? |
#2
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Canon EF & EF-S lenses
wrote in message
... What are canon EF-S lenses? What is the difference between EF-S & EF lenses? Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? Not just optimized, but there's a mechanical difference such that EF-S can't be mounted on EF-only bodies (at least not without modifying the lens mount). EF lenses can be used on both EF & EF-S mount cameras. Mark |
#3
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Canon EF & EF-S lenses
On Sat, 12 Nov 2005 23:48:01 -0500, wrote:
What are canon EF-S lenses? What is the difference between EF-S & EF lenses? Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? It may be also that the EF-S is optimized for the manufacturer, the optics are cheaper to build for smaller "negative". I am not particularly pleased of the fact that Canon has different lens/bodytypes that can't be used mixed. |
#4
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Canon EF & EF-S lenses
Hannu writes:
I am not particularly pleased of the fact that Canon has different lens/bodytypes that can't be used mixed. All EF lenses can be used on all EOS bodies. EF-S lenses can be used only on bodies with APS-C size sensor. If you want maximum compatibility, just don't buy the EF-S lenses. The L lenses are all EF mount, so you won't be sacrificing any quality. -- Måns Rullgård |
#5
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Canon EF & EF-S lenses
"John A. Stovall" wrote in message
... On Sun, 13 Nov 2005 00:05:33 -0500, "Mark B." wrote: wrote in message om... What are canon EF-S lenses? What is the difference between EF-S & EF lenses? Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? Not just optimized, but there's a mechanical difference such that EF-S can't be mounted on EF-only bodies (at least not without modifying the lens mount). EF lenses can be used on both EF & EF-S mount cameras. The EF-S just have a smaller image circle if you call that "optimized." If you used one on an EF body with a full frame sensor you would see serious vignetting. If you didn't damage the mirror before an image was produced. The rear element of the EF-S lenses protrudes into the mirror box more than the standard EF lenses do, thus precluding them from being used on FF bodies. The rear element casing can be filed down (!) to clear the smaller mirror of the earlier 1.6x crop cameras, apparently, but probably not the much larger mirror of the 5D/1D/1Ds. -- Skip Middleton http://www.shadowcatcherimagery.com |
#6
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Canon EF & EF-S lenses
In message ,
John A. Stovall wrote: Simple solution don't buy EF-S lenses and plan to go to a 5D on 1D body. But what do you substitute the 10-22 EF-S or 17-85 IS EF-S with? The 10-22 with a 1.6x crop is better in the corners than the 16-35L on a FF. The 28-135 IS not a stellar lens; it's only quality is its IS. -- John P Sheehy |
#7
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Canon EF & EF-S lenses
"John A. Stovall" wrote in message
... On Sun, 13 Nov 2005 06:41:48 -0800, "Skip M" wrote: "John A. Stovall" wrote in message . .. On Sun, 13 Nov 2005 00:05:33 -0500, "Mark B." wrote: wrote in message .com... What are canon EF-S lenses? What is the difference between EF-S & EF lenses? Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? Not just optimized, but there's a mechanical difference such that EF-S can't be mounted on EF-only bodies (at least not without modifying the lens mount). EF lenses can be used on both EF & EF-S mount cameras. The EF-S just have a smaller image circle if you call that "optimized." If you used one on an EF body with a full frame sensor you would see serious vignetting. If you didn't damage the mirror before an image was produced. The rear element of the EF-S lenses protrudes into the mirror box more than the standard EF lenses do, thus precluding them from being used on FF bodies. The rear element casing can be filed down (!) to clear the smaller mirror of the earlier 1.6x crop cameras, apparently, but probably not the much larger mirror of the 5D/1D/1Ds. Actual you can cut the mirror down on the 5D and 1D. This is done to allow it to use the great Leica WA's. No one would bother to do this to use an EF-S lenses but for a Leica it's worth it. Here's the mod. http://www.fredmiranda.com/forum/topic/296693 Ewww, that would make me really nervous. And what would it do to the image in the viewfinder? I'm not sure any lens is worth sacrificing ability to compose an image... -- Skip Middleton http://www.shadowcatcherimagery.com |
#8
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Canon EF & EF-S lenses
wrote in message ... In message , John A. Stovall wrote: Simple solution don't buy EF-S lenses and plan to go to a 5D on 1D body. But what do you substitute the 10-22 EF-S or 17-85 IS EF-S with? The 10-22 with a 1.6x crop is better in the corners than the 16-35L on a FF. The 28-135 IS not a stellar lens; it's only quality is its IS. -- The 17-85 and 28-135 are roughly on the same level, optically, from all reports. And the 16-35 stopped down to the f3.5 that the 10-22 starts at starts to look a little better in the corners. And the 10-22 really sucks at f2.8... ;-) -- Skip Middleton http://www.shadowcatcherimagery.com |
#9
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Canon EF & EF-S lenses
Skip M wrote:
wrote in message ... In message , John A. Stovall wrote: Simple solution don't buy EF-S lenses and plan to go to a 5D on 1D body. But what do you substitute the 10-22 EF-S or 17-85 IS EF-S with? The 10-22 with a 1.6x crop is better in the corners than the 16-35L on a FF. The 28-135 IS not a stellar lens; it's only quality is its IS. -- The 17-85 and 28-135 are roughly on the same level, optically, from all reports. And the 16-35 stopped down to the f3.5 that the 10-22 starts at starts to look a little better in the corners. And the 10-22 really sucks at f2.8... ;-) Prove it? |
#10
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Canon EF & EF-S lenses
Skip M wrote:
"John A. Stovall" wrote in message ... On Sun, 13 Nov 2005 06:41:48 -0800, "Skip M" wrote: "John A. Stovall" wrote in message ... On Sun, 13 Nov 2005 00:05:33 -0500, "Mark B." wrote: wrote in message l.com... What are canon EF-S lenses? What is the difference between EF-S & EF lenses? Are EF-S optimized for digital cameras, to take into account the 1.6x conversion factor on small-framed sensors? Not just optimized, but there's a mechanical difference such that EF-S can't be mounted on EF-only bodies (at least not without modifying the lens mount). EF lenses can be used on both EF & EF-S mount cameras. The EF-S just have a smaller image circle if you call that "optimized." If you used one on an EF body with a full frame sensor you would see serious vignetting. If you didn't damage the mirror before an image was produced. The rear element of the EF-S lenses protrudes into the mirror box more than the standard EF lenses do, thus precluding them from being used on FF bodies. The rear element casing can be filed down (!) to clear the smaller mirror of the earlier 1.6x crop cameras, apparently, but probably not the much larger mirror of the 5D/1D/1Ds. Actual you can cut the mirror down on the 5D and 1D. This is done to allow it to use the great Leica WA's. No one would bother to do this to use an EF-S lenses but for a Leica it's worth it. Here's the mod. http://www.fredmiranda.com/forum/topic/296693 Ewww, that would make me really nervous. And what would it do to the image in the viewfinder? I'm not sure any lens is worth sacrificing ability to compose an image... If a smaller mirror is needed, why not just use non-reflective tape instead of dremelling the thing? _____ Slack |
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