The New Canon EF-S 24mm f/2.8 STM Pancake

notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Depends on what the image circle produced by the lens really is
 
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notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

That is correct. The focal length displayed on the lens is because it is the LENS that is 24mm no matter what sensor you place behind it. Even if it's made for crop like a 10-22 ef-s the filed of view is still equiv to 16-35,2mm on FF.
 
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notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.
 
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RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.

A Canon EF-S lens will not mount on a Canon FF body.
 
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Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.

A Canon EF-S lens will not mount on a Canon FF body.

Can you tell me why? If u can mount FF lens on a crop body?
 
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RunTillYouPuke said:
Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.

A Canon EF-S lens will not mount on a Canon FF body.

Can you tell me why? If u can mount FF lens on a crop body?

because the ef-S has a Short back focus distance. That is, the rear element protrudes farther into the camera body, and a FF mirror would hit it. The smaller APS-C mirror doesn't need as much room to swing up. So Canon devised a trick with the mounts so that FF-compatible lenses can mount to the EF-S mount, but not vice versa.
 
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RunTillYouPuke said:
Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm
No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.
Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.
Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.
A Canon EF-S lens will not mount on a Canon FF body.
Can you tell me why? If u can mount FF lens on a crop body?
The EF-S mount is purposely different, because Canon wants to be incompatible. Moreover, the lenses Sigma "DC" fit in the full frame cameras, even if they theoretically may not be compatible.
 
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bseitz234 said:
RunTillYouPuke said:
Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.

A Canon EF-S lens will not mount on a Canon FF body.

Can you tell me why? If u can mount FF lens on a crop body?

because the ef-S has a Short back focus distance. That is, the rear element protrudes farther into the camera body, and a FF mirror would hit it. The smaller APS-C mirror doesn't need as much room to swing up. So Canon devised a trick with the mounts so that FF-compatible lenses can mount to the EF-S mount, but not vice versa.

Thx for explanation. :) So it looks like I was wrong on this one.
 
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ajfotofilmagem said:
RunTillYouPuke said:
Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm
No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.
Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.
Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.
A Canon EF-S lens will not mount on a Canon FF body.
Can you tell me why? If u can mount FF lens on a crop body?
The EF-S mount is purposely different, because Canon wants to be incompatible. Moreover, the lenses Sigma "DC" fit in the full frame cameras, even if they theoretically may not be compatible.

Yes, but they are not fully compatible and usually requires zooming from the shortest focal and back from the longest to work, so I think it's better to just make them not compatible ...
 
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bseitz234 said:
RunTillYouPuke said:
Etienne said:
RunTillYouPuke said:
notsosem said:
RunTillYouPuke said:
dolina said:
25mm x 1.6x = 40mm

No. It's EF-S so it's 24mm on APS-C. If you put EF 24mm on APS-C, then you will get equivalent around 38mm.

Uh. I'm almost sure that an ef 24 has the same FOV as an ef-s 24. The added "S" just means that it's only mountable to crop bodies.

Nope. You can mount EF-S lens on FF as well. But I wouldn't recommend it.

A Canon EF-S lens will not mount on a Canon FF body.

Can you tell me why? If u can mount FF lens on a crop body?

because the ef-S has a Short back focus distance. That is, the rear element protrudes farther into the camera body, and a FF mirror would hit it. The smaller APS-C mirror doesn't need as much room to swing up. So Canon devised a trick with the mounts so that FF-compatible lenses can mount to the EF-S mount, but not vice versa.

Exactly ... I think there's some sort of design advantage to pushing the rear element back. Maybe it allows for smaller lenses?

Other manufacturers that make crop lense for Canon bodies, like Tokina, Sigma, Tamron, use the EF mount. These crop lenses can be mounted on the FF bodies, and many people do. I have the Tokina 11-16 f/2.8 and the Tokina 50-135 f/2.8, both crop lenses. I have used them on my 5DIII. The 11-16 works fine above 15mm, and the 50-135 works from about 100-135mm.
 
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Well I'm gonna have fun with this little guy. I do use the 40mm as a lens cap, just a bit long though, allows me to carry a ready to go camera in a narrow unobtrusive bag. The intro price will be interesting I understand initial pricing thing but can it really be that far away from the current 40mm. OK so I wait six months no big deal, then again even at full price it's still tempting ::)
 
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The only reason I could think of for this lens being f/2.8 not f/2, is to not let it compete directly with the 22mm f/2 M lens. If so, then this may mean that Canon aren't giving up on the M system yet.

Yet, I consider it a very nice move from Canon. With this lens, the 40mm pancake, and the nifty fifty, SL1 and Rebel users now have a light weight prime holy trinity of their own.
 
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