Canon 28 1.8

[bdunbar79]

The real question is this: Why has Canon left crop users in the cold by not releasing a "normal" prime in an ef-s mount?  Buying an ef 24, 28, or 35mm lens to substitute a "normal" on a crop body is stupid.  You'll have a close to normal focal length, but you'll have a wide angle perspective.

Fail.

The Canon EF-S 31.25mm f/2.8 

[RAKAMRAK]

The real question is this: Why has Canon left crop users in the cold by not releasing a "normal" prime in an ef-s mount?  Buying an ef 24, 28, or 35mm lens to substitute a "normal" on a crop body is stupid.  You'll have a close to normal focal length, but you'll have a wide angle perspective.

Fail.

I am not sure if I understand this correctly. What would constitute a "normal" prime in an EF-S mount? As I understand it would have to be in the 28-33mm focal length. That would give a "field of view" on APS-C close to what 45-50mm focal length gives on FF, but the focal length will still remain 28-33mm. Moreover, given that perspective is a function of focal length and not field of view (at least between FF and APS-C), the so called "normal EF-S" will still have a "wide angle" perspective. Is not that the case? Technically minded photogs please help to clarify my doubt.

[bdunbar79]

So you are saying an EF 30mm lens will be the same as an EF-S 30mm lens?

[RAKAMRAK]

So you are saying an EF 30mm lens will be the same as an EF-S 30mm lens?

The focal length will remain the same.

The image circle created at the image plane will be definitely small and as a result a smaller sized "field of view" will be captured at the image plane.

And as Canon builds them, the EF-S one cannot be mounted on an FF body (unlike some third party manufactureres).

Are you saying these are wrong? On top of that I need to clarify whether the perspective of a lens is a function of focal length or field of view?

[bdunbar79]

So you are saying an EF 30mm lens will be the same as an EF-S 30mm lens?

The focal length will remain the same.

The image circle created at the image plane will be definitely small and as a result a smaller sized "field of view" will be captured at the image plane.

And as Canon builds them, the EF-S one cannot be mounted on an FF body (unlike some third party manufactureres).

Are you saying these are wrong? On top of that I need to clarify whether the perspective of a lens is a function of focal length or field of view?

Please don't read more into my post than I posted.  It was a simple question and not a trick question at that.  Which part of my question made you infer that I was saying you were incorrect?  I believe all the guy wants is an EF-S lens with a FOV-equivalent of 50mm but with a smaller sized field of view capture at the image plane.  That seems like a simple request.  Why read so much more into it?  Will the two images taken result in the exact same view, one with an EF 30mm vs. EF-S 30mm lens?  I don't really know.

[RAKAMRAK]

I am sorry if from my RE: post it seemed that I took your post to be offensive. Not at all. I was just curious to know whether what I know about EF and EF-s (and focal length) is correct or not.

Coming to my original post, what I tried to mean is that even if canon comes out with a, say, EF-S 30mm, would not the perspective remain the same as that of EF 30mm on an APS-C? The EF-S will probably just "optimized" (smaller glass elements probably) for cropped sensor. Therefore, for us APS-C photogs, it won't make any difference (probably) whether canon brings out an EF 30mm or EF-S 30mm. With APS-C both will capture the exact same picutre (FOV equivalent to something close to 50mm). Is there any difference in the FOV of EF-S 17-55 f/2.8 set at 50mm on APS-C and EF 50mm (any of the three/four) on APS-C? I think not. But I do not have the 17-55 so cannot do the experiment right now. The request for EF-S 30mm is also similar I believe, EF 30mm will also serve the exact same purpose.

[bdunbar79]

I am sorry if from my RE: post it seemed that I took your post to be offensive. Not at all. I was just curious to know whether what I know about EF and EF-s (and focal length) is correct or not.

Coming to my original post, what I tried to mean is that even if canon comes out with a, say, EF-S 30mm, would not the perspective remain the same as that of EF 30mm on an APS-C? The EF-S will probably just "optimized" (smaller glass elements probably) for cropped sensor. Therefore, for us APS-C photogs, it won't make any difference (probably) whether canon brings out an EF 30mm or EF-S 30mm.

No no, your assessment is correct.  You're absolutely right.  Will Canon make an EF-S lens at that focal length?  No way.  Even if the photos were slightly different with the two lenses, it makes not a lick of difference in reality and therefore Canon will not make the lens.  When was the last release date for an EF-S lens?

[RAKAMRAK]

yeah true. The last "presentable" EF-S zoom was in 2009 and except for the 60mm macro there is not a single EF-S prime (probably does not make business sense either).

I wish may be someday canon will bring out EF-S 55-135/150mm f/2.8.

[bdunbar79]

yeah true. The last "presentable" EF-S zoom was in 2009 and except for the 60mm macro there is not a single EF-S prime (probably does not make business sense either).

I wish may be someday canon will bring out EF-S 55-135/150mm f/2.8.

That's actually excellent.  Now that you mention it, does someone have a 7D and a 60mm lens, and a FF camera with a 100mm lens.  Then we could do subtle comparisons regarding view and prespective.  That would be a great test (only an effective 4mm difference). 

[RAKAMRAK]

or even any APS-C zoom at 24/25mm on APS-C and new canon shorty forty on a full frame..

[bdunbar79]

Can you do the test?

[briansquibb]

Why would Canon make a new EF-S lens when they have shown that they can make a cheap and compact EF lens? As their direction is ff, the introduction of ef-s lens would send the wrong message to potential ff users

[Random Orbits]

yeah true. The last "presentable" EF-S zoom was in 2009 and except for the 60mm macro there is not a single EF-S prime (probably does not make business sense either).

I wish may be someday canon will bring out EF-S 55-135/150mm f/2.8.

I don't think a 55-150 would be that much lighter/smaller/cheaper than the already excellent and available 70-200s.  At 150mm and f/2.8, the effective aperture is already much larger than the sensor, so a smaller sensor does would not help reduce lens size.  Sigma came out with a 50-150mm F2.8 APO EX DC OS.  It weighs about 100g less than the Sigma 70-200mm f/2.8 APO EX DG HSM OS and costs only about 100 less (1200 vs. 1300 on Amazon).  If that is similar to what Canon could do, then I'd opt for the 70-200 instead because Sigma's 50-150 is for the crop camera only and the FF version is longer, weighs only about 0.25 lb more and is longer.

[BXL]

The real question is this: Why has Canon left crop users in the cold by not releasing a "normal" prime in an ef-s mount?  Buying an ef 24, 28, or 35mm lens to substitute a "normal" on a crop body is stupid.  You'll have a close to normal focal length, but you'll have a wide angle perspective.

Fail.

First of all, primes with an ef-mount work very well on APS-C cameras. The 50mm is a very nice portrait prime on a crop camera. Secondly, I would love special primes for aps-c, for example an ef-s 15mm f/2.8. The question is, how big is the market for such a prime?

[DJL329]

Stevo,

I've been using that lens for a few years now and love it; it's my go-to lens when I need something wider than 50mm.  Lens flare has not been a problem with it, though I sometimes remove the UV filter when shooting into the sun.  I included some sun shots to show how flare resistant it is.  I also have the original EF 14mm f/2.8L, so I know what a problem lens flare can be!  I especially like using it during Autumn, while hiking.

Like most wide-angle lenses, it's not good for portraits (the heads bulge out), but IMO the colors are very good.


http://www.flickr.com/photos/43086792@N03/7335203604/#


http://www.flickr.com/photos/43086792@N03/7335205586/#


http://www.flickr.com/photos/43086792@N03/7168092714/#


http://www.flickr.com/photos/43086792@N03/5055249807/#