EF vs EF-S?

Babicz · 30th of June 2012 (Sat)

Difference between EF and EF-S on a crop body? I understand EF is compatible with full and crop frame, and EF-S is exclusively for crop bodies.

Is there a magnification factor if when using an EF lens on a crop vs an EF-S? Or is the only difference the compatibility

kin2son · 30th of June 2012 (Sat)

Quote:

Originally Posted by Babicz

Is there a magnification factor if when using an EF lens on a crop vs an EF-S?

There is no diff. EF and EF-S lens will look exactly the same on a crop camera.

Babicz · 30th of June 2012 (Sat)

Quote:

Originally Posted by kin2son

There is no diff. EF and EF-S lens will look exactly the same on a crop camera.

THANK YOU.

seoul4korea · 30th of June 2012 (Sat)

The only real good thing about having a EF lens on a crop body is that it's you use the sharpest part of the lens (more of the center) so corner sharpness may not be an issue.... The same with vignetting as well. With my 16-35 II (82mm threads) I can hand hold a 77mm filter on the inside of the lens and not see vignetting.

Babicz · 30th of June 2012 (Sat)

Quote:

Originally Posted by seoul4korea

The only real good thing about having a EF lens on a crop body is that it's you use the sharpest part of the lens (more of the center) so corner sharpness may not be an issue.... The same with vignetting as well. With my 16-35 II (82mm threads) I can hand hold a 77mm filter on the inside of the lens and not see vignetting.

Good point, I didn't think about this. I'm deciding on 50 1.4 or a standard zoom lens to upgrade from kit.

amfoto1 · 1st of July 2012 (Sun)

EF lenses are designed for full frame, but work on crop cameras just fine. EF-S lenses are designed specifially for crop cameras and in some cases might be smaller, lighter and less expensive. So, in a sense, using a crop camera you actually have a wider choice of lenses, and might not have to spend as much to put together a nice kit, which might be easier to carry around.

Keep in mind that on an old film camera or a modern full frame DSLR, a 50mm lens was or is a "standard" or "normal" lens. However, the exact same 50mm lens used on a crop camera acts as a short telephoto, makes for a nice portrait lens. (50mm is still 50mm, it just "behaves" differently.)

Tell us more about what you have now and what you are trying to do, and we might be able to better advise on your choices.

xarqi · 1st of July 2012 (Sun)

Quote:

Originally Posted by Babicz

Good point, I didn't think about this. I'm deciding on 50 1.4 or a standard zoom lens to upgrade from kit.

To echo Alan's query: what are you hoping to achieve?

Owain Glyndwr · 1st of July 2012 (Sun)

Quote:

Originally Posted by amfoto1

EF lenses are designed for full frame, but work on crop cameras just fine. EF-S lenses are designed specifially for crop cameras and in some cases might be smaller, lighter and less expensive. So, in a sense, using a crop camera you actually have a wider choice of lenses, and might not have to spend as much to put together a nice kit, which might be easier to carry around.

Keep in mind that on an old film camera or a modern full frame DSLR, a 50mm lens was or is a "standard" or "normal" lens. However, the exact same 50mm lens used on a crop camera acts as a short telephoto, makes for a nice portrait lens. (50mm is still 50mm, it just "behaves" differently.)

Tell us more about what you have now and what you are trying to do, and we might be able to better advise on your choices.

not sure i like the word "behave" since the difference is not from the lens but the sensor on the camera. a 50mm on a crop gives the equivalent fov to 80mm on a FF due to the smaller sensor in the camera. A 30mm lens on a crop gives the same fov as a 50mm on a FF. For someone who only has a crop (like me) working out ff equivalents is of limited value. If i see a photo i like and would like to try something similar it is important to know if the lens used was on a FF or a crop but beyond that, the crop factor is fairly irrelevant.

xarqi · 1st of July 2012 (Sun)

Quote:

Originally Posted by Owain Glyndwr

not sure i like the word "behave"...

Nor, I suspect, does Alan. That is why he put it in quotation marks, to signify that it was being used in a non-standard way. Of course the lens behaves no differently when mounted on cameras with different sized sensors, but it may appear to, in exactly the way he went on to describe.

ScubaDude · 2nd of July 2012 (Mon)

Quote:

Originally Posted by Babicz

Good point, I didn't think about this. I'm deciding on 50 1.4 or a standard zoom lens to upgrade from kit.

Actually, that's not true. Each photosite in the sensor receives light from every point on the lens. You're not just using the center portion of the lens.

xarqi · 2nd of July 2012 (Mon)

Quote:

Originally Posted by ScubaDude

Actually, that's not true. Each photosite in the sensor receives light from every point on the lens. You're not just using the center portion of the lens.

OK - so substitute "image circle" for "lens", and the argument is valid even if the terminology isn't quite right.

SkipD · 2nd of July 2012 (Mon)

Quote:

Originally Posted by ScubaDude

Actually, that's not true. Each photosite in the sensor receives light from every point on the lens. You're not just using the center portion of the lens.

Quote:

Originally Posted by xarqi

OK - so substitute "image circle" for "lens", and the argument is valid even if the terminology isn't quite right.

The true statement would be:

Actually, that's not true. Each photosite in the sensor receives light from every point on the lens. You're just using the center portion of the image circle.

The first use of the word "lens" is proper.

PS - I also removed the "not" that others noted being incorrect after my original post here.

JohnB57 · 2nd of July 2012 (Mon)

I found that confusing as there seems to be a "not" in the wrong place - unless I'm being very stupid or very pedantic.

Each photosite in the sensor receives light from every point on the lens. You are just not using the centre portion of the image circle.

Is that correct?

Owain Glyndwr · 2nd of July 2012 (Mon)

Quote:

Originally Posted by JohnB57

I found that confusing as there seems to be a "not" in the wrong place - unless I'm being very stupid or very pedantic.

Each photosite in the sensor receives light from every point on the lens. You are just not using the centre portion of the image circle.

Is that correct?

the way it was written sounds more logical. Your suggestion doesn't make sense to me.

JohnB57 · 2nd of July 2012 (Mon)

Quote:

Originally Posted by Owain Glyndwr

the way it was written sounds more logical. Your suggestion doesn't make sense to me.

So a crop sensor doesn't "just use the centre portion of the image circle"? That's counter intuitive but I'm prepared to be wrong.

*edit* you're right - I mis-edited and it makes no sense.

My version should have read "You are just not using the outer portion of the image circle."

BS baffles brains eh?

30th of June 2012 (Sat)	#1
Babicz Junior Member Join Date: Jun 2012 Location: San Francisco Posts: 25	EF vs EF-S? Difference between EF and EF-S on a crop body? I understand EF is compatible with full and crop frame, and EF-S is exclusively for crop bodies. Is there a magnification factor if when using an EF lens on a crop vs an EF-S? Or is the only difference the compatibility

30th of June 2012 (Sat)	#4
seoul4korea Goldmember Join Date: Aug 2009 Location: Panama city, Fl Posts: 2,128	Re: EF vs EF-S? The only real good thing about having a EF lens on a crop body is that it's you use the sharpest part of the lens (more of the center) so corner sharpness may not be an issue.... The same with vignetting as well. With my 16-35 II (82mm threads) I can hand hold a 77mm filter on the inside of the lens and not see vignetting. __________________ Gear List \| Feed Back \| My Site YN RF-603 O-ring solution

1st of July 2012 (Sun)	#6
amfoto1 Cream of the Crop Join Date: Aug 2007 Location: San Jose, California Posts: 8,782	Re: EF vs EF-S? EF lenses are designed for full frame, but work on crop cameras just fine. EF-S lenses are designed specifially for crop cameras and in some cases might be smaller, lighter and less expensive. So, in a sense, using a crop camera you actually have a wider choice of lenses, and might not have to spend as much to put together a nice kit, which might be easier to carry around. Keep in mind that on an old film camera or a modern full frame DSLR, a 50mm lens was or is a "standard" or "normal" lens. However, the exact same 50mm lens used on a crop camera acts as a short telephoto, makes for a nice portrait lens. (50mm is still 50mm, it just "behaves" differently.) Tell us more about what you have now and what you are trying to do, and we might be able to better advise on your choices. __________________ Alan Myers "Walk softly and carry a big lens." GEAR: 5DII, 7D(x2), 50D(x3), some other cameras, a bunch of lenses & accessories - FLICKR - PRINTROOM

2nd of July 2012 (Mon)	#13
JohnB57 Senior Member Join Date: Jul 2010 Location: Holmfirth, Yorkshire, England Posts: 1,224 IMAGE EDITING OK	Re: EF vs EF-S? I found that confusing as there seems to be a "not" in the wrong place - unless I'm being very stupid or very pedantic. Each photosite in the sensor receives light from every point on the lens. You are just not* using the centre portion of the image circle.* Is that correct?

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