L lens on crop sensor body


Sep 27, 2013
4
0
0
Choa Chu Kang
#1
Can the canon 17-40mm wide angle L lens be used on a crop sensor body of 550D? Some people recommend against it.
 

thoongeng

Senior Member
Jan 26, 2010
1,246
15
38
#3
sure can, why not?

Just that it's 'ultra-wide' angle on full frame becomes (not-so-)'wide' on crop sensor
 

eleveninth

Senior Member
Jan 17, 2006
6,217
2
38
#4
why not. Unless you need the ultra wide and don't intend to switch to ff then get the 10 - 22 or tokina 11 - 16 or other alternatives.
 

Rashkae

Senior Member
Nov 28, 2005
19,105
12
0
#5
You will need to apply the 1.6x focal length multiplier
 

ahsim

Senior Member
Feb 25, 2008
1,001
1
38
#6
For around the same price you can get a 17-55mm which offers IS and a max f2.8 aperture and longer reach.

Guess that's why people don't recommend the L lens?
 

Blur Shadow

Senior Member
Sep 17, 2005
4,886
4
0
#7
Can the canon 17-40mm wide angle L lens be used on a crop sensor body of 550D? Some people recommend against it.
1. Yes, it can work on the Canon 550D.

2. I usually do not recommend the lens because it is optically inferior, and in my opinion, unbefitting of its "L lens" status. I'd be happier with a Tamron or Sigma 17-50mm, the latter providing you with OS. The Canon 17-55mm f/2.8L IS is another strong contender.
 

Jun 4, 2012
277
1
18
32
Jurong West
#8
Azhar Aziz, the reason why people don't recommend it is because of the crop factor.
So if you were to get 17-40, on your 550D it will became 27 - 64.
Get the EF-S 10-22 if you wanna use on your crop body, EF-S 10-22 is also a good wide angle lens which you can consider.
 

Octarine

Moderator
Staff member
Jan 3, 2008
12,491
26
48
Pasir Ris
#9
Can the canon 17-40mm wide angle L lens be used on a crop sensor body of 550D? Some people recommend against it.
Ask these people why they recommend against it. Either you will learn something about lenses and camera, or you will learn something about these 'some people' :bsmilie:
 

photoart

Senior Member
Feb 21, 2009
2,601
1
38
Singapore
www.facebook.com
#11
2. I usually do not recommend the lens because it is optically inferior, and in my opinion, unbefitting of its "L lens" status. I'd be happier with a Tamron or Sigma 17-50mm, the latter providing you with OS. The Canon 17-55mm f/2.8L IS is another strong contender.

Totally agree :thumbsup:

I have tried the tamron 17-50mm non-vc, and it's a superb lens for its price.

If you need something wider, you can consider the tokina 11-16mm. I sold the canon 17-40L for the tokina 11-16, mainly for the f2.8 aperture and the better IQ
 

pinholecam

Moderator
Staff member
Jul 23, 2007
10,932
85
48
#12
There are other cheaper and good options over the 17-40L on aps-c.

The lens provides a good range of focal lengths at a pretty fast f4 on FF. (UWA to a wide 'normal')
17mm is already very wide on FF. (need about a 11mm lens on aps-c)
But on aps-c, this is wasted due to the crop factor and its fov coverage becomes close to that of a kit 18-55 kit lens.
As mentioned by others, there are cheaper/faster options like Sigma/Tamron 18-50/17-50 f2.8 for aps-c.
For wider angles, you'd need to use a UWA like a 10-20, 8-16 or 12-24 too. (totally unlike the versatility of the 17-40 on FF )

So its not that its no good on aps-c, but that there are other options.
If you don't mind getting one and maybe will get a FF camera in the future, then its up for consideration too.
 

Last edited:

Edwin Francis

Senior Member
Mar 24, 2006
880
3
18
www.sgwriter.com
#13
Perhaps those mysterious 'people' were recommending against buying a FF lens for a crop-sensor body i.e. wasting money on coverage for a FF sensor that you're not using.
No reason you can't use it, but as many others have pointed out, there are more cost-effective options.
 

rhino123

Moderator
Staff member
Sep 1, 2006
5,243
15
38
NA
#15
Technically all EF and EF-S mount lenses (it can be from native company like Canon itself or third party manufacturer like Tokina, Sigma and Tamron) can be mounted onto a Canon DSLR (be it cropped sensor or FF). So there really is nothing wrong to put L lens to crop sensor camera like the 550D.

Reason for not recommending the 17-40mm might be as what everyone had mentioned or simply someone out there find that it is not worth to spend so much on a lens that was designed for full frame camera to be attached to a crop sensor camera when actually there are extremely good lenses that are designed specifically for crop sensor camera like the famed Canon 17-55mm, Tamron 17-50mm (both VC and non-VC), Sigma 17-50mm OS and soon Sigma 18-35mm f1.8.
 

Mythmaker

New Member
Oct 8, 2011
1,011
2
0
Buangkok MRT
#17
You can use it, but you won't be able to tap into the entire potential.

It will not be as sharp as mounting it on a full frame.

Like others stated, for the same price you can get a lens that's made for crops. They will be cheaper, sharper, and probably better.
 

Last edited:

user12343

Senior Member
May 15, 2005
1,032
2
38
#19
It is generally true when an EF lens used on a crop body yields less sharpness in terms of resolving power on MTF charts compared to a FF body as seen in here
 

Last edited:

Octarine

Moderator
Staff member
Jan 3, 2008
12,491
26
48
Pasir Ris
#20
It is generally true when an EF lens used on a crop body yields less sharpness in terms of resolving power on MTF charts compared to a FF body as seen in here
Maybe it's just because the lens sits closer to the sensor..? What is the difference between a lens on 50D and 5D? Correct, it's a lens ...
But then, what's the point of all this resolution talk? Does anybody lose money when using an EF lens on APS-C body? On the contrary, check the distortion results and vignetting of any L lens when mounted on crop body and you will see why it makes perfect sens to use a FF lens on a crop body.
 

Top Bottom