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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 05 Oct 2013 (Saturday) 17:35
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DC Lens on 1D body?

 
J.A ­ Blix
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Oct 05, 2013 17:35 |  #1

hey guys.

ive heard before that Sigmas DC lenses wont fit on the 1D bodys, but i tried the Sigma 10mm 2.8 DC on my 1D III, and it works fine. Are they suposed to fit or what?

// Blix


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amfoto1
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Oct 05, 2013 18:13 |  #2

Sigma and all other modern third party lenses for Canon that I'm aware of simply use the EF lens mount, which is compatible with any EOS camera model. Third party manufacturers don't bother with the EF-S mount that Canon themselves use, to prevent the lens from even attaching to the camera. (Just as Nikon doesn't bother having a special mount for their crop only lenses and cameras, simply designates them DX and FX, and leaves it up to people to use them properly. In fact, some Nikon FF cameras detect when a lens is "crop only" and switch to taking cropped images to match the lens.)

While this allows the the third party lens to be attached to the camera, it doesn't mean it will work properly. Sigma designates their full frame lenses "DG" and their crop only (APS-C) lenses "DC". A "crop only" lens on a full frame camera will vignette heavily. It doesn't have a large enough image circle to cover the FF sensor.

Now, 1D series cameras are APS-H, which is in between full frame and APS-C. So the vignetting will probably still occur but likely will be less.

There is also risk of the rear elements of the "crop only" lens physically obstucting the mirror movement in the camera, possibly even damaging the camera. This is particularly a concern with "retro-focus" lens designs, that protrude deeply within the camera. Many ultrawide lenses are retro-focus designs.

So, while it will physically fit onto the camera, it likely won't work well... images likely will have a lot of vignetting. And it might intefere with the operation of the camera's mirror and damage your camera.


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Echo63
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Oct 05, 2013 21:52 |  #3

What he said ^^^^^^

I have a Sigma 10-20mm DC lens that works fine on my 1d bodies (except my wife used it and now it's soft)
It does vignette badly from 10-12ish mm though, because it wasnt designed to cover the larger APS-H sensor - it works fine from 12mm on though.


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Oct 06, 2013 05:14 as a reply to  @ Echo63's post |  #4

I use my Sigma 8-16 and (rarely), my 30 f/1.4 on my 1DMkIII ... no problem with fit or damage with either. Little, if any, vignetting with the 30mm (when used at f/4 or faster) and when using the 8-16 at 11mm or longer. This gives me "effectively" a 39mm f/1.4 and a 14-21mm f/4.5-5.6 for the 1DMkIII.

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J.A ­ Blix
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Oct 06, 2013 06:04 |  #5

How will i know if its damages the camera?


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dpds68
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Oct 06, 2013 10:12 |  #6

As said it wont Damage the Camera or Lens it will fit great but will result in Vignetting on the image not like the Canon EF-S series Lens that have a projection at the back if used on a FF Camera the mirror will hit the projection ( I think I have that correct ) .


David


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J.A ­ Blix
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Oct 06, 2013 10:24 |  #7

So the camera cant get hurt, only the image? Because the images looks great. Im just afraid my camera will get hurt!


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garciarf
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Oct 06, 2013 12:25 |  #8

J.A Blix wrote in post #16349501 (external link)
How will i know if its damages the camera?

See how far out the rear element sticks out. My rule of thumb is that if it sticks out past the rear of the mount, then it's unsafe to use as it might hit the mirror.

You could also try the experimental method.


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Oct 06, 2013 12:28 |  #9

It sounds like you've already shot using the combination & if so if the mirror hasn't hit it by now it won't in the future. I've used a few 3rd party lenses on my 1D2n's & 1D4 as well as on my 1Ds2 without any damage.

Here's the link to a sample set I posted on Canon's forum using a Tamron 18-270 VC on a 1Ds2

http://forums.usa.cano​n.com …/6667/highlight​/true#M458 (external link)


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J.A ­ Blix
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Oct 06, 2013 12:42 |  #10

Yeah, i thought that if i can take photos with the setup, the pictures are good, then it must be ok, right?


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Maxdave
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Oct 07, 2013 05:16 as a reply to  @ J.A Blix's post |  #11

These three images, unedited and uncorrected, were taken with my Sigma 8-16mm f/4.5-5.6 DC lens mounted on my 1DMkIII. The camera position was kept constant.
The aperture used, f/8, was also kept constant.
The lens was set at 8mm (left image), 11mm (centre image) and 16mm (right image).
Vignetting is obvious at 8mm, virtually invisible at 11mm, and absent when set at 16mm.
The focal lengths are effectively ~10mm, ~14mm and ~21mm allowing for the 1DMkIII's 1.3x crop factor.

Maxdave


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Maxdave
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Nov 12, 2013 07:02 as a reply to  @ Maxdave's post |  #12

Another one, this time in the field, 1DMk3 with Sigma 8-16mm used at 16mm setting.


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DC Lens on 1D body?
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