Use of lenses

[martin_darling]

<p>Recently purchased Canon EOS 5D MK 11, when using it with Sigma 18 - 50mm zoom lens, edges of photos are dark (Vignetted). Using same lens with Canon EOS 30D presented no such problem. Any suggestions / ideas?</p>

[arie_vandervelden1]

<p>The 18-50 is designed for crop cameras such as the 30D. The 5D2 has a larger sensor than the 30D, and the image circle projected by the lens is smaller than the sensor.</p>

<p>Suggestions: either crop the photo or get a full-frame lens (e.g. Tamron 28-75/2.8)</p>

[kevin_penczak]

<p>the 18-50 is for crop cameras, such as your 30D. It was not originally intended for full frame cameras like your 5D.</p>

[JDMvW]

<p>Canon makes their APS-C lenses (the EF-S series) so that they will not mount at all on the larger sensor cameras. Third party lens makers, usually make their mount for the APS-C cameras the same as the regular EF mount. So they <em>will</em> mount, but as you have discovered, they do not cover the field of the larger sensor, and indeed were made specially NOT to do so. If you are willing to accept some vignetting, you can use them, it does no harm to lens or body, but it's like trying to cover a 6x6cm negative with a 35mm lens--it just won't stretch to it.<br>

Here's the coverage of the Sigma 10-20mm lens on the 5D. Since the viewfinder doesn't show the whole frame (boo...), it looks better in the viewfinder than it does when you examine the whole image. Probably most APS-C camera lenses that can be mounted would vignette about the same.</p><div></div>

[bob_osullivan]

<p>Be careful, do not try this with a Canon original lens. If you try to mount a Canon EFS lens to a FF or film body you could damage the lens and or the body. The EFS lenses protrude further into the body to move the rear lens element closer to the sensor or film plane which is preferable. They can do this because on a 1.6 crop body the mirror is smaller. On a FF body the mirror can collide with the back side of the lens.</p>

[bobatkins]

<p>You can't mount an EF-S lens on a full frame body. Canon designed it that way so you couldn't cause damage with those EF-S lenses that protrude deeper into the camera body.</p>

<p>It also eliminates complaints like this one when people mount APS-C coverage lenses on full frame bodies then wonder why they see extreme vignetting. Cuts down on the number of calls to Canon Tech Support!</p>

[tommyinca]

<p>Put on a Kenko 1.5X Teleconverter should solve the problem. But then you will end up with a not so hot 28-70/4 full frame set-up. </p>

[rainer_t]

<p>A good time to look on the different lens designators of the different manufacturers again:</p>

<p>Canon: "EF-S" designed for crop 1.6, does not mount on Cameras with EF mount. (so, does not mount on all fullframe + all crop-1.3 + D30 + D60 + 10D)</p>

<p>Tamron: "DiII" designed for crop 1.6, does mount on all cameras EF/EFS mount, but vignets badly on fullframe or crop-1.3.</p>

<p>Tamron: "DiI" designed for digital, but also designed for fullframe. mounts on all cameras with EF/EFS mount.</p>

<p>Sigma: "DC" same as Tamron DiII</p>

<p>Sigma: "DG" same as Tamron DiI</p>

<p>Tokina: "DX" same as Tamron DiII</p>

[yakim_peled1]

<p>

<p dir="ltr">You bought a good camera. If you haven't done so already I suggest to buy some equally good FF lenses.</p>

<p dir="ltr"> </p>

<p dir="ltr">Happy shooting,</p>

<p dir="ltr">Yakim.</p>

 

<p dir="ltr"> </p>

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[markonestudios]

Canon's 17-40L immediately springs to mind :)