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Old Aug 7, 2006, 8:52 PM   #1
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I have the 18-55mm kit lens that comes with the Rebel XT. Isn't this the same focal length roughly as a 28-80mm lens on a film SLR camera? I thought I read somewhere the ratio is 1.6 to 1.

The next lens I'm probably going to get is the 28-135mm f/3.5-5.6 IS USM, and was just wondering if it's going to be wide enough at 28mm. Wouldn't it be as wide as 18mm on my kit lens?

Any help clarifying this is greatly appreciated.

edit: Sorry if this is in the wrong forum, I meant to post it in the Canon Lenses forum. Oops. :sad:
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Old Aug 7, 2006, 10:34 PM   #2
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The kit lens is equal to a 28.8-88 mm lens.

For the 28-135 mm lens, on your XT it will be equal to a 44.8-216 mm lens. So, this lens would not be was wide as your kit lens.

All lenses that are poduced have their focal lengths as if they are used on a full frame or film camera. So, for any lens that you want to use on your XT, you need to multiply that number with the 1.6 form factor of the XT. This will give you the proper focal length with the camera/lens combo.

Hope this helps

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