Canon EF-S vs EF lenses

Started Apr 16, 2005 | Discussions thread
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aperestrello New Member • Posts: 8
Canon EF-S vs EF lenses

I think I'm finally figuring out the benefit to digital specific lenses over the standard ones, in that they are designed to negate the "35mm effect" e.g. 18mm is actually 27mm with the 1.5x of a 350d

However, im still a bit confused about how their focal lengths.

The question is: Are the Canon EF-S lenses regarded as Digital specific and if so, are their focal lengths quoted as true or digitally corrected? E.g. is the 18-55 EF-S lense actaully a 12mm to 37mm?

The reason I ask is that im interested in the standard kit EF-S 18-55mm f/3.5-5.6 and an additional EF 55-200mm f/4.5-5.6 USM II lens. But if they are not both EF-S then is there a gap between the two lenses of approx 25mm?

I think im missing something here but i cant find out the final answer and i guess im not sharp enough to figure it out for myself.

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