EF Mount APS-C Sensors to Become: "a curiosity of the past."

Started Jul 23, 2012 | Discussions thread
hires Regular Member • Posts: 429
Re: Still a need for APS-C

Y0GI wrote:

hires wrote:

The first company that makes a 400 mm f4 efs lens that costs and weighs the same as the 400 5.6L wins. I don't know if this is possible though if anybody wants to weigh in? Might as well throw in IS also.

It's not likely that you'll see an EF-S 400mm lens anytime soon. I don't know the exact reasons why but while it is easy to build a short focal length lens, like the EF-S 18-55mm IS, smaller and lighter, the size differences diminish as focal length increases. Thus, the 'longest' telephoto lens in EF-S mount is the Canon 55-250mm IS lens. As the focal length increases, there is less and less of a size difference between EF and EF-S mount lenses.

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The 55-250 is 5.6 at 250 and 400 grams.  So it's seems there might be some room for improvement by making an EF-S 400 or 500.

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