Making a superzoom for a compact is easy, but for a DSLR, it's hard?

Started 10 months ago | Discussions thread
Leandros S
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Re: Getting to the bottom...
In reply to Mark B., 10 months ago

Mark B. wrote:

Leandros S wrote:

MoreorLess wrote:

Leandros S wrote:

People say that interchangeable superzoom ("travel") lenses can't manage good sharpness, yet superzoom compacts do just fine in terms of sharpness. Why is that?

smaller sensors being easer to design lenses for

But why?

Small sensors ==> small glass. Large sensors ==> large glass. It's much more expensive to make a superzoom lens for a large sensor because the image circle must project a larger image onto the sensor. It requires a lot more glass.

So when you say, "more glass", are you referring to overall volume/mass, or the number of lens elements? I'm not sure that superzoom compacts get away with fewer lens elements, and I don't think the glass volume is the problem either, since, as John1940 points out, you can get telezoom DSLR lenses starting at $100.

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