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

Started Oct 7, 2013 | Discussions thread
dherzstein
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Re: Making a superzoom for a compact is easy, but for a DSLR, it's hard?
In reply to weezy, Oct 7, 2013

weezy wrote:

I don't know about lens size, sensor, etc, but I have a Canon SX 50 and I keep a #4 gray filter on it. I was asking about using a polarizing filter instead and asked the camera store which filter the SX 50 would use. It takes the non-rotating one.

All polarizer filters rotate - they have to.

Perhaps you meant to say "circular polarizer"?  Digicams can use either "linear" or "circular" polarizers.  Linear polarizers are less expensive.

So why do lenses for DSLRs rotate, and the bridge camera superzooms don't?

DSLRs use beam-splitters and circular polarizers are required for proper metering.

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