Will mirrorless camera sensor be damaged by HDR that includes the sun?

Started 6 months ago | Questions thread
forpetessake
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Re: Will mirrorless camera sensor be damaged by HDR that includes the sun?
In reply to Sidath Senanayake, 6 months ago

Sidath Senanayake wrote:

I don't think the focal length has anything to do with the amount of energy that's collected. All that matters is the f-stop. After all, that's what the whole point of the f-stop is for.

The fact that the f-stop is a ratio of both the front element diameter (effectively, it's actually the aperture I believe but the front element diameter is an upper bound) and the focal length means that it takes both into consideration.

Therefore, ignoring internal reflections, lens coatings, the incident angle of the sun to the lens (remember the front element is often curved) a 14mm f/2.8 is more likely to burn your sensor than an 800mm f/5.6.

That's correct, it's the brightness, i.e. light flux per unit area that cause local heating (neglecting the heat transfer). So the focal length doesn't matter, the f-stop does.

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