Sigma DP1/DP2/DP3 Merrill flare comparison

Started May 26, 2013 | Discussions thread
Roland Karlsson
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Re: Thanks Robert,
In reply to mark-vdi, May 26, 2013

mark-vdi wrote:

Hi Roland, at a guess, if it is caused by a double internal reflection first off the micro-lens covering the sensors and then back off the surface of the last lens element, then, if the last element has a convex surface, it will magnify and distribute the spots with the spots furthest from the centre becoming more distorted since this reflection strike an oblique surface . . .

Yeah, maybe ...

But how do you explain that they always are red?

The only bright red reflection in the DP camera comes from the IR filter.

The IR filter is probably flat.

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