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anyone modded eos r successfully for astrophotography?

Started Nov 18, 2020 | Discussions thread
Marco Nero
Marco Nero Veteran Member • Posts: 7,582
Re: anyone modded eos r successfully for astrophotography?
1

Franz Kerschbaum wrote:

Concerning the bright star problem Marco mentioned a short asessment and cure from my side:

As shown by quite some recent examples the EOS Ra has a problem with extremely brigth stars in the filed by showing red internal reflexions. This is NOT a problem of the lens but something close to the sensor/filter stack!

It's funny to notice but the only real issue I had with the Ra was with Mars as well.  It's very close in the sky at the moment and when it's offset and shot with a wide aperture, it seems to produce a color bloom.  Otherwise, I've been particularly impressed with what it can do. And yes, I agree that the issue seems to be related to a single refraction-capable layer within the sensor stack.  It's interesting that this camera was in use for quite some time before someone noticed.  It also occurs in images taken with non-Canon deep space exposures from multi-million-dollar arrays.  In my experience, the aperture used seems to have a lot of impact on the effect.  The only reason I haven't used smaller apertures is because I'm only shooting from a non-tracking tripod.
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Regards,
Marco Nero.

 Marco Nero's gear list:Marco Nero's gear list
Canon EOS M6 Canon EOS Ra Canon EOS R6 Canon EF-M 32mm F1.4 Canon RF 85mm F1.2L USM +20 more
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