a7RIV eats stars

Started 2 months ago | Discussions thread
Magnar W
Magnar W Senior Member • Posts: 4,187
Re: a7RIV eats stars

JimKasson wrote:

My guess is that if you're happy with the a7RIII in this regard, the you'll like the a7RIV, too.

Yes, I suppose so.

Is there any differences with uncompressed raw?

If you've been averaging a7RIII images made at 3.2 seconds as a workaround, you'll have to drop the exposure time by a third of a stop.

For real world astro work I prefer longer single exposures for stacking, since loss of faint stars doesn't matter that much for the look & feel of the end results.

People don't notice stars that are not recorded anyway.

The tradeoffs made by the a7RIV in terms on conversion gain and the "Aptina trick" are not as good for astro as the way the a7RIII works.

Ideally, I would prefer a on-off filtering/"star eater" setting in the camera and then deal with noise when processing the frames.

 Magnar W's gear list:Magnar W's gear list
Sony a7 Sony a7R III Sony FE 90mm F2.8 macro Zeiss Loxia 21mm F2.8 Zeiss Loxia 35 +2 more
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