Best DSLR or ILC for Night Sky Imaging?

Started Nov 8, 2017 | Questions thread
1llusive Senior Member • Posts: 1,571
Re: Best DSLR or ILC for Night Sky Imaging?

sharkmelley wrote:

RustierOne wrote:

My question:

The star eater began kicking in at Bulb = 30 seconds. But a later firmware upgrade lowered that to a shorter exposure. Do you know what the limit is on current new A7S cameras?

The A7S star eater still only happens in bulb mode. So all exposures longer than 30sec are affected (because they have to be done in bulb mode) as well as short exposures done in bulb mode.

The expansion of the star eater issue to all exposures 4sec and longer was done only to the Mark 2 models i.e. the image stabilised models, because of the complaints about increased noise in long exposures compared to the Mark 1 models. The increased noise was probably thermal noise caused by the fact that the sensor has to free to move around and so it can no longer be in contact with heat sinks.

I can't see Sony ever going back to fixed sensors because photographers love image stabilisation, so the Sony A7S will probably remain the best ever Sony camera for low thermal noise.


And if one were looking for low read and thermal noise for long-exposure astrophotography, looking at the same outlay, I think there are better buys:

And no eaten stars!

There are of course many other options in sensor and pixel sizes.

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