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Apprentice
Posts: 10
Registered: ‎08-01-2017
Message 1 of 3 (674 Views)

Sony Alpha A7R mk III : star eater ?

Hello

 

I'm still very attracted by the sensitive sensors from Sony and wonder if I could buy the new Sony Alpha A7R mk III.

 

BUT

 

I am also very interested in nightscapes and astrophotos (large field with 200-300 mm focal lenses).

 

I am aware that the A7, A7S, A7R, mk I and mk II all suffer from the star eater filter, a filter dedicated to eliminate the hot pixels from the photos that misleads stars with hot pixels. There is indeed a petition ongoing on Change with more that 6200 supporters to date (that's huge and never seen in the photography industry !). This filter cannot be desactivated and affects the RAWs (this is not the LENR).

 

Therefore, before spending a lot of money to replace my Canon 6D and its lenses (24-70 f/2.8L USM II and 70-200 f/4L USM), I want to know if Sony officially adressed that issue on the A7R mk III.

 

Clear Sky

 

Fred

Specialist
Posts: 17
Registered: ‎06-16-2015
Message 2 of 3 (571 Views)

Re: Sony Alpha A7R mk III : star eater ?

[ Edited ]

My own examination of the raw files produced by Drew Geraci in his very well publicised test shows that the A7RIII is using the same spatial filtering algorithm as the A7RII firmware v4.0

 

So if you're happy with the spatial filtering on the A7RII v4.0 (which is less destructive than the original star eater) then you'll be happy with the A7RIII but if you're unhappy with the A7RII v4.0 you'll be unhappy with the A7RIII also.

 

Mark

Specialist
Posts: 17
Registered: ‎06-16-2015
Message 3 of 3 (545 Views)

Re: Sony Alpha A7R mk III : star eater ?

[ Edited ]

I won't insert a link here because it might be deleted.

 

However, perform a google search for Mark Shelley Astrophotography and you'll find links to information on star eater and on diagnosing star eater.  The methodology used in diagnosing star eater is how I determined that the A7RIII spatial filtering is identical to the A7RII firmware v4.0 spatial filtering.

 

Mark

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