Ed Hurst
Well-known member
Hello chums,
As regular members of this site will know, I make quite extensive use of my Pentax 645Z for high ISO, astro work. Milky Way shots quite often use ISO6400 or occasionally higher. I am reasonably happy with the results, but feel that more recent sensor tech might be able to do better. And I would like to achieve better noise performance while also improving resolution.
The GFX50 variants didn't represent a strong option for me. The sensor is the same as the 645Z. The high ISO noise is, if anything, slightly worse than the way that Pentax implemented the sensor.
However, with the GFX100 (higher resolution and newer sensor), there seems to be the potential for better high ISO noise performance. I first asked this question when the camera was being launched, and no one had sufficient experience with the camera to help. Does anyone here have experience of using the camera at ISO6400 or higher? Are you able to comment on its noise performance, especially compared to either the GFX50 models or the 645Z? There's no point getting higher resolution if I will lose any quality gain to noise. I am interested in pixel level noise as well as noise at a given print size...
Would be great to upgrade, but I am wary of doing so without this specific information. It's such an important part of my usage that I would accept my current lower resolution in good light if addressing it compromised my high ISO results.
Any experiences would be gratefully received...
Thanks in advance!
Ed
As regular members of this site will know, I make quite extensive use of my Pentax 645Z for high ISO, astro work. Milky Way shots quite often use ISO6400 or occasionally higher. I am reasonably happy with the results, but feel that more recent sensor tech might be able to do better. And I would like to achieve better noise performance while also improving resolution.
The GFX50 variants didn't represent a strong option for me. The sensor is the same as the 645Z. The high ISO noise is, if anything, slightly worse than the way that Pentax implemented the sensor.
However, with the GFX100 (higher resolution and newer sensor), there seems to be the potential for better high ISO noise performance. I first asked this question when the camera was being launched, and no one had sufficient experience with the camera to help. Does anyone here have experience of using the camera at ISO6400 or higher? Are you able to comment on its noise performance, especially compared to either the GFX50 models or the 645Z? There's no point getting higher resolution if I will lose any quality gain to noise. I am interested in pixel level noise as well as noise at a given print size...
Would be great to upgrade, but I am wary of doing so without this specific information. It's such an important part of my usage that I would accept my current lower resolution in good light if addressing it compromised my high ISO results.
Any experiences would be gratefully received...
Thanks in advance!
Ed