alundeb wrote:
Thanks for the update, seems like Bulb mode doesn't make that much of a difference after all then.
Well, I can't go back and test firmware 1.0 now, but this shows that bulb mode has few hot pixels despite being a 12 bit mode. I do remember bulb mode looked better before, superficially at least.
alundeb wrote:
CaptureOne has a "single pixel" NR function, is it activated?
None of things I have posted in this thread are from Capture One.. but I have previously shown it gives better results - with all NR etc turned off.. and yes it also has the single pixel NR which works. As does the PS action Fred posted - but my point is these are all hiding things that shouldn't even be there, and most likely have downsides in some situations.
secondclaw wrote: I am sad now ... I was hoping this actually fixes the problem so I can re-order the camera ... ugh.
Thanks the the test, Fred.
Also, do you mind trying a 6-min comparison at ISO100? That's the one that puzzled me when I tried it. And, I only pushed it a little to get that ugly noise (+1EV, +40 shadow).
Here is is for you. (FW v1.10)
ISO 100, LENR OFF, 6-min
ISO 100, LERN OFF, 6-min, +1EV, +40 shadow
ISO 100, LERN OFF, 6-min, +3EV
And here is a comparison between my A7R and A7RII with the new firmware. I was hoping for a firmware fix but it does not seem to be the case. I will definitely be using the A7R for long exposure shooting.
When comparing chroma noise from both A7RII firmwares (1.0 vs 1.10), I'm actually thinking it was actually a downgrade. Anybody shares the same thought?
Fred
Fred Miranda wrote:
When comparing chroma noise from both A7RII firmwares (1.0 vs 1.10), I'm actually thinking it was actually a downgrade. Anybody shares the same thought?
Fred
Yes, I think your images from 1.10 look much worse than from your image from 1.0. I'm leaving mine on 1.0 and hope I'm not eventually forced to have my RAWs processed in this way to get lossless RAW files.
stevei wrote:
Yes, I think your images from 1.10 look much worse than from your image from 1.0. I'm leaving mine on 1.0 and hope I'm not eventually forced to have my RAWs processed in this way to get lossless RAW files.
I took the first 30s/ISO3200 exposure with the camera pretty 'cold' (Not been used for hours). That was FW 1.0.
Then I updated the firmware, which took about 20 minutes...
Right after the update I took another 30s/ISO3200 picture. Those were the 2 crops displayed on my first post.
I was thinking that camera temperature perhaps played a big role on the difference since the camera was "On" for 20 minutes. Room temperature was the same though at about 76 degrees. I will re-test this with the camera 'cold' and see if there is any meaningful difference. If there is a will post another comparison from v1.0 and v1.10.
Fred Miranda wrote:
I took the first 30s/ISO3200 exposure with the camera pretty 'cold' (Not been used for hours). That was FW 1.0.
Then I updated the firmware, which took about 20 minutes...
Right after the update I took another 30s/ISO3200 picture. Those were the 2 crops displayed on my first post.
I was thinking that camera temperature perhaps played a big role on the difference since the camera was "On" for 20 minutes. Room temperature was the same though at about 76 degrees. I will re-test this with the camera 'cold' and see if there is any meaningful difference. If there is a will post another comparison from v1.0 and v1.10.
My line of thought is that the IBIS feature means that it will be more difficult to conduct the heat away from the sensor since it is not attach firmly to the camera body mass.
It might help to open the screen from the body though. I read that this was the cure for overheating when shooting 4K.
I'm going to update my A7R II on Saturday - if anyone wants any specific before and after tests shooting (preferably that can be done indoors), let me know!
Matt Grum wrote:
I'm going to update my A7R II on Saturday - if anyone wants any specific before and after tests shooting (preferably that can be done indoors), let me know!
ISO 800, 4 minutes, LENR OFF, bulb, FW1.00
ISO 800, 4 minutes, LENR OFF, bulb, FW1.10
Thank you! Could you do this loooooong exposure at lower iso?
I like to shoot the milky way at 800 ISO, and with dark skies that would be about 4 minutes with the shutter open. Generally this gives a good exposure, so I do not push the shadows, but actually raise the black point some. It would be nice to see exposures not pushed 3ev as well.
I can upload a sample dark frame from the A7R version 1 with these settings.
Fred Miranda wrote:
I was thinking that camera temperature perhaps played a big role on the difference since the camera was "On" for 20 minutes. Room temperature was the same though at about 76 degrees. I will re-test this with the camera 'cold' and see if there is any meaningful difference. If there is a will post another comparison from v1.0 and v1.10.
That definitely could have a significant impact. I noticed that when I took one test picture pretty much from cold, messed about with some menu settings, then took another test picture, the 2nd one had noticeably more noise.
dgdg wrote:
ISO 800, 4 minutes, LENR OFF, bulb, FW1.00
ISO 800, 4 minutes, LENR OFF, bulb, FW1.10
Thank you! Could you do this loooooong exposure at lower iso?
I like to shoot the milky way at 800 ISO, and with dark skies that would be about 4 minutes with the shutter open. Generally this gives a good exposure, so I do not push the shadows, but actually raise the black point some. It would be nice to see exposures not pushed 3ev as well.
Thanks for offering to do this if you can!
David
David, seeing as it is right now, I think track-and-stack is a better option. And I understand your desire to shoot it at ISO 800 . Have you done any ISO 800 shot so far?
Stoffer wrote:
My line of thought is that the IBIS feature means that it will be more difficult to conduct the heat away from the sensor since it is not attach firmly to the camera body mass.
Have people observed a similar difference between the A7 and A7II as between the A7R and A7RII?
20 minutes is a bloody long time on a sensor. Phase backs heated up pretty fast and heat was always a big concern and that is really a open sensor. Sonys is contained in a very small space inside a body. I'm also thinking here on this long stuff the raw compression Sony is using is playing a role. Keep this to ourselves we will get more whining for the next year. Lol
Might be better we just wait until the uncompressed raws firmware comes out but these results should get reported to Sony
I am sad now ... I was hoping this actually fixes the problem so I can re-order the camera ... ugh.
. Have you done any ISO 800 shot so far?