IsabellaR wrote:
Has anyone tested long time exposures (for example, 3 minutes or more)? In a German photo forum, one has detected strong noise (hot pixels)...
The sony mirrorless cams are notorious for this so I'm not surprised. Small bodies that run hot with little space to dissipate that heat. Dark frames mostly take care of it.
Vcize wrote:
The sony mirrorless cams are notorious for this so I'm not surprised. Small bodies that run hot with little space to dissipate that heat. Dark frames mostly take care of it.
It actually seems to be more of a BSI sensor vs. non-BSI, current BSI tech has more self-heating. Original Sony A7R is better in long exposures than the latter models. Same has been observed for Nikon D810 vs D850 (by Lloyd Chambers, at least), older non-BSI model is better when exposure times get longer; BSI tech shows way more hot pixels in this case too.
Bottom line heat causes noise. You really want to be in cool temperatures when shooting long exposures. When I shot Medium format this was a big issue with long exposures. Big issue
I use one of those usb battery packs with a fake battery in my a7rii if doing long exposures. That takes the hot battery out the camera and helps with hot pixels as a result
We tested this once with a Medium format back . A great digital tech guy and myself and it’s amazing what heat does to noise. I say pack the thing in ice. Lol
Not sure there is a fake battery yet for this cam. I wonder if we can take the battery out completely and power through the USB port. That would be ideal
GMPhotography wrote:
Like to get a link for that setup.
Not sure there is a fake battery yet for this cam. I wonder if we can take the battery out completely and power through the USB port. That would be ideal
Donesn't appear to work. I did a quick test with my Kmashi 15000 mAh external battery power bank and unless there is some internal setting I don't know about, the battery or a fake battery needs to remain in the camera for external power to charge the camera. I think this was the same with the A7rII. With the A7r2 I used the $20 Neewer AC Power Supply Adapter AC-PW20. Hopefully we will see something similar for the A9/A7rIII's NPFZ100 Z-series battery soon.
LBJ2 wrote:
Donesn't appear to work. I did a quick test with my Kmashi 15000 mAh external battery power bank and unless there is some internal setting I don't know about, the battery or a fake battery needs to remain in the camera for external power to charge the camera. I think this was the same with the A7rII. With the A7r2 I used the $20 Neewer AC Power Supply Adapter AC-PW20. Hopefully we will see something similar for the A9/A7rIII's NPFZ100 Z-series battery soon.
It definitely works, you need a dummy battery (not sure if there is an a9/7riii one available yet) and the external power pack. The dummy battery doesn’t heat up at all even after hours of constant use as it’s just electrical connections as opposed to a fuel cell. You plug the battery into the power pack and insert it in the camera I.e you are not connecting to the cameras usb point. I’ve tested this and it gives less hot pixels after prolonged long exposures . I got the dummy battery on amazon.
However SR app removes the need for this on the 7rii
The Sony Multi Battery Adapter (NPA-MQZ1) has an integrated dummy battery. The actual batteries are off camera in the adapter. The dummy battery adapts to both the A9/A7RIII and the older NP-50 battery compartments.
Anyone notice that the sensor is an absolute dust magnet? This is my sensor after one week of use, six lens changes and 800 shots. Also used rocket blower and in-camera sensor cleaning function before taking this shot. F/22 looking at a white wall and intentionally out of focus. Shows up on multiple lenses, so it’s definitely the sensor.
This is more dust than I had in 6+ months with my A7rii.
Messier77 wrote:
Anyone notice that the sensor is an absolute dust magnet? This is my sensor after one week of use, six lens changes and 800 shots. Also used rocket blower and in-camera sensor cleaning function before taking this shot. F/22 looking at a white wall and intentionally out of focus. Shows up on multiple lenses, so it’s definitely the sensor.
This is more dust than I had in 6+ months with my A7rii.
I didn't notice any difference. Perhaps it's because you've tried many lenses on it in a very short period of time. I just took a look at my sensor and it had one speckle on it. (After testing the new camera with at least a dozen lenses)
No more so than my A7RII was at the beginning. It felt to me like the more I cleaned my A7RII sensor the more dust prone it was, though I could find no ryhme or reason to what deposited the most dust on my A7RII sensor.
My 85/1.4 GM reported wrong apertures values on the A7R II and that has been corrected on the A7R III.
On the A7R II, it would go: 1.4, 1.6, 1.7, 2, etc...
I had mentioned before that f/1.7 does not follow the one-third-stop f-number scale and was an incorrect value
On the A7R III, it now shows: 1.4, 1.6, 1.8, 2.
Now, I'm unsure if the new camera is doing this or if the 85 GM had a firmware update that fixed this issue and I didn't notice.
Messier77 wrote:
Anyone notice that the sensor is an absolute dust magnet? This is my sensor after one week of use, six lens changes and 800 shots. Also used rocket blower and in-camera sensor cleaning function before taking this shot. F/22 looking at a white wall and intentionally out of focus. Shows up on multiple lenses, so it’s definitely the sensor.
This is more dust than I had in 6+ months with my A7rii.
That's every Sony A7 A9 A6XXX sensor - absolute dust magnet. I am just used to it knowing on Day 2 my sony will have dust.
if you want mirrorless body that never seems to collect dust - try Olympus.
LBJ2 wrote:
Donesn't appear to work. I did a quick test with my Kmashi 15000 mAh external battery power bank and unless there is some internal setting I don't know about, the battery or a fake battery needs to remain in the camera for external power to charge the camera. I think this was the same with the A7rII. With the A7r2 I used the $20 Neewer AC Power Supply Adapter AC-PW20. Hopefully we will see something similar for the A9/A7rIII's NPFZ100 Z-series battery soon.
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xpfloyd wrote:
It definitely works, you need a dummy battery (not sure if there is an a9/7riii one available yet) and the external power pack. The dummy battery doesn’t heat up at all even after hours of constant use as it’s just electrical connections as opposed to a fuel cell. You plug the battery into the power pack and insert it in the camera I.e you are not connecting to the cameras usb point. I’ve tested this and it gives less hot pixels after prolonged long exposures . I got the dummy battery on amazon.
However SR app removes the need for this on the 7rii ...Show more →
Hello Xpfloyd. You and I agree. I think you misread my comment. "I did a quick test with my Kmashi 15000 mAh external battery power bank and unless there is some internal setting I don't know about, the battery or a fake battery needs to remain in the camera for external power to charge the camera." I was responding to another comment asking if the camera would run with a direct connection to an external power source without a fake/dummy battery in the camera.
Does the 7r3 transfer photos at 3.1 speed over the USB C to computer indeed?
LBJ2 wrote:
Anybody else super happy about USB 3.1 in the new A7rIII ? Now 42MPs files moving at top speeds directly from the A7rIII to our computers. Yippee-yi-o-ki-yay ! Oh and no more fumbling with which side to fit into the Camera...but no such luck on the USB side into the computer USB slot. But okay I'll fumble 50% less now
Not sure if anyone noticed this is a nice feature. If you pull the tilt screen othe EVF goes off. So tripod work this is really nice your hand does not screw things up
Do we know if the screen and evf turn off fully or just go dark? Keen to know for timelapse and extending the battery life GMPhotography wrote:
Not sure if anyone noticed this is a nice feature. If you pull the tilt screen othe EVF goes off. So tripod work this is really nice your hand does not screw things up
