Aleś Bułojčyk
2017-06-13 08:43:37 UTC
Hi All.
My goal is to checking ability to use libgphoto2 in future for shooting
pictures by computer control. It would be great to have 2 pictures per
seconds speed.
For testing, I'm trying to use gphoto2 2.5.9 with Canon 700d.
I'm using S1 picture size with lens switched to MF. As far as I understand,
capturetarget switched to SDRAM by default:
ââââââââ$ gphoto2 --get-config capturetarget
Label: Capture Target
Type: RADIO
Current: Internal RAM
Choice: 0 Internal RAM
Choice: 1 Memory card
I tried to make 5 shots by --capture-image-and-download command, but 5
shots was required ~30 seconds ! See debug info at the
https://drive.google.com/open?id=0B79T6_pg7ncVX2w5WktESWZ6Qmc
After that, I disabled lens aberration correction, and time was decreased
for 1 second. See
https://drive.google.com/open?id=0B79T6_pg7ncVbFRGU0tVN3Y1UEU . It's still
too slow.
I tried also way when picture will be stored on camera. I will retrieve it
later. Command is : "--trigger-capture --wait-event=FILEADDED". 5 shots was
require 4.65 seconds. It's much better, but still too slow. See
https://drive.google.com/open?id=0B79T6_pg7ncVUDcteHlPdW9YTFE
There are some questions:
1. Why downloading of ~1.2 mb picture requires ~5 seconds ? It's difference
between capture-and-download and trigger.
2. Can I decrease shooting speed by some other parameters ? I'm already
using MF.
3. By the http://www.imaging-resource.com/PRODS/canon-t5i/canon-t5iA6.HTM,
camera should require 0.36 sec for shooting and ~0.15 for transfer.
4. I understand that 700d should lock up mirror before every shot. And it's
impossible to lock up it once, then shooting. If I will use Canon EOS M10,
it should work faster since there is no mirror. But
http://www.imaging-resource.com/PRODS/canon-eos-m10/canon-eos-m10A6.HTM
reports 0.7 sec shooting speed. Canon PowerShot G9 X requires even 0.88
sec for shooting by the
http://www.imaging-resource.com/PRODS/canon-g9x/canon-g9xA6.HTM. Why they
are so slow ?
5. Are there any good-supported faster but not expensive cameras ? Picture
quality is not so critical.
WBR, Alex.
My goal is to checking ability to use libgphoto2 in future for shooting
pictures by computer control. It would be great to have 2 pictures per
seconds speed.
For testing, I'm trying to use gphoto2 2.5.9 with Canon 700d.
I'm using S1 picture size with lens switched to MF. As far as I understand,
capturetarget switched to SDRAM by default:
ââââââââ$ gphoto2 --get-config capturetarget
Label: Capture Target
Type: RADIO
Current: Internal RAM
Choice: 0 Internal RAM
Choice: 1 Memory card
I tried to make 5 shots by --capture-image-and-download command, but 5
shots was required ~30 seconds ! See debug info at the
https://drive.google.com/open?id=0B79T6_pg7ncVX2w5WktESWZ6Qmc
After that, I disabled lens aberration correction, and time was decreased
for 1 second. See
https://drive.google.com/open?id=0B79T6_pg7ncVbFRGU0tVN3Y1UEU . It's still
too slow.
I tried also way when picture will be stored on camera. I will retrieve it
later. Command is : "--trigger-capture --wait-event=FILEADDED". 5 shots was
require 4.65 seconds. It's much better, but still too slow. See
https://drive.google.com/open?id=0B79T6_pg7ncVUDcteHlPdW9YTFE
There are some questions:
1. Why downloading of ~1.2 mb picture requires ~5 seconds ? It's difference
between capture-and-download and trigger.
2. Can I decrease shooting speed by some other parameters ? I'm already
using MF.
3. By the http://www.imaging-resource.com/PRODS/canon-t5i/canon-t5iA6.HTM,
camera should require 0.36 sec for shooting and ~0.15 for transfer.
4. I understand that 700d should lock up mirror before every shot. And it's
impossible to lock up it once, then shooting. If I will use Canon EOS M10,
it should work faster since there is no mirror. But
http://www.imaging-resource.com/PRODS/canon-eos-m10/canon-eos-m10A6.HTM
reports 0.7 sec shooting speed. Canon PowerShot G9 X requires even 0.88
sec for shooting by the
http://www.imaging-resource.com/PRODS/canon-g9x/canon-g9xA6.HTM. Why they
are so slow ?
5. Are there any good-supported faster but not expensive cameras ? Picture
quality is not so critical.
WBR, Alex.