Canon EOS R5 - shutter shock, IS, long exposure
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Similar tests have already been done before, my goal was to analyse the shutter shock and at the same time IBIS on a tripod as I'm mostly interested in the landscape photography workflow. My setup included:
- Canon EOS R5 on a stable tripod indoors, no wind or shake
- A printed chart for sharpness (mostly focused on its central part as we're not testing sharpness of a lens)
- EF 24-7- f2.8L II lens
- Variable source of light to even out the exposure and be able to shoot at f3.5
18 shots were taken using all combinations of the following settings:
- Shutter speed [ 1/100s, 1/4s, 1s ]
- In-camera IS: [ on, off ]
- Shutter Mode: [ Mechanical, Electronic 1-st Curtain, Electronic]
- Aperture f3.5 (fixed so that different aperture doesn't cause different sharpness)
- Autofocus disabled (so that the camera doesn't refocus on every shot)
With electronic shutter the exposures were 0.5s instead of 1s but that wasn't the main goal of the test.
The conclusion:
- Don't use Mechanical Shutter unless absolutely necessary. The least sharp results came from 1/100s shots with Mechanical Shutter mode, with or without IS. The rest 16 shots aren't too different, the shutter shock seems to be negligible at 1/4s and 1s.
- IBIS during 1s exposure doesn't seem to introduce any significant blur (note the lens used in test doesn't have IS)
- EFCS and ES modes produce images of the same sharpness, but different quality (14bit vs 12bit), so there's no reason to use ES unless absolutely necessary (e.g. need to be very quiet).
So recommended setup for landscape photography on a tripod: EFCS and IS disabled, but if you forget to disable it, it won't cause bad consequences providing the lens doesn't have the IS itself.
Maybe I'll do more tests for very long exposures with different combos of IBIS and lens-IS.
Shot at 1/100s
1/100s, IS ON, MS
1/100s, IS ON, EFCS
1/100s, IS ON, ES
1/100s, IS OFF, MS
1/100s, IS OFF, EFCS
1/100s, IS OFF, ES
Shot at 1/4s (skipping Electronic Sutter mode as it looks the same as Electronic 1-st Curtain)
1/4s, IS ON, MS
1/4s, IS ON, EFCS
1/4s, IS OFF, MS
1/4s, IS OFF, EFCS
Shot at 1s (skipping the Electronic Shutter again for the same reason, also because it was shot at 0.5s)
1s, IS ON, MS
1s, IS ON, EFCS
1s, IS OFF, MS
1s, IS OFF, EFCS