Re: Electronic Shutter Artifacts in Sony A9 and Canon 1DX3 Images
arbitrage wrote: dclark wrote: arbitrage wrote: dclark wrote: arbitrage wrote: dclark wrote: Zenon Char wrote:
I made a mistake about the R6. It is 19ms. The R5 is 17ms. I'm in the middle of a family medical issue so I only get a little time for my hobby, or anything else which helps as a diversion. I'm still looking when I can.
Can you tell us the source of this information?
I know the R6 at 19ms was taken from the DPReview R6 video review where Jordon mentions it.
As for the R5, there are threads on DPR Forums where people were shooting light sources to produce the bands and using Jim Kasson's technique to calculate the scan rate from that. I'm not sure where to find that thread as it is probably many pages deep now in the EOS R forum section. The measurements gave about 1/60 for full frame and closer to 1/100 for APS-C. But there was back and forth discussion about if the light sources that people used had a constant output and if people really knew what the light source was outputting so at the time I didn't have full confidence in the results.
We need results from someone who knows what they are doing. Maybe Jim Kasson will make some measurements soon. His blog has been dormant for a few weeks. He was near a fire a few weeks ago and he may be threatened by the current fire situation. I hope not. There are more important things going on than this issue about electronic shutters.
BTW, the data above has the R5 faster than the R6 (and the IDX3?), which would be interesting if true.
I think I was using the wrong emoticon.
I was trying to convey that the measurement and discussion in the DPReview thread was incredible.
By that I mean not credible.
So inaccurate as to be nearly useless.
Is there anything better available?
Has anyone done any measurement that would reveal how the rows are readout?
Does the R5 and R6 ES show the same banding and streaks as the A9 and 1DX3?
I tried to rent an R5 to make some measurements but none are available at the local rental store. The demand greatly exceeds the supply, so it may be a while.
Once I get my R5 (likely the week of the 28th) I can try to test it. What would be the easiest way to test the scan rate?
I'm sure I can shoot some hummingbirds to find out if I get some banding/streaks in the wing blur...that part will be easy to find.
They told me mine is shopping the 23rd and I’ll get it at the end of the month.
Sep 16, 2020 at 04:55 PM
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