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R5 + 200-800 unusual rendering
- Thread starter Reza Raquib
- Start date
Chris Wolfgram
Veteran Member
Okay TY
I think we have these and California Thrasher in Cali. Long and Curved Bill in Texas and AZ
Reza Raquib
Forum Enthusiast
It was shot through an open window in the early morning. Since I can reproduce this effect shooting the same area, I will do some experiments to see if I can figure out if there is one single cause.
Reza Raquib
Forum Enthusiast
f9 at 800 was the whole idea for getting this lens, lol. Otherwise, I would have stuck to 100-500+1.4x TC (700 @ f/10).
J
jjbinx
Guest
Do you have a front filter on your lens ?
jj
jj
Reza Raquib
Forum Enthusiast
Yes, it was, but not to the point it became resolution-challenged. If you look at the bird, it looks fine.
Reza Raquib
Forum Enthusiast
No.
BirdShooter7
Forum Pro
Okay TY
This is really THE explanation. And this thread became pointless. Refer to that thread.
John Pane
Forum Enthusiast
This thread is not pointless. Probably many Canon users do not read the Nikon Mirrorless thread. If this is the first time the phenomenon is discussed here on the relevant Canon forum, it is quite useful.
K
kitjamesphotos
Guest
I wonder if it's the result of EFCS, did you try Mechanical only? I know that EFCS can make background and foreground blur very odd looking.
Reza Raquib
Forum Enthusiast
Here is a link to some of the RAW files people requested.
Link Here
A shot from yesterday with the bird is also included for comparison. The bird was not there, so I needed a different target to focus on; otherwise, it would have been the same setup. The shots are in groups of 3 in 200/500/100 SS: the first 3 in efcs, the second 3 with MS, and the last 3 in efcs and IS off. Interestingly, the effect from yesterday was not exhibited today.
I am at a loss as to under what condition Nisen Bokeh appears. The only thing I can think of is that yesterday's photos were about half-stop underexposed.
Link Here
A shot from yesterday with the bird is also included for comparison. The bird was not there, so I needed a different target to focus on; otherwise, it would have been the same setup. The shots are in groups of 3 in 200/500/100 SS: the first 3 in efcs, the second 3 with MS, and the last 3 in efcs and IS off. Interestingly, the effect from yesterday was not exhibited today.
I am at a loss as to under what condition Nisen Bokeh appears. The only thing I can think of is that yesterday's photos were about half-stop underexposed.
John Sheehy
Forum Pro
It doesn't happen near the plane of focus, only in front of it and behind it, so it HAS to be a bokeh issue. That comes from either something in the lens that only happens to unfocused things, or there is something in the path between the lens and the planting that is altering the bokeh. Even an out-of-focus black wire in the foreground, invisible in normal viewing, can alter bokeh. The problematic object doesn't even have to be in a direct path; it can be off to the side and come into the AOV because it is way OOF. This happens all the time when you try to photograph wildlife through narrow keyholes in foliage, although I never saw it quite like the OP's images. I suspect that if it isn't the lens elements coming out of place, that some kind of strings or wires are in-between, and the OP didn't notice them. If they are black, they affect bokeh, but do not lower contrast.
cfieldgate
Leading Member
What shutter mode were you using? Even the head of the bird looks smeared like shutter shock or vibration.
Reza Raquib
Forum Enthusiast
The bird was shot in efcs mode (my default)
cfieldgate
Leading Member
Still could be shutter shock. 1/200s is quite low. Birds move (small twitches) even when ‘stationary’. For me, it’s not a keeper.
My point is nothing is really sharp, so lens movement is likely part of the problem. EFCS may be responsible for the rendering in the (more) out of focus areas.
It’s one of the many reasons I love shooting electronic shutter (always) on my R3. More pixels would have been nice, but not if there is rolling shutter or shutter shock to spoil the result.
Reza Raquib
Forum Enthusiast
The photo was not a keeper; the entire series from that morning was trash. However, the bokeh rendering was extraordinary. I did reshoot the scene today with the same setting but a very different result.
Thanks.
This was converted from the RAW using DXO Photolab 7.
I also tried Photoshop/ACR. The results were similar. The artifacts are also visible in the Windows (11) Photos app.
If it was a software funkiness, it'd have to have been a widespread one.
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