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Archive 2017 · Banding on my new A7RIII

Valvicphoto
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p.1 #1 · p.1 #1 · Banding on my new A7RIII

What the hell? I just got this camera on Friday. I shot a model on Saturday morning, this morning, and an equestrian event today. I just got home and all my pics are great, except this set that I have an example of here. Look at this banding! There are about 75 pics or so that are all like this!

Shot with the 70-200 GM 2.8, and I was using a flashpoint trigger with an AD200 camera left.

Help please. No other pics at all out of 2000 have this issue.(except this set)

Dec 03, 2017 at 04:52 PM

vario1
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p.1 #2 · p.1 #2 · Banding on my new A7RIII

Need more info. Since this set is different than the others you shot, what was different about the lighting setup?

Dec 03, 2017 at 04:55 PM

Valvicphoto
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p.1 #3 · p.1 #3 · Banding on my new A7RIII

Nothing. I did not change anything besides maybe shutter speed or something, and maybe flash intensity. I did not mess with silent shutter or E shutter

Dec 03, 2017 at 04:58 PM

snapsy
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p.1 #4 · p.1 #4 · Banding on my new A7RIII

These look like light boundaries from high-speed sync (which of course still shouldn't be visible). Were you using the multi-stroboscopic mode of the AD200 (ie, faster than x-sync shutter speed).

Dec 03, 2017 at 05:00 PM

Valvicphoto
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p.1 #5 · p.1 #5 · Banding on my new A7RIII

Yes, I was using HSS almost all morning today. I have no other sets with these issues, same light.

Dec 03, 2017 at 05:01 PM

snapsy
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p.1 #6 · p.1 #6 · Banding on my new A7RIII

Valvicphoto wrote:
Yes, I was using HSS almost all morning today. I have no other sets with these issues, same light.

It might have something to do with the EFCS (Electronic First Curtain Shutter, which is the hybrid mechanical/electronic shutter mode rather than the silent/fully-electronic shutter), so I would try it with the full mechanical shutter as well.

Dec 03, 2017 at 05:04 PM

Valvicphoto
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p.1 #7 · p.1 #7 · Banding on my new A7RIII

I only have the camera on full mechanical shutter. Also, the shots were all shot at 1/6500s and 1/8000s

Dec 03, 2017 at 05:05 PM

snapsy
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p.1 #8 · p.1 #8 · Banding on my new A7RIII

Valvicphoto wrote:
I only have the camera on full mechanical shutter. Also, the shots were all shot at 1/6500s and 1/8000s

hmmm...Since sensor reset+readout occurs with the shutter curtains closed in full-mechanical mode this shouldn't be a potential readout issue - the banding would have to have occurred in the actual light during the exposure. Unless there is some RF issue, or a problem with the ADC on your body.

I would try some experiments at home to see if this is reproducible. We can devise some more experiments if it is.

Dec 03, 2017 at 05:12 PM

Valvicphoto
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p.1 #9 · p.1 #9 · Banding on my new A7RIII

I have a shoot all day tomorrow, and I will try to keep tabs on it and check my pictures.

Vito

Dec 03, 2017 at 05:14 PM

snapsy
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p.1 #10 · p.1 #10 · Banding on my new A7RIII

Looking at the image more closely the banding lines are spaced too closely together for them to boundaries of HSS strobes - the flash wont strobe that often even at the fastest shutter speed. So my guesses would be an RF issue, or perhaps even sensor blooming.

Dec 03, 2017 at 05:35 PM

Valvicphoto
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p.1 #11 · p.1 #11 · Banding on my new A7RIII

What is sensor blooming? They are not HSS banding, as I have seen that before and it looked nothing like this.

Vito

Dec 03, 2017 at 05:39 PM

snapsy
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p.1 #12 · p.1 #12 · Banding on my new A7RIII

Valvicphoto wrote:
What is sensor blooming? They are not HSS banding, as I have seen that before and it looked nothing like this.

Vito

Sensor blooming is when a row or column of pixels that reaches full saturation (highlight clipping) bleeds onto adjacent rows/columns of pixels.

Dec 03, 2017 at 05:42 PM

mogul
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p.1 #13 · p.1 #13 · Banding on my new A7RIII

It looks to me as background lights (led or florescent) pulsing....try using tungsten and compare

Dec 03, 2017 at 05:42 PM

snapsy
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p.1 #14 · p.1 #14 · Banding on my new A7RIII

mogul wrote:
It looks to me as background lights (led or florescent) pulsing....try using tungsten and compare

Frequency of the bands looks too high for that but I suppose it's possible under very high-frequency LED/PWM lighting.

Dec 03, 2017 at 05:45 PM

Valvicphoto
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p.1 #15 · p.1 #15 · Banding on my new A7RIII

These were shot outdoors, no lights besides the sun and my ad200

Dec 03, 2017 at 05:45 PM

GabrielPhoto
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p.1 #16 · p.1 #16 · Banding on my new A7RIII

The times I had banding like that with HSS was because EFCS was on. I disable EFCS anytime I am shooting over 1/1000 specially if I am using flashy and never have that issue after I disable it. Still was hoping for an option to set up a specific speed where EFCS will disable automatically.

Dec 03, 2017 at 05:47 PM

GMPhotography
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p.1 #17 · p.1 #17 · Banding on my new A7RIII

I was thinking about this and was just about to say EFSC. Yes we wish it kicked off at 1/1000 and above . On my 4th beer surprised I got that one . Lol

Dec 03, 2017 at 05:50 PM

GMPhotography
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p.1 #18 · p.1 #18 · Banding on my new A7RIII

It’s worth a test at least to try auto on the shutter choice see if it does kick off

Dec 03, 2017 at 05:52 PM

snapsy
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p.1 #19 · p.1 #19 · Banding on my new A7RIII

The bands also don't look like the typical Sony PDAF banding - the rows are too regular for that.

OP, can you PM me one of the affected raw files? I'd like to take a closer look.

Dec 03, 2017 at 05:54 PM

Valvicphoto
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p.1 #20 · p.1 #20 · Banding on my new A7RIII

snapsy wrote:
The bands also don't look like the typical Sony PDAF banding - the rows are too regular for that.

OP, can you PM me one of the affected raw files? I'd like to take a closer look.

Sure, do you want me to PM them or just to send them via wetransfer?

Dec 03, 2017 at 05:55 PM

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