Strange Artefacts from EM1-MK2 when shooting the setting sun

pkwok · Nov 17, 2017

I shoot the setting sun with an EM1-Mk2 and a Zuiko 40-150 f/2.8 lens, a downward stream of light curtain is produced when about half of the sun has set, till it has nearly fully set.

I shoot full size jpeg, fine. The metadata: P mode, 1/500sec, f/5, 97mm, ISO200, sRGB, Natural rendering. I have a B+W MRC nano filter in front of the lens, which I don't think is related to this artefacts.

It seems to be a sensor mismatch or miscalculation issue. Does anyone have similar experience? Do I need to take this for repair? or wait for next firmware update?

Danielvr · Nov 17, 2017

pkwok said:
[..] a downward stream of light curtain is produced when about half of the sun has set, till it has nearly fully set.

Why do you think it's an artefact and not just those last beams of sunlight brightening the haze and vegetation?

Skeeterbytes · Nov 17, 2017

Have never encountered anything like that, but the first one really looks cool! Filter, or bare lens?

Happy sleuthing,

Rick

drj3 · Nov 17, 2017

I have never seen that effect. However, I cannot imagine a camera problem which could cause this. It does not look like the normal flare on sees with a lens or filter flare.

I assume it was not caused by fog/mist or you would have noticed it.

Have you tried to replicate the effect again with the sun or just a very bright light in the frame?

Unless you find general problems with camera/lens/filter in other images with bright objects in the field of view, I would think it was just some reflection off the lens/filter/sensor unique to that specific situation.

--
drj3

19andrew47 · Nov 17, 2017

I have never seen anything quite like these before. I am not convinced they are artefacts produced within the camera. Take the filter off the lens and try to replicate the issue would be my suggestion. No filter is perfect and perhaps this was too much even for your highly regarded filter.

Andrew

epozar · Nov 17, 2017

Silent shutter?

drj3 · Nov 17, 2017

epozar said:
Silent shutter?

JimH123 · Nov 17, 2017

pkwok said:
I shoot the setting sun with an EM1-Mk2 and a Zuiko 40-150 f/2.8 lens, a downward stream of light curtain is produced when about half of the sun has set, till it has nearly fully set.

I shoot full size jpeg, fine. The metadata: P mode, 1/500sec, f/5, 97mm, ISO200, sRGB, Natural rendering. I have a B+W MRC nano filter in front of the lens, which I don't think is related to this artefacts.

It seems to be a sensor mismatch or miscalculation issue. Does anyone have similar experience? Do I need to take this for repair? or wait for next firmware update?

It certainly looks like an internal reflection. If you rotate the camera 90 degrees, does it change?

pkwok · Nov 18, 2017

Thanks everyone for your enthusiasm. To answer some of your suspicion,

1. Haze?

The seeing is not too bad. Though we have some smog at this time of the season. I have attached 2 other photos taking shortly before the 2 photos I posed. These 2 earlier photos show no such "artefacts".

2. Related to bright light source?

Not seen in photos taken just a bit earlier. (See the attached photos).

3. Electronic/silent shutter?

I checked that already. It is just a simple shutter, single frame per shot, no silent mode.

4. Filter related?

Again, not seen in earlier photos. I haven't taken out the filter and try it. B+W usually is not this bad,

drj3 · Nov 18, 2017

pkwok said:
Thanks everyone for your enthusiasm. To answer some of your suspicion,

1. Haze?

The seeing is not too bad. Though we have some smog at this time of the season. I have attached 2 other photos taking shortly before the 2 photos I posed. These 2 earlier photos show no such "artefacts".

2. Related to bright light source?

Not seen in photos taken just a bit earlier. (See the attached photos).

3. Electronic/silent shutter?

I checked that already. It is just a simple shutter, single frame per shot, no silent mode.

4. Filter related?

Again, not seen in earlier photos. I haven't taken out the filter and try it. B+W usually is not this bad,

Then your camera/lens/filter all look okay. While it could be an internal reflection, I cannot think of any that would produce such a distinct, well defined limited reflection like that in the first image in your original post. Maybe some reflection off the street lamp or off the roof of the building below onto the front of the filter/lens could have caused it.

--
drj3

thinker · Nov 18, 2017

Since a/the post is illuminated by the 'Artefact' instead of being obscured by it, I vote for Danielvr's thoughts.

drj3 · Nov 18, 2017

thinker said:
Since a/the post is illuminated by the 'Artefact' instead of being obscured by it, I vote for Danielvr's thoughts.

After looking at the second image, I agree. The lighter/darker pattern of the light definitely corresponds to the tree line under the sun.

pkwok · Nov 18, 2017

Thanks again.

See if I can reproduce it in another sunset.

Olyinaz · Nov 18, 2017

...would be my guess, and it could be at the sensor layers. I've seen my cameras do this from time to time over the years and almost always at sunset or partial sunset like this. No idea what the physics of it are, but it seems to be somewhat common.

with-every-sunset-be-proud-of-today-s-achieveme-8-11-2017-12-57-47-pm-m.jpg

Oly

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