It would be appreciatd if anyone could offer any explanation for this. Around two months ago I purchased a Canon EOS R and have been gradualy getting used to its differences from its predecessor a 6D Mark II. One of the features of the EOS R is an incorporated HDR function with a few different options/strengths adjustment. The above photograph was taken last night in good clear weather conditions with no trace of fog mist or rain. As you will see there are mystery lights in the sky, which I can not explain.
My initial thoughts were around the area of dirt/dust on the lens, filter or sensor. The camera is only 2 months old and I always switch it off when changing lenses so I would not expect the sensor to become dirty. I clean the lenses with a blow brush and Zeiss lens wipes and the same for the UV filter, both of which appear clean.
I would guess that it could be digital artifacts from either the high ISO or perhaps even issues with the HDR feature via the camera menu. I’d suggest trying the Raw format and bracket a series of exposures and try using software to combine the raw images for an HDR and see if the Raw images have that type of artifact. My first thought was that you had moving aircraft with a long shutter speed exposure but since your shutter speed was 1/60th I’m sure that is not it. Hope you figure it out.
As above it looks like digital artifacts. I note the iso is 12800 which even with a modern camera is pushing it a bit. At a guess it's a bit like hot pixels that you get on long exposures. I'm not familiar with the EOS R but most cameras will have the option of built in noise reduction where it takes a second dark frame and removes the artifacts that appear in both.
As Josh suggest, also were you shooting thru a double pane window? Four of the artifacts look like some sort of reflection/refraction from the crane that they are in line with. The others look like car headlight, but I can't match them with anything else in the picture.
There is some light streaks around the edges which might be from having the lens wide open? And was the camera on a tripod?
Many thanks for your responses to this. The answer appears to be light bouncing between the UV filter and lens. Please see photographs above. The first is taken with the UV filter on and the second without it. Both images are reduced in size to make handling a little quicker. Focus is set on the tall hotel building. Hand held - no tripod.
@lumpiniman Very interesting... glad you got your answer. I always have filters on all my lenses... I'll have to keep this in mind in case I ever have this type of issue.
@kvphoto@lumpiniman
This has been so very interesting and constructive. Thanks for the opportunity for learning. I was wondering why would you use a UV filter on a night scene. At some point I purchased a set of filters and whereas I could see the effects of the polarizing filter and of the ND filter, I could not see what the UV filter is useful. I had it on, for a while, for protecting the lens.
To answer your question, I have a UV filter on all my lenses purely for protection and to keep dirt off the lens. Obviously a lesson to be learnt in this case particularly as the shot was taken from my balcony, so not really much risk to the lens.
@lumpiniman I see! Thank you for the clarification. So it is good for protection and sometimes bad because of the light bouncing effect. It is a really useful lesson. I appreciate your taking the time.
@monikozi
I spend a good deal of my time in South East Asia, where it can be hot but damp due to high humidity. My place out here is not far from the coast with a sandy beach. I value the protection a filter gives. That said clearly there is a quality issue particularly in the dark. I will have to remove the filter for some shots but overall I would be reluctant to abandon them.
I took a very similar shot this evening with my Canon EF 24-70mm f/4L IS USM with a filter fitted. The result is as above. The lens used in the original shot was a 1.4 50ml Canon EF lens. On checking the filter on this 50 mm lens I found it is a PhotR UV filter.
I am thinking now it is that particular filter that is the cause of the original problem.
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There is some light streaks around the edges which might be from having the lens wide open? And was the camera on a tripod?
Filter
No filter
Many thanks for your responses to this. The answer appears to be light bouncing between the UV filter and lens. Please see photographs above. The first is taken with the UV filter on and the second without it. Both images are reduced in size to make handling a little quicker. Focus is set on the tall hotel building. Hand held - no tripod.
Once again many thanks for your interest.
John
This has been so very interesting and constructive. Thanks for the opportunity for learning. I was wondering why would you use a UV filter on a night scene. At some point I purchased a set of filters and whereas I could see the effects of the polarizing filter and of the ND filter, I could not see what the UV filter is useful. I had it on, for a while, for protecting the lens.
To answer your question, I have a UV filter on all my lenses purely for protection and to keep dirt off the lens. Obviously a lesson to be learnt in this case particularly as the shot was taken from my balcony, so not really much risk to the lens.
I spend a good deal of my time in South East Asia, where it can be hot but damp due to high humidity. My place out here is not far from the coast with a sandy beach. I value the protection a filter gives. That said clearly there is a quality issue particularly in the dark. I will have to remove the filter for some shots but overall I would be reluctant to abandon them.
I took a very similar shot this evening with my Canon EF 24-70mm f/4L IS USM with a filter fitted. The result is as above. The lens used in the original shot was a 1.4 50ml Canon EF lens. On checking the filter on this 50 mm lens I found it is a PhotR UV filter.
I am thinking now it is that particular filter that is the cause of the original problem.