Why The Colour Shift?

I was at the Fitzwilliam Museum here in Cambridge a few days ago and happened to look up. I may have looked up and seen the ceiling and the cupola before, but if I did then I don’t recall doing it.

I took two photographs within a few seconds of each other. I used the same camera for both shots. I had the camera in Manual mode. And because the scene was dark and I didn’t want to bump up the ISO, I took two shots with different shutter speeds. The first was 1/125th of a second. The second was at 1/15th of a second.

I knew that the shot at 1/125th of a second would produce and image that was too dark but I had the idea of opening it up in post processing or perhaps combining the two photos in post production by layering them in Photoshop.

Yes, I know – that was a very badly thought out idea. But I was sat on a bench and braced against a column, and that’s what I did.

So far so good.

I processed both images in Capture One 20 and here are the two photos.


Why is the cupola in the 1/15th second shot blue and in the 1/125th second shot it is gold?

Cupola in the Fitzwilliam Museum in Cambridge at 1/15th second
Cupola in the Fitzwilliam Museum in Cambridge at 1/125th second


  1. writemeow says:

    That beats me. It looks as if the whole White Balance is different. The first one is much more pleasing to the eye … at least my eye 😊


    1. Me too, I like that one better.


  2. Each catches, is stressing different light: the gold from inside and blue outside.
    To know for certain, just look at where the gilding glows most in each shot… Natural lighting from above catches the top; while interior highlights and magnifies from all the gold below; )
    In spite of being taken in the same position, they both give an interesting and very different perspective because of this effect. Well done!


    1. Well thank you for the nice comment.

      Liked by 1 person

  3. JenT says:

    Which is closer to what you saw with your eyes?


    1. Good question, and I don’t know. I will look next time I go. Thanks for the prompt.


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