For this session I used a Voigtlander 15mm f4.5 wide-angle lens and encountered a number of issues.
The major issue was what I first thought was dust on my sensor. However, I eventually discovered that there is debris within the lens that I cannot remove. All evidence now leads me to believe that the lens had inclusions since day one.
The lens does appear to work well outdoors [much better than indoors].
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