I'm with Doremus. Looks a little like a light leak to me.
I'm with Doremus. Looks a little like a light leak to me.
The circular screw-in lens hoods are better at protecting lenses than preventing flare. Rectangular hood and filter systems like the Ambico may work somewhat better if one is available in a large enough size.
After digging an Ambico and a Lindalh lens hood out of storage, they and the old Sailwind brand appear to be too small for the Nikkor W 300/5.6 lens. Too bad -- the Lindahl system https://www.bhphotovideo.com/FrameWo...05ProAccys.pdf pages 247-253 was comprehensive. The largest filter thread adaptor was 82mm, and the hood would likely vignette on the Nikkor.
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