| Joined: | Mon Apr 2nd, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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I have managed to reproduce the hot spot effect you describe but only at f16 it is just visible at f8 and gone altogether with wider apertures.
The hotspot is present on both bodies but not as distinct on the one with the LPF removed. I will take a set with the IR camera then put them up here after lunch.
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Robert.