| Joined: | Sun Apr 1st, 2012 |
| Location: | Carthew, Cornwall, United Kingdom |
| Posts: | 6829 |
| Status: |
Offline
|
Eric wroteJonathan, It's interesting that you said the hotspot wasn't too bad using the external filter. Clearly putting the filter inside is exacerbating this effect.You could compare a few shots with and without an external filter. A 720nm shouldn't effect your exposure very much and it may reduce the hotspot.
That would be an interesting experiment.
____________________
Still learning after all these years!
https://nikondslr.uk/gallery_view.php?user=2&folderid=none