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Old 13-09-2020, 10:13 PM
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RyanJones is offline
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 1,087
So I think the Iris looking spikes are a different issue all together. Normally the shape of defraction lines are a product of the shape of image train or the shutter on the camera. You’ll often notice a TV camera looking at a bright light will produce a hexagonal pattern, newtonian 4 vane secondary spiders produce a cross and even your eye lashes if you squint looking at a light will produce their own unique multi spike pattern. It is possible that the iris pattern in the halo is actually quite normal for your particular camera but it normally wouldn’t be evident because the halo would be so significantly smaller. If it were me, I think my process of diagnosis would be to deal with the size of the halo first by way of UV and IR filtering and then reassess the pattern within and see if it still is significant enough to worry about.

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