p.1 #1 · Weird Curved Sunstar with Voigtländer 10/5.6 Lens
I am getting really weird curved Sunstars with my Voigtländer 10/5.6 lens on my A7r.2.
Those curved rays seem most pronounced when the Sunstar is located near the left or right edges.
Images without the Sun in it seem fine.
Do I have a faulty lens? Or do other lenses exhibit the same effect? Your feedback, please. TIA.
I had sent J. Brian Caldwell (of Caldwell Photographic Inc. and optical designer of the Coastal Optics 60mm f/4 UV-VIS-IR APO macro lens) some of the pictures I will post below, asking him about his insight. Here is part of his response, quote:
"Sorry - I've never seen this before and really have no idea what causes it. Aside from the obvious fact that you've got 5 (or maybe 10?) iris blades. One potential clue to what is going on is that the radial spikes (the ones that would more or less intersect the center of the image) seem pretty straight."
I will now post several images showing what I talked about.
p.1 #6 · Weird Curved Sunstar with Voigtländer 10/5.6 Lens
K-H., I saw a similar phenomenon in one of my images from Vegas about a month ago. There was a sizable object near the light source, the sun, in my case and it seems like the trees (albeit two different ones) are very near those trees. Somehow, there is some kind of light bending action caused by those objects would be my guess.
p.1 #12 · Weird Curved Sunstar with Voigtländer 10/5.6 Lens
My guess is that the sunray is coming into the image, ie towards the camera rather than just straight across the frame like the nice straight lines of the architectural shots you're showing. As a result there's a magnification/curvature that happens as the ray gets closer to the camera.
