A very active Sun - 24 April 2014

[MGTechDVP (Mariusz)]

Hi All,

Just sharing some images I composited today. Had to image the Sun after seeing a lot more flares around the solar edge then before.

I Don't know why I'm getting a moire effect on the F30 pictures, I suspect, correct me if I'm wrong, it's the fact that the DMK41 has no low pass-filter before the sensor and at that focal length the difference in focal points on the Solar sphere is enough the have the central part (closest point to the CCD) slightly out of focus, resulting in the effect.

Clear Skies,

Mariusz

[GC - South Aus]

Once again great work.

Very envious.

Regards

Gav

[JB80 (Jarrod)]

Nice pictures of an active Sun.

The Newton rings tend to crop up when using a barlow on the DMK41. I believe it's the glass that covers the sensor that is the main culprit as with a barlow two pieces of glass close together cause the issue. It's more a reflection thing.
If you have another barlow you can try that. I haven't had these issues yet with my DMK41.

Other solutions can be to take flat frames, slightly tilt the camera in the holder or to have a slight drift of the Sun across the screen.

http://en.wikipedia.org/wiki/Newton's_rings