PST Artifact?

[Photosbykev]

any thoughts on the cause of the slightly darker rim that is right on the edge of the limb between the surface detail and the base of the prominences?

The rim is visible in the 15 second video before processing and the image shown has been pushed through Registax6 using 10% of the best images and then stacked and wavelets applied. No other processing has been applied.

Image is from a PST and DMK41 CCD camera.

[hunterknox]

Isn't that just the chromosphere?

[markt]

Yup, the chromosphere! Good capture!

[Photosbykev]

Thank you gents, I was seeing it a lot and wasn't sure if it was a 'feature' of the PST tuning.

[hunterknox]

On my first Ha imaging run I spent ages trying to focus my PST properly so that line would disappear!

[Photosbykev]

On my first Ha imaging run I spent ages trying to focus my PST properly so that line would disappear!

I've been removing it in post processing !

[markt]

Lol, that's funny!

Incidentally Kev, what image format are you saving your images from Registax in?

[Photosbykev]

Lol, that's funny!

Incidentally Kev, what image format are you saving your images from Registax in?

I always save in 16-bit Tif format from Registax6. If I was using a DSLR it would be captured in Raw format then converted to 16-bit Tif. I stay away from jpg until I need an image for use on the web.

[Merlin66]

The spicules at the edge of the disk are real. They provide a good method of checking final focus and seeing conditions.

[Montana]

A very fine spicule layer! shows first class imaging and processing.

Alexandra