NGC6888 widefield

[steviemac500]

A widefield shot of the Crescent. This is a 6 panel mosaic consisting of 5hrs in Ha and O3 in each panel giving a total integration of 60hrs. The mosaic was constructed in APP and then processed in PI minimally with a little noise reduction and then colour combined with the standard mix. I added the Ha layer back in PS to bring back some of the detail. I have attached the Ha as I like it too!! Hope you like them, C & Cs welcomed as always!

https://astrob.in/mcv66q/B/

Steve

[steviemac500]

A friend of mine has asked why there are spikes on some of the stars. I’m assuming it’s something in the processing and my money is on deconvolution but I’m not sure. Any ideas?

[Davey-T]

Could be micro lenses on the sensor.

Dave

[steviemac500]

19 minutes ago, Davey-T said:

Could be micro lenses on the sensor.

Dave

Thanks Dave, the camera has been recently serviced so I’m not sure it’s that. It’s only on the bigger stars too. 

[Davey-T]

36 minutes ago, steviemac500 said:

Thanks Dave, the camera has been recently serviced so I’m not sure it’s that. It’s only on the bigger stars too. 

It's a normal cosequence of the sensor construction, not a fault.

Dave

[Laurin Dave]

Great image and mosaic...  Its the micro lenses on the KAF8300 sensor .. quite normal on brighter stars

Dave

[Astroscot2]

I can just make out the soap bubble, very nice image.

Mark