Hi res H-Alpha solar disk

[Peter Ward]

H-Alpha sun March 13th 2011 with the venerable AP130 F6 :)
(one of AP's finest)

Image can be seen here (http://www.atscope.com.au/BRO/gallery84.html)

[seeker372011]

a fine image

[DavidU]

Very nicely done. Huge image with a wealth of detail.

[John Hothersall]

Blimey that contrast is amazing Peter.

John.

[Derek Klepp]

Great Disc Peter is that single or double stacked?

[telecasterguru]

Peter,

A fabulous image but could I be so ignorant as to ask why the prominences don't show? I think that's what those giant loops off the sun are called. I'm only new to this solar game.

Frank

[Peter Ward]

Thanks for the feedback guys. I'm using a Coronado 90mm double stack system these days.

Frank, the proms are there, but don't show in this image as they are a good deal fainter than the disk....and would have required another exposure run.

[Paul Haese]

Nice Peter. I take it that this is a mosaic? It shows a great deal more detail than you previous image.

[Peter Ward]

Thanks ! Yes the mosaics are a little frustrating as the seeing does cause subtle variations in the level of detail.... but a run of clear weather would help !

[Paul Haese]

Just a question Peter. When doing mosaics do you keep the gamma at the standard level for the lumenera or i fyou changed it how did you get around the subtle changes in illumination? I have been struggling with this on mosaics for a long time. Doing a simple two panel mosaic is fine but larger ones require hours of dodge and burn to control the differences in each panel. In other words I cannot control it as yet.

[Peter Ward]

I vary it depending on the detail I'm trying to capture....but I'm also comfortable in working with Photoshop layers in getting the blend to look reasonably smooth..."work" being the operative word ;)