Saturday 22nd June

[Montana]

On Saturday after getting back from the BAA in Manchester the clouds parted very briefly so I was able to snatch just a few images. It was very windy and I had only small gaps but enough to capture 4 one minute avi to get a full range of disc features. The PST is really the best in the world for very quick captures in terrible conditions. So I present my first glimpse of the Sun for 2 weeks.

CaK PST / DMK41

2013-06-22 16-56-09 f colour by Alexandra's Astronomy, on Flickr

Hydrogen alpha PST (single stack)

2013-06-22 17-34-31 f colour by Alexandra's Astronomy, on Flickr

and double stack

2013-06-22 17-36-49 f colour by Alexandra's Astronomy, on Flickr

and prominences

2013-06-22 17-31-11 f colour by Alexandra's Astronomy, on Flickr

I hope we get some better weather soon.

Alexandra

[JamesF]

Lovely images, Alexandra. Particularly nice to see a CaK image. They seem to have been a bit thin on the ground of late.

James

[Davie27]

thanks for sharing. Amazing

[allcart]

Good stuff Alexandra the cak image is spot on. Bet you were glad to get a few in the bag.

[David Smith]

Lovely images. Nice to catch some rays

[michael.h.f.wilkinson]

Great images again. You seem to squeeze as much detail out of a PST as many others manage out of an LS60 double stack!

[Bizibilder]

Very nice - especially the single stack Ha shot which seems to have the sharpest detail.

[DrRobin]

Nice images from a very brief session, I see your double stack has lost its ghost image. By the way what exposure do you use?

Robin

[Steve Ward]

Great to see you back in action Alexandra . . . .

[Polar Bear]

Inspiring images , the CaK is amazing, thanks for sharing.

[Montana]

Thanks guys

Robin, I think the missing ghost was because it is not quite on band (optimally), I only had enough time to hit record after putting it on. Then in the next brief gap I thought I would optimise it, then no other gap came along and I gave up. So it was luck really that the ghost isn't there, so it must be slightly off band somewhere. For the single stack I use around 1/625 to 1/455 depending on the weather, then the double stack reduces it down to 1/70 to 1/120 somewhere around that.

Alexandra

[DrRobin]

Thanks Alexandra, I have just had a fiddle with the camera settings and ended up with pretty much the same settings. I am trying to set a shorter exposure for the 1.5x double stack to reduce blurring caused by the atmosphere, that means upping the gain, but with stacking the noise should be reduced.

Robin