AR1032 - 02 January 2010

Decided to try and take advantage of the sunny morning and capture some images through my PST CaK.
Below is an imahe taken with the DMK camera @ 60fps.
Total of 1000 frames captured and then processed in Registax 5.

Looks real good Michael , I must take a peek before it vanishes.


Deirdre Kelleghan
Vice Char IFAS
Outreach IFAS
www.irishastronomy.org/
www.deirdrekelleghan.com/
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Wow. nice work!
I wouldn't be able to stop myself from adding a yellow tint to it!

Very interesting, its looks alot better then what I would expect from a same sized H-alpha PST, do you find that the Cal-K gives consistantly better images photographically or is the better camera?

To be honest Dave, I haven't gone imaging with it too often, only a few times.
Srange thing with this scope: for an imaging scope, the DMK (and Toucam IIRC) do not come to focus with it directly.
You need a barlow to bring it to focus. Strange! However, to get decent detail you need a use a barlow anyway in my opinion
Some people have unscrewed bits off their PST Ha near the eyepiece to bring it to focus - this doesn't work with the CaK due to the multiple filters which are used.

In terms of image quality, the two frequencies (CaK and Ha) are quite different.
The width of the bandpass for the CaK is actually much wider, so one would think it would be more subject to atmospheric distortion.
Also, visually, its a much fainter image.

However, after having laser eye surgery a few months ago, when I looked through the CaK scope today, the image did seem noticalbly brighter (albeit still fainter than Ha) and the AR region was visible. However, each person's eyes are different. For some, the image is very easy to see, but for others it is invisible.

Barberskum wrote:

Wow. nice work!
I wouldn't be able to stop myself from adding a yellow tint to it!

Actually I considered it.
I also considered adding a blue tint to reflect that is a CaK image.
In the end, I just went with mono and keep it simple.

Guess I just have to win a colour DMK camera at the next Burren Star party....