Recent Posts

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21
Astrophotography / Re: M20 reprocess using Mark's star colour treatment
« Last post by Carole on Oct 17, 2017, 20:28:08 »
Thanks to you Mark.  Quite chuffed with it now.  Am now looking for other old data to improve on.  Ha ha.

Carole
22
Announcements, Meetings, Events / Re: Next DSC 20 - 22nd October
« Last post by Carole on Oct 17, 2017, 20:26:32 »
Brian as in Brian Weller?

Will be great to see him, all members are welcome.

Starting packing already.

Carole
23
Announcements, Meetings, Events / Re: Next DSC 20 - 22nd October
« Last post by MarkS on Oct 17, 2017, 19:44:32 »
I hear Brian is planning to breeze along, uninvited?

Mark
24
I like that - it certainly is colourful.

Maybe the background is a bit too black.

Mark
25
That's fantastic now!  The colours look perfect.

Mark
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Astrophotography / Re: M20 reprocess using Mark's star colour treatment
« Last post by MarkS on Oct 17, 2017, 19:41:18 »
That's come out really well!

Mark
27
I've always dreamed of being able to produce an astro photo as colourful as this.

As with the M31 image, this wasn't an ideal night and when these subs were taken the streetlamps were still on. I didn't use a light pollution filter.


10 x 300s @iso1600
Image date, time and location:   14-10-2017 22:30:00, Manche, France
Telescope aperture and focal ratio:   Teleskop Service TS1506UNC 6" f4, TS KomakorrF4
Camera and filters used:   Canon1100D defiltered, Astronomik UV/IR Cut Clip Filter
Processing applied:   Pixinsight BatchPreprocessing, PhotometricColorCalibration, Arcsinh Stretch, MSLinTrans, Gimp Levels, colour, noise and unsharp mask


28
Astrophotography / Re: M20 reprocess using Mark's star colour treatment
« Last post by Carole on Oct 17, 2017, 17:47:41 »
Thanks Duncan, yes he certainly is and generous to share his expertise.

I don't know why the first time around I was getting brown bits round the nebula where blue bits ought to be.

Carole

29
Nice Image
Mac.
30
Technical / Re: QHY8L with a Rokinon 16mm F2
« Last post by Mac on Oct 17, 2017, 17:27:03 »
if you look at your camera you will have the focal plane marked on it, normally a circle with a line hthrough it, this is where your (film) sensor is.
The distance from that point to the front of your lens can be measured with a ruler.
If you then fit it to your QHY and make sure the distance from the sensor to the front of then lens is the same you can use this as a starting point,
You might find that you will have to move it a few mm either side.

One other thing, do it in daylight, much easier to set up and adjust.

Mac.
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