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View Full Version here: : Venus Mar 19 - IR & UV


lepton3
19-03-2012, 09:00 PM
Seeing was quite good at 6:30pm this evening, but incoming clouds limited me to one IR,V,UV set. However it was the best UV channel so far!

Here's the synthetic colour image, again credit to Nick for the colour scheme.

-Ivan

DavidU
19-03-2012, 09:11 PM
Nice & sharp:thumbsup:

Matt Wastell
19-03-2012, 09:15 PM
Hi Ivan - another super image - the cloud banding is cool! Well done Nick too!

Shiraz
19-03-2012, 09:38 PM
what a cracker of an image Ivan. regards ray

lepton3
19-03-2012, 10:51 PM
Thanks David. Focus is always hit and miss with the U filter, but with this evening's seeing I was actually able to see a bit of the banding in the live feed, so focus was possible.



Thanks Matt (from both of us).



Glad you like it Ray, actually I'm pretty pleased with this one too. Definitely my best result with the IR & UV filters so far!

-Ivan

cydonia
20-03-2012, 08:17 PM
nice image there. Can you explaine the steps involved in creating these colour UV images please?

Deeno
20-03-2012, 08:40 PM
Superb!
Can't remember ever seeing so much detail in the cloud banding on Venus

lepton3
20-03-2012, 08:50 PM
Nicolae,

I use a mono camera, and shoot three videos through photometric I, V, and U filters. Stack and sharpen each video, then combine them as RGB channels into a colour image, using I for R, V for G, and U for B. I use Gimp software, loading the three grayscale images as layers then using the Colors->Colorify function on each layer.

I have also seen others get good results shooting R, G, B, and U, and then making an LRGB image but using the U for L. I am going to give that a try next time.

There are a few special purpose "UVenus" filters on the market, which I think are a bit brighter than the Bessel U, but with a C11 and DMK21AU04 camera I still get 30 fps for U, even at f/25, so it's OK (but less than 50% histogram).

-Ivan

astronobob
20-03-2012, 09:18 PM
An amaizing View Ivan, 1st image of Venus with colour I've seen .
very impressive ! !

Derek Klepp
20-03-2012, 09:22 PM
Thanks Ivan good to see one of the other Planets getting some attention.

John K
20-03-2012, 10:09 PM
Sweet image, heaps of detail!

lepton3
21-03-2012, 07:31 PM
Thanks Deeno. This was the best seeing I have had during the daytime for a long while.



Thanks Bob. Of course it is synthetic colour, but I like to think it's how the Venusian's see their own planet from space!



Cheers Derek, I agree. I love a good Saturn as much as anyone, but it's a shame Venus and Mercury don't get much of the spotlight. I suppose it's because the timing is a bit tricky, and it does require a bit more specialised gear.



Thanks John. Good luck on your imaging too!

John Hothersall
21-03-2012, 08:15 PM
Very good cloud contrast and UV/IR give fine depth, Venus a bit too low at 20 degrees but great to see it this detailed here.

John.

desler
21-03-2012, 10:23 PM
Thanks for the view Ivan, rather special!

Darren