View Full Version here: : Venus Transit CaK
07-06-2012, 09:52 AM
Sydney weather was terrible, so.....Went way out west! :)
...and got some good data (white light, calcium and H-Alpha)
Here is the Cak link (http://www.atscope.com.au/BRO/gallery162.html)
07-06-2012, 09:57 AM
Wow – what a dramatic view. Nice work Peter, glad you were able to make the trip out west to provide us with this fabulous and somewhat esoteric shot of our solar power house, along with the lovely goddess Venus. I was expecting something good from you and this shot has exceeded those expectations!
07-06-2012, 10:02 AM
Lovely work Peter!
07-06-2012, 10:38 AM
True, that is awesome through the CaK, wondering what type of camera you used as I tried imaging with a Cak a yr ago but couldnt, Lol , , ? Dig the detail you have in this, Coool as !
07-06-2012, 10:44 AM
Breathtaking! Congrats, Peter.
I notice you have a slight halo around Venus, too, like pretty much of the other images I've seen (including mine). This makes me think that it isn't just an imaging or processing artefact but that there is actually some flaring going on around Venus' atmosphere?
07-06-2012, 11:04 AM
I would expect to see 'ringing' because of the sudden luminance change between the edge of Venus and the brightness of the Sun in the background. I'd put it down to processing or cameras struggling to cope with the edge luma change.
07-06-2012, 11:08 AM
Thanks Dennis, looked long and hard at the forecast, and finally chose Wagga Wagga. Easy drive down the Hume. The hard bit was packing all the gear. (attached pic)
Thanks Mike...more to come
Ta. Any mono cam should work fine.
Thanks Almost certainly an artifact... but will have a look
07-06-2012, 11:19 AM
A trip well worth it - fantastic!
07-06-2012, 11:59 AM
That's the nicest image I've seen so far. Great work!
Wonderful work Peter
You've definitely captured the majestic beauty of the event.
07-06-2012, 12:30 PM
Awesome stuff. Stunning. I want a CaK filter!
Yes ... well the table and chair could perhaps be a little more compact. :P
07-06-2012, 12:44 PM
fascinating image Peter - top quality as well. Regards ray
07-06-2012, 01:20 PM
That is so humbling.
Magnificent work, Peter.
07-06-2012, 01:56 PM
07-06-2012, 02:05 PM
Ah thought you might come back with something from your trip west. Should make for interesting results in a week or two I would think. Like seeing CaK images.
07-06-2012, 10:08 PM
Great shot Peter. Well worth the effort.
07-06-2012, 10:15 PM
Lovely image Peter. Nicely done!:thumbsup:
07-06-2012, 10:47 PM
Thanks..might still need some tweaks
Ta..yep very glad now I made the trip
Thanks Paul, CaK is great...much easier than Ha.
Nah...would have been better had Sydney been clear :)
Glad you like it
Table and chair courtesy of the motel. CaK? Get one! Cheap as chips :)
07-06-2012, 11:07 PM
great work peter - it was well worth the effort and the trip
08-06-2012, 10:43 AM
What a striking image Peter,
There have been some stunning images posted but for me, this is really a standout.
08-06-2012, 11:22 AM
For the ignorant among us (i.e. me), could you explain the use of a CaK filter? Is this another type of etalon used instead of the H-alpha one on a solar scope, or is it used in conjunction with a white-light full-aperture filter (such as Baader film), like a solar continuum filter?
EDIT I was assuming the former but the "cheap as chips" made me suspect the latter.
08-06-2012, 01:45 PM
Lunt make a module you use rather like a star diagonal.
You can read about them here
Glad you liked it trevor.
09-06-2012, 10:56 AM
umm, yes well this is simply superb Peter. Lovely view.
10-06-2012, 10:54 AM
Thanks Ted. The CaK is a nice alternative to white light as is shows more of what's going on in the lower chromosphere.
10-06-2012, 12:52 PM
12-06-2012, 06:45 PM
Love that disc. The texture is amazing. :thumbsup:
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