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ChrisM
29-03-2015, 12:13 AM
Just arrived home from Spitsbergen (largest island in Svalbard) last night, so starting to look at 3,500 images taken over a period of a month in the Arctic.

As Joe said, the -25 C temperatures made photography difficult for both the equipment and the operator. I had trouble focusing on at least one occasion, and I didn't take nearly as many images during totality as I had intended. My water bottle froze in my pocket, so imagine how cold my fingers felt every time I took off my outer mitts!

However, in clear skies and great scenery, the eclipse was beautiful. Just as the Moon looks bigger when it's near the horizon, the Moon and Sun at totality looked bigger to me than I recall them looking at Palm Cove in 2012. Shadow bands on the snow were very evident.

Due to weight limits, I limited myself to two DSLRs and two lenses - no telescope this time. Nikon D7100 with 17-55 mm f/2.8, and D7000 with 70-200 f/2.8

The first image below is from a single exposure: 1/15 sec at f/6.3 and ISO 250 at 200 mm. The image is cropped and has a few minor adjustments made via Lightroom.

The other images show:
- the diamond ring (1/250 sec, f/6.3, 200 mm)

- the mass gathering of about 300 people -approximately one third of whom had not witnessed a TSE previously. Note the large marquee.

- general scene about 5 minutes before totality

- general scene during totality. Jupiter can be seen at top left, and lights on the mountain-top mine can be seen also.

- view behind me during totality (towards higher mountains)

Our eldest son said that he'd pay me $1 if we saw an aurora during totality. Well - we didn't; there was a lot of reflected light from the snow, so it didn't go nearly as dark as it did during totality in 2012. But we got to see some great aurorae in the preceding weeks; the brighter ones would easily have been visible during totality had they been there.

Cheers, Chris

Nico13
29-03-2015, 12:20 AM
You lucky lucky bugger.
Great captures, glad you had a good trip.

Akwestland
29-03-2015, 01:35 AM
Chris,

Fantastic images. They are wonderful.

I am wondering where you are in Gippsland as I am a fellow (East)Gippslander.

Cheers,
Andrew.

OzEclipse
29-03-2015, 01:45 AM
Fantastic image Chris. Great dynamic range. Looks like a composite.

Congratulations.

Joe

Tamtarn
29-03-2015, 08:33 AM
A fantastic set of images, the diamond ring is outstanding!! :thumbsup:
Barb

Retrograde
29-03-2015, 12:16 PM
That's awesome. I reckon the difficulty of location/observing just adds to the experience :thumbsup:

ChrisM
29-03-2015, 01:30 PM
Thanks Andrew - Latrobe Valley. Might I have met you at Barry's at Perry Bridge?



Thanks Joe, but mine doesn't have the fine detail that you've teased out. I virtually always shoot in uncompressed 14 bit RAW, so there has to be some compensation for 30 Mb files!



Thanks Barb - without any scientific approach to timing, it was almost pot luck that I got that shot. The whole totality seemed like it lasted less than 10 seconds (even though it was about 2.5 minutes)



Thanks Pete - any excuse to go to the polar regions! It will be an eclipse that's hard to beat.

Chris

ChrisM
29-03-2015, 01:34 PM
Thanks Ken, it was a great trip, with plenty of time for aurora chasing (or spotting) too: See http://www.iceinspace.com.au/forum/showthread.php?t=133239 for a few pics.

Chris

RB
29-03-2015, 02:52 PM
Wonderful!
Congratulations Chris, what an awesome experience that would be.

RB

RickS
30-03-2015, 09:18 AM
Great shots, Chris! The Larson-Sekanina filter algorithm is a good way to bring out detail in the corona.

Cheers,
Rick.

prokyon
30-03-2015, 11:14 AM
What a great compilation, thanks for sharing!!!

strongmanmike
30-03-2015, 11:25 AM
A very realistic image of the Corona and one of the best diamond ring effect shots I have seen - lovely work Chris, well worth freezing your bobbles off for, what a unique environment you were in :thumbsup:

Mike

multiweb
30-03-2015, 12:21 PM
Beautiful shots. Nice to see the crowd and location as well. :thumbsup:

ChrisM
30-03-2015, 11:58 PM
Thanks Rick - Is that one available in PI?



Thanks Werner - We were fortunate to be able to travel to this remote location and I'm more than happy to share with others.



Thanks Mike - and yes it was unique. We didn't hear the birds before, during or after the eclipse, because there are any this time of year. The diamond ring shot was straight off the camera; just fluked the star effect I guess from the aperture chosen?



Thanks Marc - I think the location and crowd play a large part in any eclipse memories!

Cheers, Chris

RickS
31-03-2015, 08:46 AM
Quite a few astro image processing packages include an implementation of Larson-Sekanina, including PI. It is commonly used for bringing out fine detail in comets.

Cheers,
Rick.

Paul Haese
31-03-2015, 09:45 AM
Well done Chris. Too cold for us for this one. The Corona has taken on another shape from 3 years ago and it's very different from 2009. Great capture of the event.

ChrisM
05-04-2015, 09:12 PM
Thanks Paul.

Since the Sun rotates once approx every 25 days, wouldn't its corona potentially look different depending whereabouts in that cycle we viewed it?

Chris

OzEclipse
11-04-2015, 01:34 AM
Yes, Chris, you are correct that Solar rotation and orientation changes the appearance. The corona is incredibly dynamic and changes on hourly and daily scales. CME's [coronal mass ejections] and the twisting and writhing of the Sun's magnetic field changes the appearance of the corona on even shorter timescales.

The solar sunspot cycle changes the macroscopic structure of the Sun's magenetic field. This then shapes the corona appearance from quite radially symmetrical at sunspot max to one that has large broad equatorial streamers and short polar brushes at solar min over the 11 year sunspot cycle. There is typically nothing that changes fast enough to be observed during the few minutes of a total eclipse.

If you want to see the corona in action, the SOHO site has an animation tool -

http://sohodata.nascom.nasa.gov/cgi-bin/soho_movie_theater

choose a product -
the two corona cameras take an image every 12 minutes. The cameras are LASCO C2 meduim field and LASCO C3 wide field.

choose LASCO C3.

I suggest you choose the this range of dates
2015-03-15 to 2015-03-20

and watch it.

Joe

ChrisM
11-04-2015, 11:16 PM
Thanks Joe - that animation was well worth watching once it loaded.

Chris