Fisheye of whole sky

[MarkS]

A quick proof of concept tonight taken with my Christmas present - a Samyang 8mm f/3.5 UMC Fish-eye CS II lens.  I put it on the Sony A7S and in the "long" direction it gives a 180degree view.  Combining 2 single exposures (30sec each at F5.6) - one oriented East-West and one oriented North-South gave the following:



Full size version here:  http://www.markshelley.co.uk/Astronomy/2018/WholeSky20180107_100.jpg

I managed to catch this just before the clouds rolled in.  Also, I had to duck down below the level of the tripod to prevent me appearing in the image!

Mark

[Carole]

Brilliant Mark.

I spy with my little eye, Orion rising and the Pleiades.

I had to duck down below the level of the tripod to prevent me appearing in the image!

Ha ha.

Carole

[JohnP]

Nice Mark - Excellent way as well to identify which direction the worse light pollution is in... enjoy & look forward to seeing some stunning images from your new lens. John

[Mac]

Interesting image.

Mac.

[The Thing]

Neat. Beats a QHY5L-II with fisheye as there just isn't enough resolution to get all those stars. Nice orbits as well. I thought east was Ashford? I would've expected to see more LP than there is in that direction.

[MarkS]

Yes, Ashford is more or less East but the main light pollution comes from Maidstone in the North West.  That evening the sky was a bit murky so there could be some more local light pollution being added in as well.

I'll repeat this experiment on a night with good sky - I expect there will be a significant difference.

Mark

[Mac]

Would it be worth raising it on a pole to above the height of the house?

Or would the reduction of the house ect be negligible.

Mac