North America widefield

[RobertM]

This is a single frame from my holiday, unfortunately the clouds rolled in and this is as far as I got with this one.

Sony A7s, RH200 30s@ISO2000, no darks, flats or bias, all processing in PI.



Warts here: https://farm8.staticflickr.com/7770/18070297536_afb213506d_o.jpg
Yes there was quite a bit of NR.

[Kenny]

Brilliant image Robert.

Warts here: https://farm8.staticflickr.com/7770/18070297536_afb213506d_o.jpg
Yes there was quite a bit of NR.

I don't see any warts.

[RobertM]

That's very kind Kenny but there is so much wrong with it.  I posted more as an example of what the can be achieved with a single short sub plus I was trying different techniques in Pixinsight.  I would not normally post these but I was surprised how much information there was.

[JohnP]

what was the lens?

[RobertM]

what was the lens?

It was a 600mm f/l f/3 telescope.

[MarkS]

Single frame?!?! 

Wow. I'm really looking forward to trying this myself with the A7S!

Mark

[RobertM]

Single frame?!?! 

Yes single frame with the target 30-40 degrees above the horizon.  I'll post other shots as they are processed.

[Fay]

well that looks good Robert!!

[RobertM]

Thank you Fay

[Carole]

Amazing for a single 30sec sub and I presume unmodded. 

Carole

[RobertM]

It sure would be amazing if it was unmodded but alas it was modded (all filters removed).

[Carole]

Ah, was just going by the colour.

Carole

[RobertM]

Anything in particular about the colour ?

[Carole]

It looked like the pale colour of the unmodded DSLR images I have seen that's all.

Carole

[RobertM]

That's my naive attempt at processing.  My DSLR workflow is giving me a lot of trouble - something I'm still getting to grips with in PixInsight.

[Fay]

How long an exposure would you have to do with a 7.5 scope to get same result, Robert?

[RobertM]

Something like about 7 times but you would need extremely well corrected optics to make full use of the sensor size.