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Posts posted by cjbrankin
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Many thanks abram
Clear Skies
Chris
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Hi and back to July when Saturn (and Jupiter) were better placed for observing than now.
Attached is a short clip of Saturn captured on a Samsung Galaxy S6 through a 6mm eyepiece on a 200mm Dobsonian mounted Newtonian telescope.
SIRIL was used to stack the frames and tweak the final image which is also attached.
Clear Skies
Chris
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Thanks again for your interest and comments Dave and all the best to you too
Chris
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Hi again Dave
So to cut a long story short I have two laptops, one runs Windows and the other Ubuntu.
It occurred to me last night that I had done my startrailing stacking on the Windows laptop last April and sure enough there in the recycle bin were the subs!
So I can oblige your request and shown below is the full stack complete with two vapour trails!
Sods law dictates that one went straight past the pole star .. while as you can see the other leaves like a scratch running down from the top just left of centre.
It is a moot point whether to keep the vapour trails or to have the gaps in the star trails. I prefer the gaps especially in this case where the region around the pole is effected.
Cheers
Chris
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Hi Dave
Many thanks for your kind comments.
Before I stacked the images I scanned through each one looking for any trails and found only two or three . I then removed these before stacking the rest (you can see the little gaps in the trails where an exposure was removed).
I never stacked the whole lot so don't know what it would look like.
Now once I am happy with the stack I usually dump the subs in the recycle bin, which I rarely empty in case I want to try again. Unfortunately on upgrading Ubuntu my recycle bin got emptied so although I'd be happy to try a full stack I can't!
So sorry I can't oblige Dave.
Chris
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Hi Everyone
At least the lockdown meant that very few planes were flying and leaving behind vapour trails which are liable to spoil astrophotos.Here is a one hour's worth startrail (13s exposures) with only a very few frames spoilt in this way and which were left out of the stack.
Taken early in the lockdown on 11th April.
Chris- 10
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Hi
Back again, this time to late May and a short clip of a lovely First Quarter moon captured with a Samsung Galaxy S6 through a 25mm eyepiece on a Skywatcher Evostar 90.
An added bonus was being serenaded by a blackbird which sang throughout the lockdown.
Chris
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Hi Everyone
Back to the 24th April and early use of Samsung Galaxy S6 to capture a 30s clip of the naked eye double of Mizar (left) and Alcor (right) in The Plough's handle.
Mizar itself a lovely double.
Shot through 25mm eyepiece on a 200mm Newtonian.
Clear Skies
Chris
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Thanks Harshn.
The adapter is just a bog standard plastic smartphone adapter off ebay for about a tenner.
Set phone camera to Manual Focus at infinity and low ISO cos Mars bright.
With the phone attached to the eyepiece via the adapter, mount on the telescope and use eyepiece focusing control to finetune the focusing.
Record video clip for as along as suits (my scope is Dobsonian mounted so Mars drifts across field of view in a few seconds!).
Then preprocess (PIPP) and process (SIRIL) and postprocess (GIMP) as described above.
NB The clip and stacked image both show Mars as a nearly white blob but CURVES and LEVELS in GIMP rescue the detail.
Clear Skies
Chris
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October 25th partial eclipse first contact to around mid-eclipse
in Imaging - Smartphone / Tablets
Posted
Hi
Some images of the eclipse were captured using a samsung galaxy s6 attached to 40mm eyepiece on 90mm skywatcher refractor. The file of images was then put into slideshow mode and the screencast captured to show the eclipse progress. Unfortunately the time interval between images was not regular and neither was the exposure.
Cheers
Chris