Sunset, Rhue by Arisaig

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I wouldn’t be the only person to favour Scotland’s west coast – its beautiful landscape, impressive geology.

After a day exploring outside and around Mallaig, I stopped at Arisaig to catch the sunset and was not disappointed.

First, a couple of obvious scenes at the end of the road, the low warm light skimming lines of rock

  • A favoured location – can’t beat a day on the west coast of Scotland, the beautiful landscape, impressive geology. After a day exploring, I stopped at Arisaig to catch the sunset and was not disappointed. This was an easy composition to find, the lines of psammite rock zig-zagging through the vertical frame, all illuminated by the bright warm/orange sunset light from the west.

I flew the drone a little way out over Loch nan Ceall for a more elevated perspective. The light was turning red, catching the rugged hills nearby

The view out west directly toward the setting sun was particularly impressive

  • A favoured location – can’t beat a day on the west coast of Scotland, the beautiful landscape, impressive geology. After a day exploring, I stopped at Arisaig to catch the sunset and was not disappointed. So I flew the drone out over some small islands just off the shore of Loch nan Ceall – the imaginatively named Sgeirean Buidhe (“yellow reefs”) and caught the sunset over Torr Mòr

The 360º panorama is one of my favourite art-forms: for best results, the optimum workflow is:

  • choose a location directly above some non-uniform structured area – not just directly above the sea but over a reef, so the panorama can stitch properly
  • think about the contrast-ratio from brightest to darkest areas of the scene; if the sun is visible, use a narrow aperture (f/10 or thereabouts) so the diffraction-spikes cling closer to the sun; choose an exposure such that the brightest part of the scene is just beginning to overexpose – typically you can recover 2/3EV highlights in post but the shadows get noisy fast and with a direct into-the-sun shot the shadow-side can easily require a 3EV shadow-lift
  • shoot RAW DNGs and ignore the JPEG
  • use RawTherapee to convert the JPEGs – apply lens distortion correction and a small amount of tonemapping, maybe even the dynamic-range-reduction module
  • use Hugin to stitch the panorama: optimize for position, barrel distortion and view but not translation; use equirectangular projection and auto-straighten; ensure the FoV is 360×180º (it may be out by 1, ie 179º); use blended+fused output for noise-reduction, unless it introduces stitching edge artifacts
  • finish, including toning and noise-reduction/sharpening, in darktable.

[sphere url=”http://soc.sty.nu/wp-content/uploads/2021/09/PANO0001-PANO0026-v2_blended_fused-0-0017-scaled.jpg” title=”Arisaig sunset over Loch nan Ceall”]

Finally, just as I started the return drive, the sky provided yet more drama to see me on my way:

  • A favoured location – can’t beat a day on the west coast of Scotland, the beautiful landscape, impressive geology. After a day exploring, I stopped at Arisaig to catch the sunset and was not disappointed – the sky provided these beautiful parting shots of the sunset fading to twilight just as I was driving away.
  • A favoured location – can’t beat a day on the west coast of Scotland, the beautiful landscape, impressive geology. After a day exploring, I stopped at Arisaig to catch the sunset and was not disappointed – the sky provided these beautiful parting shots of the sunset fading to twilight just as I was driving away.

A selection of the above photos are available on my gallery website as prints, cards, masks and other products: Arisaig on ShinyPhoto.

Loch Rannoch Sunset

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A few photos from Sunday afternoon’s explorations around Loch Rannoch.

We walked through the Black Woods; whilst flying the drone near Camghouran I discovered remains of a building – a pile of stones and hints of mounds in the earth possibly in the shape of a former but’n’ben croft? – in a clearing in the forest.

  • Walking along the path through the woods, one comes across this clearing just off to the south; quite photogenic from ground level, it becomes even more interesting from 100m up in the air as the beautiful pale tree is apparently stuck on the end of a pile of stome rubble, the remains of some kind of building.
  • The impressively tall fir trees of Camghouran / Croiscraig from above the Black Woods of Rannoch
[sphere img=http://soc.sty.nu/wp-content/uploads/2019/03/IMG_5574-360-fixed.jpg” ]

Sunset on the shore was beautiful; contrasting deep blue ominous dark blue clouds and vibrant orange sunset across the water.

  • Beautiful glowing colours: warm yellow, orange and red sunset light contrasting with the thick passing clouds near Camghouran, Loch Rannoch
  • Beautiful glowing sunset gold and blue colours, near Camghouran, Loch Rannoch
  • Beautiful glowing sunset gold and blue colours, near Camghouran, Loch Rannoch
  • Beautiful glowing colours: warm yellow, orange and red sunset light contrasting with the thick passing clouds near Camghouran, Loch Rannoch
  • Beautiful glowing sunset gold and blue colours, near Camghouran, Loch Rannoch

Prints of some of these photos will be available through my ShinyPhoto website: photos around Loch Rannoch.

Caithness Holiday Day 2: Whaligoe Steps and Camster Cairns

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Many moons ago… the parents and I were on holiday around Caithness and having trouble finding the way to Whaligoe Steps. As his tractor turned by the end of the field, we stopped a farmer to ask directions. To southern ears, the instructions sounded memorably like “turn right at the fussky-osk”. With a little thought we established the meaning… and twenty-two years later I still remember the turn of phrase and was pleased to identify the first phone-box in this Spring’s return visit.

Whaligoe Steps themselves are 365 steps down the side of a steep cliff to a former port for offloading herring boats; women would gut the fish and carry it up in barrels.

The place itself is quite an impressive geo with a fault nearby in the rock – strata lines pushed up by thrust – and pleasant views out to sea.

Further down the road are Camster Cairns – quite impressively large piles of rocks with interior chambers, perhaps the oldest buildings in Scotland at 5000yr old.

It had been another ludicrously hot day, with temperatures up over 25-28ºC, so we finished the day’s explorations on the north coast at the Slates of Fulligoe in East Mey, where the setting sun was partially obscured by a thick sea haar – very pleasantly cool.

 

This was the second evening I’d set out to make a timelapse of the sunset into dusk. At least this time I was prepared for haar coming in off the sea (chose a safer less-cliff-top location near the path back, for starters). It did not disappoint: over the course of an hour the sun moved, the waves came and went, and a huge bank of fog moved in transforming the scene from brilliant sunset reflecting on the water, to complete white-out. All the possible moods of the landscape in barely an hour – quite awesome.
This photo is a temporal flattening of a timelapse sequence – using the intervalometer to shoot HDR brackets 3*±1EV at regular intervals which can be made either into a timelapse video or averaged-out into a still, like this. (The sun itself is blended from fewer images to avoid motion blur.)

Caithness Holiday 1

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I had a few days’ holiday at the end of May.

The first day started in Perthshire and finished on the far north coast of Scotland – almost as far north as one can be – at St John’s Point, Caithness, looking north to Stroma and Orkney (disappearing as the distance haze turned to haar) and west to the setting sun.

Another day… another sunset

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“Slight chance of convective weather” is rapidly becoming my new favourite weather alert, especially coming at the end of the day where it signals turbulent blends of low sun, rain and thick clouds.
It doesn’t get much better than last night, either. With sunset happening just after dinner… perfect 🙂

And my favoured view of the receding hills into Strathearn was looking particularly lovely in orange-pink tones too:

Sunset and showers – beautiful warm pink light despite the rain pouring down.

Frame interpolation for timelapse, using Julia

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A long time ago I wrote a python utility to interpolate frames for use in timelapse. This project was timelapse.py.

Back in 2014 I ported the idea to the very-alpha-level language Julia.

In recent weeks Julia released version v1.0.0, followed shortly by compatibility fixes in the Images.jl library.

And so I’m pleased to announce that the julia implementation of my project, timelapse.jl (working simply off file mtimes without reference to exif) has also been updated to work with julia v1.0.0 and the new Images.jl API.

Usage:

zsh/scr, photos 11:32AM sunset/ % ls *
images-in/:
med-00001.png med-00022.png med-00065.png med-00085.png
med-00009.png med-00044.png med-00074.png

images-out/:

zsh/scr, photos 11:32AM sunset/ % ~/j/timelapse/timelapse.jl 50 images-in images-out
[1.536147186333474e9] - Starting
[1.536147186333673e9] - Loading modules
[1.536147201591988e9] - Sorting parameters
[1.536147201648837e9] - Reading images from directory [images-in]
[1.536147202022173e9] - Interpolating 50 frames
[1.53614720592181e9] - frame 1 / 50 left=1, right=2, prop=0.11999988555908203
[1.536147217019145e9] - saving images-out/image-00001.jpg
[1.536147218068828e9] - frame 2 / 50 left=1, right=2, prop=0.24000000953674316
[1.536147222013697e9] - saving images-out/image-00002.jpg
[1.536147222819911e9] - frame 3 / 50 left=1, right=2, prop=0.3599998950958252
[1.536147226688287e9] - saving images-out/image-00003.jpg

...

[1.536147597050891e9] - saving images-out/image-00048.jpg
[1.53614761140285e9] - frame 49 / 50 left=6, right=7, prop=0.880000114440918
[1.536147615090572e9] - saving images-out/image-00049.jpg
[1.536147615649168e9] - frame 50 / 50 left=6, right=7, prop=1.0
[1.536147619363807e9] - saving images-out/image-00050.jpg
[1.536147619960565e9] - All done
zsh/scr, photos 11:40AM sunset/ %

zsh/scr, photos 11:51AM sunset/ % ffmpeg -i images-out/image-%05d.jpg -qscale 0 -r 50 sunset-timelapse.mp4
ffmpeg version 3.4.2-2+b1 Copyright (c) 2000-2018 the FFmpeg developers

...

zsh/scr, photos 11:51AM sunset/ % ll -h sunset-timelapse.mp4
-rw------- 1 tim tim 4.9M Sep 5 11:46 sunset-timelapse.mp4

Exploring Strathearn

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I spent a happy evening exploring the Quoig area in Strathearn – the floodplain of the river Earn between Comrie and Crieff, south of the A85. Disused railway line, Sir David Baird’s monument and a luscious sunset. Can’t complain 🙂

 

Strathearn Sunset

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My sense of the geography of Strathearn has not really fitted together until quite recently. There have been a few locations, isolated points and a few lines: the A822 from Gilmerton up past Monzie to the Sma’ Glen; The Hosh at the foot to access Glen Turret; a small B-road between the two; a hill known as Kate McNiven’s Crag; and one or two other areas. More recently I’ve been climbing hills, “bagging” Torlum Hill and Laggan Hill as part of the Lady Mary’s Walk circuit out of Crieff.

The Highland Boundary Fault emerges in a burst of very lumpy landscape at the southern end of the Sma’ Glen. But what it does in the rest of Strathearn to the west, I’ve never really seen.

A couple of weekends ago I explored the Knock of Crieff independently; it struck me that the path up the north side afforded the perfect view along the length of the strath to the far mountains in the west, an elevated view along the glacial U-shape.

So late on Sunday afternoon I took the drone for a spin slightly out over the strath and made a panorama of 7 shots, each a 5-shot HDR exposure bracket sequence – blended on Linux, stitched and edited in Serif Affinity Photo for the iPad.

Lowlands to the left of me; Highlands to the right…

And just for the record, this is what it looked like in the middle of stitched the blended panorama, before I cropped and toned it:

Panorama stitching screenshot

Morvern 5/4: The Road Back

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And so we come to the last post in the series, a set of photos not entirely in Morvern but more on the way back up the shores of Loch Sunart and Loch Linnhe to the Corran Ferry, across and down to Loch Leven at Ballachulish.

There’s something wonderfully uplifting about rattling along these wee roads on beautiful sunny days, admiring the light.

Sunset Timelapse

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Further experiments making timelapse videos – this time the sunset looking across Strathearn to Crieff – from my favourite spot for hunting aurora.

The second has Ursa Major emerging, one star at a time, over the course of 50 minutes around midnight.

Both were taken using the Olympus Pen-F with its built-in intervalometer – the first with the 12-60mm f/2.8 PRO (four-thirds) lens, the second with the 7-14mm f/2.8 PRO (micro-four-thirds) lens – but the RAW ORF files were reprocessed using RawTherapee for better tone control, the results interpolated to generate 1500 frames (1 minute at 25fps) using a custom Julia script and merged with ffmpeg.

The audio is a minute of the T-in-the-Park festival recorded from a mile away with vocals added by sheep in nearby fields. A quick frequency analysis in Audacity shows the thumping bass peaks at around 58Hz (A1)…

T-in-the-Park festival from a mile away - frequencies peaking at 58Hz

T-in-the-Park festival from a mile away – frequencies peaking at 58Hz

Olympus Pen-F: first excursion photos

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I’ve not wasted time before getting out and about with the new camera. I saw a photo on flickr of the sea stack at Muchalls on the Aberdeenshire coast, near Stonehaven, which prompted a visit to explore the area and drive through lots of scenery. Unfortunately the path down to the beach was too slippy and muddy, so I settled for a higher vantage-point overlooking the rocky beach.

This was taken using an Olympus 12-60mm f/2.8-f/4 four-thirds lens with adapter, circular polariser, ND4 and grad-ND4 filters.

Rocky coastline and small sea-stacks at Muchalls, Aberdeenshire

Rocky coastline and small sea-stacks at Muchalls, Aberdeenshire

I continued to drive all around the A93 loop from near Stonehaven to Banchory and Ballater – the road lined with favourable Scots pine trees. The sun set as I was passing the Muir of Dinnet. This sunset silhouette was made using my old Pentacon 50mm f/1.8 lens:

The real delight of the day’s drive was rattling down Glenshee in the dusk. It was -2C outside; with the light having faded, the sky was a beautiful shade of cobalt blue, against which the silvery white of the pure snow capping the mountains was simply breathtaking.

Sirius Rising over Leacann Dubh and Creag Leacach – I know it was Sirius because by the end of the combined 64-second exposure, Orion was well visible to its right.

It feels so good to be back enjoying the landscape again.

Nacreous Clouds

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It was a pretty decent red sunset but seeing polar stratospheric (nacreous) clouds for the first time is the icing on the cake. Awesomely beautiful.

According to wikipedia, polar stratospheric clouds are clouds in the winter polar stratosphere at altitudes of 15,000–25,000 meters (49,000–82,000 ft). They are best observed during civil twilight when the sun is between 1 and 6 degrees below the horizon. They are implicated in the formation of ozone holes. The effects on ozone depletion arise because they support chemical reactions that produce active chlorine which catalyzes ozone destruction, and also because they remove gaseous nitric acid, perturbing nitrogen and chlorine cycles in a way which increases ozone destruction.