A Sunday Afternoon Escape

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A few photos from an afternoon escape in August – one of my favoured routes, starting with the trek from Amulree along Glen Quaich – a moderately long stretch becoming quite a tricky road, steep with S-bends:

As always, the view from the moor along the top was awesome – particularly with ominous dark clouds – I experimented a bit with a variable-ND (crossed-circular-polariser) filter to lengthen the exposures up to 30s:

From there, descending yet more wiggly bends on the way toward Kenmore, there’s a tiny track off the road to a small carpark nestling in amongst the heather. The hillside above there affords a glorious view over the Appin of Dull – there was even a bit of light on Loch Tay looking the other way as well:

Above Kinnoull Hill

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I’ve discovered DJI GS (“groundstation”) Pro, which allows me to plot-out routes in advance with waypoints and control what happens at them, long before arriving at a location.

Well, currently we’re at the stage of wondering why the camera’s pointing back the way we came when it should be looking exactly the opposite direction.

Still, there’s a lot of nice views to be had above Kinnoull Hill.

 

And the finished video:

Glen Artney

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Just one photo from a quick afternoon excursion to explore Glen Artney earlier in the year. Well, one photo, processed 3 ways.

This was the first, and so far only, time I’ve felt the urge to invert the tripod centre column; in the process I discovered that the Pentax K-1 live-view display will happily invert the image correctly, but leaves all the exposure and histogram overlays the wrong way up – as if trying to use the thing upside-down was not hard enough itself! Oops.

A pleasant waterfall in the Allt na Drochaide burn, a tributary to the Water of Ruchill, Glen Artney.
This was the first, and so far only, time I’ve felt the urge to invert the tripod’s centre-column and dangle the camera millimetres above the water. In the process, I discovered a bug with the Pentax K-1: if you use live-view upside-down, the image inverts itself correctly but all the settings controls (histogram, etc) do not. It’s tricky enough wondering where the control dials have gone, let alone where the numbers they control are to be found on screen. D’oh!

A pleasant waterfall in the Allt na Drochaide burn, a tributary to the Water of Ruchill, Glen Artney.
This was the first, and so far only, time I’ve felt the urge to invert the tripod’s centre-column and dangle the camera millimetres above the water. In the process, I discovered a bug with the Pentax K-1: if you use live-view upside-down, the image inverts itself correctly but all the settings controls (histogram, etc) do not. It’s tricky enough wondering where the control dials have gone, let alone where the numbers they control are to be found on screen. D’oh!

A pleasant waterfall in the Allt na Drochaide burn, a tributary to the Water of Ruchill, Glen Artney.
This was the first, and so far only, time I’ve felt the urge to invert the tripod’s centre-column and dangle the camera millimetres above the water. In the process, I discovered a bug with the Pentax K-1: if you use live-view upside-down, the image inverts itself correctly but all the settings controls (histogram, etc) do not. It’s tricky enough wondering where the control dials have gone, let alone where the numbers they control are to be found on screen. D’oh!

My Strathearn

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I’m very fond of the views along the length of Strathearn – from the Knock at Crieff or above Monzie joinery on the A822 road looking west, the view to overlapping hills in the distance is deeply pleasant.

This is an unashamed dump of a load of photos made over the course of two strolls up and down Torlum Hill outside Crieff – the first mid-afternoon with a variable-ND / polariser filter, the second immediately afterwards with a regular 2-stop circular polariser instead. The same technique has been applied to all  – auto whitebalance and handheld HDR with a 1EV bracket either way. All are presented here in chronological order to compare the difference the light and a proper filter make in the landscape.

On the way back home after strolling up and down the hill, I saw a colourful Earth’s Shadow (aka Belt of Venus) developing, just as I happened to be passing one of my favoured characterful trees outside Muthill.

Sunrise at Kinnoull Hill

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Early one morning in August I set off up Kinnoull Hill in Perth; a 40-minute stroll through the woods and I arrived at the top just in time for sunrise.

There are a couple of classic viewpoints, although juggling foreground foliage is not the easiest. This is the view closer to the tower with a hint of sunlight behind the hill, a line of light streaking round to illuminate some of the yellow trees below:

Sunrise behind Kinnoull Hill, with the River Tay running along the Carse of Gowrie into the distance

And this is a little further back, the sun having risen illuminating the whole Carse of Gowrie and River Tay, sky still shades of yellow and pink:

A classic view of the tower and River Tay from Kinnoull Hill, Perth

Walking back through the woods was rather pleasant too – lots of dappled sunlight on the trees.

This was one of the first photo-sets I processed using Affinity Photo Pro on the iPad. Loving the colour and tone already!

Birnham Hill

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One of my favourite views is the Highland Boundary Fault running through the landscape, immediately in front of me standing at Stair Bridge Viewpoint part-way up Birnam Hill.

It looks particularly pleasant with light and cloud-shadows zipping over the trees too:

Lady Mary’s Walk, Crieff

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Only catching up on photos taken at the end of April…

Lady Mary’s Walk runs West from Crieff along the side of the River Earn, mostly on the flat until one reaches the foot of Laggan Hill after a mile or so, where it forms a circular route back to MacRosty Park.

At the end of April I went for a stroll to hunt bluebells.

The path was particularly pleasant – quiet, leading on through the woods.

 
 
 

As an aside, I’m sure there never used to be such a profusion of wild garlic on these Perthshire woodland nature trails 10 years ago – I only first encountered the stuff whilst out in Galloway.

I was a bit early for optimum bluebell season, but did find a few areas of good blue ground coverage:

And at the western extremity of the route there is a ruined house – it could be quite eerie given the right lighting.

Along the Oak Walk

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One of my favourite walks around the local area is the Oak Walk – running along the edge of a large field, it gets beautiful evening sunlight and has some characterful trees

One or two local folk have populated it with wooden sculptures, for amusement factor

And the surrounding paths are well populated with wild raspberries, brambles and even willowherb/fireherb looking pretty in the light.

Just One Photo

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Black Spout Waterfall, Pitlochry

Some days you only need to come away with one landscape image to justify an excursion.

On Saturday I set sail with Doglet and a friend and strolled through Black Spout Woods around Pitlochry, up to the viewpoint across the gorge where you can see the full height of the waterfall, and then round to the more accessible bit near the top of the falls, which still takes a fair amount of scrambling around on the river bank to get down to.

 

A nice stroll through the woods, a view across the gorge to the full height of the waterfall, some scrambling around on the banks to get down to this level (a small fraction of the total height down from the top) with friend and dog… A good way to spend an afternoon

Technicalities:

There are three conscious aspects to this shot:

Composition

I wanted to make the most of the 15-30mm lens, so with a bit of wiggling around at the scene I found a spot right in front of the cascades that would showcase the 16mm ultra-wide field of view with a strong foreground. Nothing clipped; there’s negligible cropping except for lens-correction. There’s something in each pair of corners: the strong diagonal line of the dead tree-trunk in the foreground is echoed by the three distant trees in the far top-left; the negative space of the burnt-out sky has an echo in the expanse of run-off water in the bottom; treated as three stripes, there’s a balance between the height of the frame given to the run-off, to the bright white cascades, and to the woods+sky at the top.

Sensor controls

I made 10 source images on the Pentax K-1, varying the exposure as follows:

f/13.0 1/50s; f/14.0 1/8s;
f/16.0 0.4s; f/16.0 0.5s
f/16.0 0.5s; f/16.0 0.8s
f/16.0 1/4s; f/16.0 1/8s
f/16.0 1/8s; f/18.0 1/6s

This set of exposures spans a large contrast range from bright grey sky down to dark shadows in the rocks; it varies the shutter speed so at least a few will make the water look like brushed cotton; it varies the aperture partly to cater for the range of shutter speeds, and partly so as much of the shot as possible has a frame with maximum detail before diffraction. Enough data that enfuse could find a good midtone maximizing local entropy (detail) at every pixel.

Each of the above had pixel-shift enabled for greater resolution, totalling 40 frames of 36MPel resolution. The shutter was open for a combined total of 12s.

Post-processing

I used my open-source Pentax K-1 pixel-shift workflow on each of the 10 images above, and then reused it again to blend all 10 together into a combined HDR average. Opening this in darktable, I proceeded to correct lens-distortion, finalize the crop (16:10 aspect-ratio, one of my favourites for landscape), set detail modules (no need for noise-reduction! some balancing of detail, local detail, equalizer modules though) and exposure, toning (including tonemapping and low-pass filter) and colour (Velvia). There are not many localized modifications, but there are significant grad-ND filters both down through the trees and, opposing that diagonally, up from the bottom of the frame, along with two instances of the vignetting filter (one significant, one just clipping the corners); there is also extra local contrasted masked into an area around the dead tree trunk. Finally I opened the image in The Gimp and ran the G’Mic filter suite including colour-grading twice (once conventionally, once with extra highlight/shadow duotone effects, blended together – this has the side-effect of changing the tonality in the green leaves to make it look brighter/sunnier than it actually was). A tweak to the curves to lift the overall gamma and then I overlaid my favourite texture image, a photo of a sheet of Hahnemuehle Photo-Rag paper, in soft-light mode to soften the contrast and add a small amount of texture into otherwise barren areas.

Why this Workflow?

Working this way hits a sweet-spot in terms of convenience and image-quality.

I did not fall in the river. That’s a good start.

With such a wide field of view, every centimeter counts when choosing the location. With the 15-30mm lens I was able to experiment, iteratively varying location and focal length, until an optimum position was found, all the while seeing exactly what the final composition would be in live-view.

Pixel-shift – moving the sensor around in a 1px square pattern – works as a great way to increase the resolution.
The alternative would be to shoot a panorama, but that would still require HDR blending of frames as well as risking motion-artifacts in the trees; with just HDR on its own, the ghosting of the leaves from averaging multiple frames is a more pleasant indication of movement rather than errors in stitching. Additionally, shooting a panorama would require just as much care over camera position but would not allow a preview of the composition.
As a hybrid option, with cameras that lack pixel-shift or equivalent technology, one could compose approximately and then vary the tripod position subtly to emulate hand-held camera-shake; this is almost identical to pixel-shift in terms of super-resolution, but varying the camera position risks introducing artifacts from lens-distortion and parallax between foreground and distant parts of the scene, that pixel-shift avoids.

Additionally, shooting every frame 4x over, automatically, increases the overall exposure time into multiple seconds, even in daylight, which avoids the need for Big Stopper-type filters (especially handy on a lens that would require a special holder for such).

A Day In Clouds

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That was 2017-06-20, that was. A beautiful blue sky with white fluffy wispy cirrus cloud catching the setting sun…

…followed by a noctilucent cloud display around 1am:

NLCs are the highest-flying clouds, occurring at altitudes up to 80km where the next highest type (cumulonimbus) only reaches 12km and most are lower still. Most typically they resemble a fine silver filigree of ice-cold pale blue, although more complex forms have been seen. First maybe-seen in 1885, they only really came to prominence since the 1980s, as a canary for changes in the upper atmosphere linked to climate change.

As I stood and watched the display, a patch of silver mist formed over Strathearn and made its way west along the A85 toward Crieff, so I made a little timelapse video – 17 minutes’ data compressed into 1:

Noctilucent Clouds (NLCs) 2017-06-15

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It’s just a week off being the longest day, and it seems never to really get dark at night around here at the moment. Still. While that precludes shooting the aurora, instead it’s noctilucent cloud (NLC) season – just started in the past couple of days so I was very pleased to capture these last night / this morning around 1am.

Apart from being a canary for global warming, NLCs are a beautiful phenomenon, glowing cold bluey-white typically filament threads lighting up the sky. Or, if you leave the camera thinking for 2 minutes they blur nicely with the more mundane clouds:

Noctilucent Clouds, around 1am – Crieff across Strathearn from Auchterarder
A total 2 minutes of exposure to see what the NLCs and ordinary clouds would get up to over that kind of timescale.

And I made a short timelapse – 6 minutes compressed into an 11-second video:

Birnam Hill: Hunting the Highland Boundary Fault

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I’ve been to Birnam Hill and Duncan’s Hill area at least six times, so it made a good testing ground for the new Pentax K-1 camera.

It wasn’t the best of days for landscape photography – a bit early in the day for what little light there was to be really photogenic – but there was a moment when the sun broke through and illuminated some birch trees on top of Duncan’s Hill most beautifully:

For some years I’ve known the Highland Boundary Fault crosses the A9 around Dunkeld/Birnam area, but never really pinpointed the exact location.

On my first visit I walked around Duncan’s Hill through Birnam Wood and Rochanroy Wood: I observed a particular lump of rock exhibiting clear strata sticking out of the hillside:

As I passed the edge of the established woodland, there was a pronounced drop of about a metre to the level of the new conifer trees to the right. And I wondered if this was a particular noted geological formation.

Highland Boundary Fault, Birnam Hill

Three paths: this one leads down the line of the Highland Boundary Fault

On more recent visits I geotagged the location and compared with the British Geological Survey’s maps to see the rock types change either side of the dip – till, changing to slate and grit and then to psammite and semipelite typical of the Highlands.

On further investigation with Google Earth, the photo on the corner of the dip is right on the line of the Highland Boundary Fault itself, running up from Rohallion Loch through the lodge, round north-east turning easterly across the A9 south of Birnam.

My photo pinpointed right on top of the Highland Boundary Fault

The previous photo pinpointed right on top of the Highland Boundary Fault

Got it! Clear confirmation. Right on the money, first time 🙂

The path continues across a pronounced dip in the landscape before continuing up the other side to Stair Bridge Viewpoint and the King’s Seat on Birnam Hill.

Of course my favourite clear pure waterfall was still running:

The path affords some excellent views back of the Highland Boundary Fault cutting across the landscape:

Highland Boundary Fault to the east of Birnam

And finally, as far up the hills as I wanted to go that day, at Stair Bridge Viewpoint I was rewarded with a clear landscape vista over Rohallion Lodge to the Lowlands to the south:

View from Stair Bridge looking over Rohallion Lodge to the Lowlands to the south