Photo #107

I’ve written about the Whitford lighthouse before but these are a couple more images taken at high water. I took advantage of a 30m high sand dune to get a vantage point that showed the lighthouse with just the water as a backdrop. Unfortunately even with my 55-300mm zoom lens at its maximum I still had to crop the image quite heavily which means that it’s not as sharp as I’d like. The lighthouse went out of use some time ago but the local cormorants still appreciate it!

My idea for this image was to get just the upper part of the lighthouse with the cormorants against the sky. However there was a large flock of oystercatchers on the shoreline feeding on the outgoing tide and I felt that it was a little unfair to disturb them so I made do with this composition. The long lens foreshortens the image and it’s further than it looks to the other side of the estuary.

Solution Hollows 3D Model

Recently I posted a picture of some solution hollows in a huge block of exposed limestone ( right ). By coincidence shortly afterwards I read a forum post about a different set of solution hollows in a much smaller block of stone. As they were not that far fromΒ  the original set I decided that a photogrammetry outing was in order πŸ™‚

Both of the models below were created using the Alicevision Meshroom software and still frames extracted from video taken with my Panasonic compact camera.

Set #1

Of course when I returned to the first set it had been raining and they were full of water πŸ™‚ However I carried on and the water has actually been captured quite nicely. Some of the shadows and reflections look a little odd but still acceptable in my opinion.

These hollows are about 15cm / 6” across and the model was created from 162 original images.

Set #2

I read about the second set on The Megalithic Portal website. The author suggests that these may be possible ancient rock art rather than natural but I’m not convinced. However this is way outside my area of expertise so I can’t really comment on either option. What is interesting is that these hollows are in a much smaller rock ( 30cm x 30 cm ). I don’t know how long hollows take to form but the abstract of this paper quotes ” … a minimum limestone denudation rate of 71mm per 1000 years” so that rock has sat there for a while without being disturbed πŸ™‚

The model was created from 177 original images.