This abstract photo, captured inside a lighthouse with a small 35mm-format mirrorless camera and a 50mm lens, is mostly a visual pun on the concept of a lighthouse, as well as a study in diagonal and radiating lines.

It was very tight quarters, especially with the tripod. But a tripod was essential here (less for sharpness - at 1/3000 sec - than for composition and framing).

@mattblaze Out of curiosity, do you keep notes on all these photos? I ask because this was a photo from 2014, but you still mentioned the tight quarters.
@mattblaze – to me it immediately invoked a fresnel lens, which adds another layer to the pun.
@mattblaze very nice (I'm a fan of lighthouses) - what are we looking at in that image? Looking at it on Flickr it looks like it might be part of a wall illuminated by the window?
@chris_bloke The floor of a landing
@mattblaze oh wow - that definitely bends my mind - thank you!