Under £500 for a 75mm f/1.25 light monster. Is it for real?

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Thinking of buying the £10,250 Leica 75mm Noctilux. Just for a moment, perhaps? But what about £450 for this 7Artisans look-similar. Is it worth a punt?

Decent Exposure Part 1: Attachable external light meters and where they help

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The first part of our lightmeter review homes in on hot-shoe-mounted devices, ranging from the original Leicameter to the latest electronic models...