Size matters: How your camera sensor size affects lens performance

Camera Noir - defocussed camera body and lenses
It’s all about bokeh. OK? (See what I did there? Never mind.) Photo taken on a Fujifilm APS-C camera, crop-factor of 1.5. Taken with a 56mm lens at f/1.2.

The relationship between sensor size and lenses is often a source of confusion. So here is a quick guide that doesn’t use any complex geometry or advanced maths, just some methodical common sense. read

ISO invariance explained better – and why you don’t need to read this article

Below you can see the shot this came from
No, not the amazing Mystic Meg, but the amazing 16 meg ISO invariant sensor in a Fujifilm X-T1 camera. This was cropped from an underexposed image. You can see the original further down this article.
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There has been a lot of talk about ISO invariance of late, all of it sounding mighty complicated. Here’s a short simple explanation of what ISO invariance is, how it might effect the design of cameras in future and is this imperative information? (Standby to be disappointed on that last item) read

Typical trekking safety kit

Trekking safety kit
Safety kit includes: sun screen, hand sanitizer, zinc oxide tape, gauze dressing, compass, Swiss Army knife, whistle, aspirin, gaffer tape, head torch, tissues, space blanket, petroleum jelly, lighter

I’m as capable as the next person of making a stupid decision when I’m out trekking, so I hedge my bets by being in the habit of carrying some safety kit. This kit can be the difference between having a good trip and something that is quite unpleasant. read