Does anyone else use one of these things? They are about a fiver on amazon, which is expensive for what they are, but I find myself using mine quite a lot. They are great for previsualising a composition or aspect ratio before you get your camera out. There is a hole in the middle which I believe artists use for isolating colours but I discovered something about it that I should perhaps have realised before. If your eyes are not as young as they once were, the hole acts to increase the depth of field of your eyes. I find I can see more detail when I hold it up to my glasses, particularly in darker environments like the inside of a church.
BTW, I have new spectacles in case anyone thinks I should be visiting my optician.
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