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Q&A How can I reduce blurriness when taking a photo in the dark, using only UV light?

I'm trying to take a photo of a white paper heart in UV light, to make the heart look like it's glowing. I expect that the heart is going to look, well, purple, rather than white. I'm taking this p...

1 answer · posted 4y ago by Mithical‭ · last activity 4y ago by Olin Lathrop‭

Question focus ultraviolet

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Mithical‭ · 2020-07-01T20:09:04Z (over 4 years ago)

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I'm trying to take a photo of a white paper heart in UV light, to make the heart look like it's glowing. I expect that the heart is going to look, well, purple, rather than white.

I'm taking this picture against a white wall with the regular lights off, at night, so pretty much the only source of light is the UV light.

![blurry photo of purplish heart](https://photography.codidact.com/uploads/mu1JP7CEF27jY69yvwB9QCgf)

Unfortunately, it came out... rather blurry around the edges. The color is fine, the background (which is a white wall) is fine... but the edges of the heart itself are just not coming through clearly.

What can I do to have the edges of the heart show up more clearly when photographing in the dark, using only UV light?

I'm using a GoPro Hero 7 Black, set to automatic Superphoto (but I can adjust the settings).

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