Eye damage from sun in viewfinder accidentally?

Started Mar 18, 2010 | Discussions thread
Graystar Veteran Member • Posts: 8,373
Re: Eye damage from sun in viewfinder accidentally?

VO2Max wrote:

Do not try this with and astronomical telescope though, you'll fry your eye!!!

From the stories I've read, you'll notice smoke rising from your telescope before you ever get that far!

It is my understanding that looking directly at the Sun is not enough to cause damage to your eyes. The lenses of your eyes simply aren't collecting that much light. So any lens that gives you a 1:1 view (the ol' 50mm debate) or smaller is probably fine. Any lens longer is cause for concern.

It is also my understanding that you can cause some damage by going from dark or normal illumination to direct sunlight...but it's because of a chemical reaction to the UV.


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