| Joined: | Mon Apr 2nd, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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I thought that " hot spot " would only occur with Infra Red shooting and only with some old glass , according to Bj¸rn R¸rslet , I have n`t encountered that phenomina , but I have no I R kit , thinkin´ about converting either the D1 or the D1x , have n`t decided yet ,
Hotspots can occur in normal photography in the wrong conditions for exactly the same reasons as for IR.
The light reflects from the glass sensor cover/hot mirror filter onto the rear element of the lens, and back, repeatedly, if you are familiar with audio you will have heard of feedback squeal, lens hotspots might be described as an optical equivalent.
There are several of us here on the forum who take IR photographs, if you do decide to have a go, I am sure we can give you some guidance.
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Robert.