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General photography questions and answers: Discuss Hot spots...Hi all,took a few IR shots at the weekend, this time with me W/A lens & have ended up with ...
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Old 07-09-2009, 13:04   #1 (permalink)
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Hot spots

Hi all,took a few IR shots at the weekend, this time with me W/A lens & have ended up with a few hot spots here & there, ive heard about this but don't know much about it so what causes it to do it & is it the Tokina W/A just a problem lens with it to, tried different settings f5.6, 8,11& 16 but no joy?
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Old 07-09-2009, 13:39   #2 (permalink)
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Re: Hot spots

Not tried IR myself, but have used a Poloriser with a WA lens and got not so much hot spots, but a marked difference in the tone of the sky. This is due to the different angles the light comes into the lens due to the large angle of view.

Maybe it is a similar thing.
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Old 07-09-2009, 19:47   #3 (permalink)
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Re: Hot spots

Could be, 18-70 didn't show any until i put the W/A on cheers Dabs
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Old 09-09-2009, 00:29   #4 (permalink)
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Re: Hot spots

hey simpbow I don't know if this will help, but it seemed interesting the tokina 12-24 is one of the lens that creates hot spots but iy says Nikon 18-70 mm f/3.5-4.5 AF-S G ED DX is a MAYBE for hot spots, so it seems to be a credible site
DPanswer: Digital Infrared Resource page
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Old 09-09-2009, 14:56   #5 (permalink)
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Re: Hot spots

I found a list one time of lenses at a group of IR shooters. What I soaked up about hot spots are they can show up when shooting less then 45 degrees towards the sun. If it's one of your favorite lenses try a hood, the biggest you can get away with. My favorite lens for IR was the 50mm f1.8 until it came undone,,the front fell out "cheap". I did use the 50mm f1.4 and it will reflect hot spots that show up around the middle of the picture, I used a hood for it and stayed away from the sun and it works some what better but not as good as a lense that just doesn't get them. I used all of my lenses and weeded out the ones that shoot without a hot spot and don't use for IR the ones that do. I can live with lens flair but not a spot. Some lenses will reflect the infrared light around the inside of your lens and form a hot spot, it's just the way they are made. They might work great with the normal color zone but not near infrared. Like I said stay as far away as you can from the face of the sun and you should be somewhat OK but your also leaving your self open for what I call a hot spot light cast across the pictures. No hot spot per-say, just a light cast very noticible if your looking for it. Shoot enough of them and when your trying to bring in some contrast to your pictures you will know what I mean.
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Old 10-09-2009, 21:39   #6 (permalink)
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Re: Hot spots

Cheers ryan & boofers sorry about getting back to yous have just returned from a few days away, interesting stuff Boofers,understand a bit better now & know what to look out for, looks very interesting site ryan, cheers guys.
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