digital rebel infrared

I have been shooting some digital infrared shots with a hoya r72

filter. I have been getting a round circle that is exposed more than

the rest fo the picture. I have been using the camera in manual mode

and manual focus mode. I tried covering up the eye piece in case

there was stray light coming in but that didn't help either.

 

any ideas?

 

thanks jesse

It has to do with coating of your lens. Certain lenses, such as 50/1.4 are know to have coating that would cause the problem you described.

 

Try a different lens and see if your problem persists.

 

Good luck

Jesse,

 

Lu was correct that some lens coatings aren't good for digital infrared. Here is a list of good and bad lenses for digital infrared.

 

Good

 

Canon EF 17-40mm L f/?

Canon EF 24-70mm f/2.8 L

Canon EF 28-135mm/3.5-5.6 IS

Canon EF 28mm f/2.8

Canon EF 35mm f/2

Canon EF 50mm f/1.8 MKI

Canon EF 50mm f/1.8 MKII

Canon EF 70-200mm f/4L

Canon EF 75-300mm/4.0-5.6 IS

Canon EF 135mm f/2L

Canon EF 100-400mm4.0-5.6 IS L

Canon EF 100mm f/2.8 macro

 

 

Bad

 

Canon EF 16-35mm f2.8 L

Canon EF 20mm f/2.8

Canon EF 24-85mm f/?

Canon EF 28-70mm f/2.8L

Canon EF 28-105mm f/?

Canon EF 35-80/4.0-5.6

Canon EF 50mm/f1.4

Canon EF 50mm/f2.5 Macro

Canon EF 70-200mm f/2.8L IS

Canon EF 85mm f/1.8

 

Hope this helps.

 

Jeff

You can add the Digital Rebel kit lens to those that have this problem with infrared. I was sorely disappointed when I first tried it, but found that both my Sigma 70-300mm and Canon 50mm f/1.8 work fine.