Infrared Photgraphy Question

[pedroj]

I had a play with one of them..Here's the result...

 

[StandsOnToes]

Had some more time to mess with them....

Next time I go out I think I need to shoot something other than pine trees, and give it a longer exposure. I think these were : ~f8 , 4s - 8s, iso 100.... I think i'm going to stop down the aperature to f20 and do 30s or more exposures next time and see how that goes.

 

[StandsOnToes]

Went out with my IR filter again today... ended up with this. I think i'm starting to get the hang of the channel swapping and changing colors hues.

I find that on a bunch of shots I end up getting a "streak" of magenta, or over exposed streak.
its usualy in the center of the shot going left to right covering about 1/5th of the image... this makes them un usualble.


I can't figure out if this streak is happening because of the way i'm holding the filter in place,( I don't think i'm moving it to where some Visible light leaks in) or maybe its the direction of the sun in conjunction to the direction i'm taking the shot.

I tried to rule out those possibilities but I can't be sure... any tips?

 

[pedroj]

Does your filter screw onto the lens and what type is it...

 

[StandsOnToes]

Does your filter screw onto the lens and what type is it...

Its a Cokin slide holder type filter, not a screw in. I'm using it without the filter holder and just hand holding it (I know i'm probably moving my camera then too) but if I put it in the holder theres light leakage and I can't get a correct shot

 

[StandsOnToes]

I read a bit more online and I guess some lenses will give you a "hot spot" when doing IR. I've tried two different zooms and a prime and they all will occasionaly give me that streak.. i'll post a pic so you see what I mean, the first isn''t as obvious, but the second is bad... both pics are unusable

 

[pedroj]

You may have to by a screw in type to try..I bought one from Hong Kong for $30...IR 720