The Big DumpTruck

Throwing Little Thought Pebbles at Your Windshield Since 1996

Playing With an IR Filter

“Oh no,” the readers cried out in unison. “Not another photography post!”

Ah, yes, you’ll have so suffer, my children. This one will be fun, though. I picked up an infrared filter for my camera for $25 on Amazon, because it seems like a very cool toy. It’s not the easiest thing to play with, so these first attempts are me, attempting to learn how to take an IR photo. For one thing, you can’t see anything when then filter is in place, so you have to focus and THEN put the filter on. This means if you move the camera later, you have to remove the filter and refocus, etc. And even then, it might not be quite right. Also, you have to do a lot of post production on these photos because they come out violently red/magenta. It’s the nature of the filter. Lastly, if it’s windy like it was today, and your tripod is not very sturdy, your camera is going to move during the 5-30 second exposures you need to take to get the photos. Next time I’m going to try with a higher ISO so that I can use a shorter exposure time. We’ll see if that makes them a bit crisper.

Okay, so now that I’ve set your expectations into the cellar…

I stopped by Evergreen Cemetery in Leominster to take a few shots. The first shot is clear – no filter, to set white balance and focus. The shot after that is the IR photo, post-processing with some of the red left in for artistic purposes.

CLICK TO VIEW LARGER VERSION

Now, shot using the IR filter, 15 seconds at f/8, 35mm lens

The movement in the trees is due to the wind.
This next photo is a straight, no filter, no processing photo.

Here’s that photo converted to black and white. Looks pretty good, but lots of shadows.

This is the one with the filter – it shows a lot more of the details from the shadows, and I think it would look a lot better if the tripod wasn’t all blowy-aroundy.

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2 ResponsesLeave one →

  1. Ah, I knew there was a reason I started following you on twitter. This post inspired me to go hunting for the filters I knew I had SOMEWHERE in the house (found them, but no IR filter), and more importantly, inspired me to read the manual for the perspective control lens I bought in 2009 and haven’t yet put to good use.

  2. Jody

     /  April 30, 2011

    Cool! I want to see what you did with the filters! I went out again today with the IR filter. I looked through the results but will process them tonight. I’m hoping I got something interesting but nothing jumped out.

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