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  #1  
Old 06-12-2005, 02:26 PM
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iceman (Mike)
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NIR photography

I bought a Hoya #72 IR filter the other day..

Thought it might be worth trying out.. it's very interesting.. and challenging.

- I accidently left my ISO set on 800 from the astrophotography the other night, so all the images can out very noisy.
- I see nothing TTL with the IR filter on, it's just black. So composing the shot is just guess work, look at the preview and try again.
- Exposure times needed to be much much longer, even with ISO 800. I had to set it on manual 1/3s exposure f/3.5 at 26mm to get about the right exposure. If ISO was set lower like I'd wanted, I'd probably need 1/2 to 1 second exposures, so a tripod is a must.
- I should've used a tripod even with these, they're just not sharp because of hand-holding.
- They're also not sharp because focusing is difficult - I can't see anything through the lens. The camera had no trouble locking on focus, but I don't know what it was focusing on.

I think in future, I need to:
a) Set up on a tripod
b) Compose the shot without the IR filter on
c) Focus the shot without the IR filter on
d) Then put the filter on and bracket to get the right exposure

So it's not for everyone, and it's not really going to be used for a quick snapshot of something. But then, no filters are a quick snapshot.. they all require some fiddling and time.

As for the look of the images? I think they're interesting.. adds a new dimension to what would normally look like a dull scene. Obviously need some more experimentation to find objects that emit IR light for some different effects.

These images were resized and auto-levels in photoshop (my camera had a very purple/mauve bias originally), ran through NeatImage to remove noise and then sharpened in Photoshop. They're still not that sharp though thanks to the problems described above.

Anyway, what do you think?

Oh and the big lighter coloured circle in the middle of all my shots - is that a smudge on the lens or what? It's driving me mad.
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  #2  
Old 06-12-2005, 02:33 PM
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Striker (Tony)
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I see what you mean Mike...but gee's Mike it give's a great affect....just looking at the thumbnails got me hooked.

What no Mangroves or birds.
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  #3  
Old 06-12-2005, 02:42 PM
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h0ughy (David)
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that bright spot in the centre is on every photo? is that the filter or the lens???

nice effect though?
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  #4  
Old 06-12-2005, 02:53 PM
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iceman (Mike)
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I found the source of the bright spot.. it's a smudge on the IR filter that I tried to clean with the lens pen..

Here's a tip.. lens pen doesn't clean filters.. it just leaves a smudgey mark.

Will have to clean it properly tonight with some tissue paper and cleaning solution.
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  #5  
Old 06-12-2005, 02:55 PM
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ving (David)
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thats the same spot that was on your widefield shots isnt it?

v/interesting effect mike
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  #6  
Old 06-12-2005, 03:09 PM
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Now Mike knows what it's like to be a bee.....
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  #7  
Old 06-12-2005, 03:15 PM
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Quote:
Originally Posted by Rocket Boy
Now Mike knows what it's like to be a bee.....

blurry, out out of focus, seeing bright circles or dark ones......

hey you weren't pollinating on the way were you mike, visiting all those pretty flowers on the way around your lunchtime flight
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  #8  
Old 06-12-2005, 03:18 PM
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Quote:
Originally Posted by h0ughy
blurry, out out of focus, seeing bright circles or dark ones......

hey you weren't pollinating on the way were you mike, visiting all those pretty flowers on the way around your lunchtime flight

No wonder he gets excited when Kate calls him honey......
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  #9  
Old 06-12-2005, 03:25 PM
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Ok now on the serious note, how do bees know what is what? without the colour as taken by Mike above I can make out and fill in the blanks because I recognise the shapes of objects. I wonder how much shapes and light and darkness affects the "view" of objects. Mike how about taking a shot of the moon tonight and pick up some of the earthlight reflection on the dark part of the moon and do the same shot but without the filter and see what the difference is?
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  #10  
Old 07-12-2005, 12:26 PM
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Great shots Mike! I love the look of the IR effect.

I first started playing around with IR B+W and also colour IR film over 20 years ago. Now I sound old lol.

Anyway, you can get really weird effects alright. Here's two pics of my foot. THe one on the left in normal light and the one on the right with a Hoya R72 filter.

I'd love to get a 1000nm filter one day and image Venus!
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  #11  
Old 07-12-2005, 01:17 PM
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See lunchtime walk in NIR Mike.

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  #12  
Old 07-12-2005, 01:19 PM
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Quote:
Originally Posted by cometcatcher

Anyway, you can get really weird effects alright. Here's two pics of my foot. THe one on the left in normal light and the one on the right with a Hoya R72 filter.

Seriously, check out the veins in NIR, wow.

Nice one Comet.

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  #13  
Old 07-12-2005, 01:36 PM
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Quote:
Originally Posted by cometcatcher
Great shots Mike! I love the look of the IR effect.

I first started playing around with IR B+W and also colour IR film over 20 years ago. Now I sound old lol.

Anyway, you can get really weird effects alright. Here's two pics of my foot. THe one on the left in normal light and the one on the right with a Hoya R72 filter.

I'd love to get a 1000nm filter one day and image Venus!
thats a fine looking foot you have there sir.... much better than mine
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  #14  
Old 07-12-2005, 01:40 PM
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cometcatcher (Kevin)
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Lol, I think the IR one looks like a foot from a zombie.

Took a photo of a gecko once. Can see right into it's guts.
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  #15  
Old 07-12-2005, 01:47 PM
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ving (David)
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see its guts? are you serious?
wheres the pic?
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  #16  
Old 07-12-2005, 07:29 PM
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Burried deep in the cupboard somewhere on slide film. A bit too deep atm.

Mike, do you stilll have the IR filter installed in your camera? If so it would be fighting the R72.
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  #17  
Old 07-12-2005, 08:49 PM
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iceman (Mike)
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Kevin,

Yeh I haven't modded my Canon at all, and don't plan to. I know it's fighting the R72, but it's the best I can do.

Such a cool pic of your zombie foot! I'm gonna have to try that on my veiny arm
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  #18  
Old 08-12-2005, 06:24 AM
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Quote:
Originally Posted by cometcatcher
Great shots Mike! I love the look of the IR effect.

I first started playing around with IR B+W and also colour IR film over 20 years ago. Now I sound old lol.

Anyway, you can get really weird effects alright. Here's two pics of my foot. THe one on the left in normal light and the one on the right with a Hoya R72 filter.

I'd love to get a 1000nm filter one day and image Venus!
Makes ya foot look 20 years younger lol or one blotchy foot to one chiseled
by Mic Angello.

Great effect! love how it picks up your viens in ya foot!

regards,CS
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