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mole2k — Digital Infra-Red
Published: 2007-11-08 07:09:34 +0000 UTC; Views: 5680; Favourites: 60; Downloads: 270
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Description
I wrote this tutorial ages ago when I noticed the amount of questions I was being asked on digital IR was increasing so i decided to write a tutorial that I could point people towards.Related content
Comments: 56
Something like the hoya R72 should work. Does the camera not have a bulb mode where you can hold the shutter open indefinitely with a remote, you have to time the shots yourself but it lets you get long exposures.
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okay, yeah I hear a lot of people who have a hoya r72. Oh right bulb mode is a good idea of course^^ Thanks!
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I probably should mention that in the tutorial that anything over 30sec needs bulb mode and manually timed!
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yeah^^
hmm I'm now looking at e-bay for IR filters, some say 'for HOYA bk61' do you have any idea what that means? and the filter is only 12 euro's ($16,80)
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I had a look about and cant actually see anything wrong with them. I've no idea what the Bk61 bit is about though. For the price it's probably worth giving it a go!
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indeed, but I'm still not sure my camera is compatible with it (it's a canon 1000d). Cause I found things on the internet about an IR cut filter on some camera's and that should be removed before making IR photos... what do you know about that?
I don't want to open up my camera and ruin it :S
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All dSLR's have a filter inside that cuts out IR light to varying degree's. Thats what gives you the really long exposure times when you use an IR filter as basically your cutting out both kinds of light so very very little light is actually getting through so you need a long exposure. It's possible to modify the camera by removing the IR cut filter and adding one that cuts visible light then you camera operates like normal but takes IR photos.
It will work with just an IR filter and a long exposure though
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ohh okay I understand thanks!
in that case, I'll just work with long exposures^^
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My filter got me very very long exposures. An R72 equivilant will get you much shorter (but still up to a minute or two 
To do the long exposures you'll need a remote shutter cable that you can lock open.
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yeah cause yours is totally black.
hmm and that is with iso 100? well, I'll just try some different things and see how it works out^^
Oh I can't wait untill the filter arrives xD I ordered the Hayo R72 anyway
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I might order myself an R72 sometime, I dropped my filter so havnt been able to take any in over a year!
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I'll get another one at some point, I would probably go for an R72 instead to leave things a little less boring
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okay^^ haha why less boring? your photos are very good I think
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Taking them is very boring as my exposure times where 10-15min+ so I had to line everything up then wait about.
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ohh that way haha yeah, and hope that people don't walk trough your scene >.<
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With that long an exposure it didnt actually matter. I took one of a lake and two boats went past and you cant see either of them!
As long as they keep moving they dont leave a big enough trace on the actual photograph to be noticable. If they stood around chatting for 5-10min you would notice them as a blur (as they would be moving a bit)
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oh right that's true^^
could be a cool effect though, some ghost-like people in your photo.
look my fist try: [link]
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Yeah i've seen some shots like that before, it looks pretty cool.
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haha oh I'm gonna try that some time, I'll just ask my my sister to walk trough my photo while making one^^
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I remember seeing a photo in national geographic of a marketplace filled with people and they took a long exposure and the people shopping where blurred but the people at the stalls wernt. It looked awesome.
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yeah, I can imaging that
like those photo's from highways made in the dark, where you only see the stripes of the carlights, that's so cool, I also want to make a photo like that some day^^
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Yeah i've seen some awesome shots like that before, i've never tried it as I live out in the middle of nowhere so there isnt any big highways here.
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here neither, well I don't live in the middle of nowhere, but for some reason the closest highways are always very quite when it's dark...
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For some reason they stopped all the highways about 60 miles from here on both sides
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haha weird, where do you live?
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oeh Ireland, nice 
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haha well I'm used to that
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Yeah, you just tend to not notice it after a while. It's quite a surprise when the sun comes out
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this is great. answers so many questions that i haven't gotten around to asking.
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I need help! I've just bought a Cokin P007 IR filter to use, but I can't get it to work properly.
I've taken a picture with the right exposure, as everything is bright red. But when I take the picture there are bright rings around the photo and large bokeh.
Why is this happening? Here's an example shot: [link]
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The red effect is due to the white balance being wrong. Its quite common that the shots come out red, if you shoot in raw it allows you to change the white balance afterwards giving you a little bit more room to get the colours balanced.
Im not quite sure what the blue flare is being caused by, its possibly a light leak. Is the filter a screw in one or is it a square one in a holder. It might be work trying to see if there is any light leaks as even the smallest leak will have detremental effects on the photo. It might also be caused by light leaking in through the viewfinder, it might be worth blocking it up during the long exposures to help erradicate light leaking.
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Viewfinder leak seams right, as it looks like a reflection of the lens on some photo's. I'll give it a try by covering up the VF and see what happens.
Its a square slide-in filter by the way, Cokin P007.
Thanks for the help!
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If the viewfinder isnt the issue you could try going around the filter with some bluetac to help seal it.
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fantastic info. Would also be great to give if you know some info on best way to modify or which filter does best job in IR modified cameras nowadays.
I added you a link in my journal
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Sadly I dont have any experience with IR modded camera's, I do hope to mod my 20d when I can afford a new camera.
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Thanks
I've been intending on writing a processing tutorial for digital IR photos as I find it is quite different to conventional photographs.
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Wow, great stuff! Didn't know IR images were even possible with conventional cameras. Nice work, love how the vegetation comes out snowy white!
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They are possible it just takes a bit of time and technique to get it working.
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They range from quite cheap to silly expensive.
The one I have cost me about $60 from hong kong but a 77mm Hoya R72 which is one I want to get costs quite a lot, in the $140+ region which is why I went for the cheaper filter to start with as I wasnt sure if I would like doing IR stuff.
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Cool
Nice wiki too, I've it bookmarked!
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