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IR black and White photography

Nick_w Plus
8 4.2k 99 England
3 Jul 2010 8:34AM
As some will know i'm quite like B and W photography. I've stumbled on a couple ofphotographers who specialise in IR monos. I don't want to go to the cost of getting a body converted, has anyone had success with IR filters on say a D700. I know all cameras have diffeent sensitivities to IR, what about focal length shifts?

Any one with any suggestions or images to look at would be most welcome

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discreetphoton 11 3.5k 20 United Kingdom
3 Jul 2010 8:43AM
I've not had great results from nikon digitals for IR, Nick. The internal filter just seems to be too effective, and it's really hard to get any sort of definition in your shots.
Nick_w Plus
8 4.2k 99 England
3 Jul 2010 9:13AM
Thanks David, what wavelength have you tried with the filters?

Btw I'm not too concerned about long exposures
3 Jul 2010 9:54AM
Nick - all very good questions.....
I've always used Hoya R72 filters.
I know the D70 was VERY good with an IR filter; trouble is the modern cameras have much better internal IR filters and if you cut out the visible spectrum you end up with almost nothing.
My 5D2 the internal IR filter is so good that even in full sunshine I get 4s at ISO 400, f11, on overcast days 4 mins is a more typical at ISO 100 and I've occasionally suffered 20min exposures.
You need to shield the eyepiece to stop stray light entering - Camera straps often have a blanking cap on them, use that.
Lens design seems to affect the image - some lenses produce a bright spot in the centre.

As you have already mentioned - focussing is the real sod.
It is not the normal focal distance.
Auto focus and live view do not work.
The only technique that seems to work for me is to jack up the ISO a bit to take shots at relatively short exposures, tweaking the focus based on inspecting the image; don't worry about the noise - then when everything looks good put the ISO back to base ISO and go for it!
This is a also good way of estimating the final exposure as simple maths keeps the overall exposure the same; each stop less ISO doubles the length of time the shutter needs to be open.
Nick_w Plus
8 4.2k 99 England
3 Jul 2010 10:14AM
Thanks Duncan, some excellent pointers
Nick_w Plus
8 4.2k 99 England
3 Jul 2010 5:01PM
Has anyone any experience using an R72 filter?
thewilliam 7 5.5k
3 Jul 2010 8:05PM
If you want good IR from a Nikon-mount body use a Kodak DCS760.

Most sensors are sensitive to infra-red, so there has to be an IR blocking filter somewhere. In the 760, it's just inside the lens throat and easily removed. Although only 6 MP, it knocked the Nikon D1X into a cocked hat and gave the D2X a run for its money. Better still, they're dirt-cheap and I have a couple gathering dust.

I played with IR landscape and used a Hoya R72 filter. It gives very good infrared but you have to remove it for viewing.
Paul Morgan Plus
14 17.4k 6 England
3 Jul 2010 11:09PM
Unless you can get hold of an old D70 a conversion would be the only sure way to go.

these are excellent.
Nick_w Plus
8 4.2k 99 England
3 Jul 2010 11:40PM
Thanks for that, just checked eBay not one for sale. I do have an old D80. Tho 250 for a conversion does seem excesive.
thewilliam 7 5.5k
4 Jul 2010 12:09PM
The great advantage about conversion is that you can view normally because only the sensor will be infra-red. The R72 filter is pretty close to black.
Nick_w Plus
8 4.2k 99 England
4 Jul 2010 6:39PM
Can anyone recommend someone/ company who do the conversions. Else an online tutorial on converting a D80.
CaptivePhotons 12 1.7k 2 England
4 Jul 2010 8:33PM
I had my eye on this one for when my daughter gets fed up with her D40. I've no idea if the procedure is the same for the D80 though.

D40 IR conversion
Nick_w Plus
8 4.2k 99 England
5 Jul 2010 9:08AM
Just looked how much it is for the filter for a conversion ... Gulp.

Maybe after the hols
Graham0602 8 72 United Kingdom
5 Jul 2010 11:18AM
Had my old D70 converted at Protech Photographic in East Sussex about 6 months ago. Think it was about 170 I paid - just looked at their website and can't immediately find their current prices.
I found them extremely knowledgeable and helpful .......
User_Removed 5 4.6k 1 Scotland
5 Jul 2010 11:57AM
There is another, less expensive, way than having a dSLR body converted. Spend 10 on an old manual SLR and use IR film.

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