DP2S Full Spectrum IR Conversion with samples

Started Dec 6, 2012 | Discussions
abijake
abijake Regular Member • Posts: 148
DP2S Full Spectrum IR Conversion with samples
4

I recently commisonioned a conversion of my DP2S to full spectrum colour (UV + IR  + visible spectrum) and it may be of interest to publish some initial images.

The conversion was done by Kolarivision in NJ, USA for $ 135 US.

The following were all shot at ISO 50 with a custom white balance (set to scene being shot) and no filter. Various colour manipulations were done in Lightroom 4.

There is a lot of colour data in these files that can lead to very interesting places. That colour gamut was only made possible by doing a custom white balance. The standard WB settings do not work well.

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MOD Kendall Helmstetter Gelner Forum Pro • Posts: 20,128
Re: DP2S Full Spectrum IR Conversion with samples

Very interesting results, do you also plan to try shooting with IR filters also?

$135 is not much for the conversion...

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D Cox Forum Pro • Posts: 21,137
Re: DP2S Full Spectrum IR Conversion with samples

Interesting. The colours are much the same as were given by the Ektachrome Infra-Red film, but with much better resolution.

Can you say more about the White Balance?

abijake
OP abijake Regular Member • Posts: 148
Re: DP2S Full Spectrum IR Conversion with samples

I have tried an 850 nm IR filter and a polarising filter. The results were not as good and required much higher ISO's leading to a lot of noise. The only native WB setting that came near to a custom setting was the tungsten setting but this did not give the colour differentiaition that custom settings give.

The custom setting was done by simply shooting the custom reset to a scene of mixed objects and background (foliage, part cloudy sky and buildings). That setting then maximises the colour differentiation in the scene. Lightroom 4 colour sliders can then be used to maximise the monochrome IR effects.

So with a custom WB as such both the colour and monochrome effects are the best (ie most extreme).

The colour gamut with other standard WB settings tended to be a sea of magenta with little else.

Kind regards. Malcolm.

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Erik Magnuson Forum Pro • Posts: 12,247
Try a red blocking filter

abijake wrote:

I have tried an 850 nm IR filter and a polarising filter.

Another filter to try is one that blocks red. Wratten gel filters pass IR, so one of the blue series (e.g. 44 or 44A) can give interesting results.

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Erik

atom14
atom14 Senior Member • Posts: 2,164
Re: DP2S Full Spectrum IR Conversion with samples

D Cox wrote:

Interesting. The colours are much the same as were given by the Ektachrome Infra-Red film, but with much better resolution.

Can you say more about the White Balance?

Abijake. D Cox took these thoughts right out of my head!!! (Thanks, D Cox.)

Now I can only repeat: Interesting! And I find the colours in the 1st shot really attractive.

atom14.

abijake
OP abijake Regular Member • Posts: 148
Re: Try a red blocking filter

I do not have any blue filters but I have tried green orange and red - all producing different palettes. An alternerative ways is modification in Lightroom or channel swapping in other applications (and can re-import to Lightrrom) . There are literally hundreds of different colour palettes to choose from.

Malcolm

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mmr Contributing Member • Posts: 871
Re: DP2S Full Spectrum IR Conversion with samples

What do flowers look like?  One of the factoids I learned in biology was that some flowers will actually change their colors once they've been pollinated.  The bees know to avoid these changed flowers, but the change is often invisible to us.

Here are some visible light changes:

http://www.sciencedirect.com/science/article/pii/S0367253011000119

And this page has images of flowers changing in the UV:

http://www.fs.fed.us/wildflowers/pollinators/animals/bees.shtml

But the resolution isn't so hot.  Hence the request

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abijake
OP abijake Regular Member • Posts: 148
Re: DP2S Full Spectrum IR Conversion with samples

I would need a specialised UV only filter for this - and I have thought about such a purchase. I will find out costs and if I go ahead I will publish results as a new posting here.

Malcolm:-)

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(unknown member) Senior Member • Posts: 1,549
Re: DP2S Full Spectrum IR Conversion with samples

Some of these are very psychedelic. I really like these effects (on the photographs! :-)).

Just to let me understand... this cannot be done in LR or any other software and this is why you had these commissioned?

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Simon
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