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Yes it is IR with partial colour - a 590nm filter. So unlike those completely artificially coloured photos there is some actual colour in them but it is not exactly accurate because there is no way to convey IR red information without giving it false colour.

Further the blue and red channels are swapped to make the sky blue. You can keep them without swapping the channels too and it gives more of an orange tone to them - but either way it is technically mostly artificial colour.

Lifepixel is a great site which explains the different IR filter types and the artistic ways they can be used. The following page has a comparison of the colour options if you are interested:

https://www.lifepixel.com/infrared-filters-choices

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