Sort:  

No 7 was taken from the North side of the Church where there is a large hill so that is why it looks like a drone. The IR filter is a 590nm one. This lets in infrared light and a little bit of visible light too. This is then white balanced in the Nikon Raw converter. The blue an red channels then need to be swapped in Photoshop to give a blue sky.

You can find an explanation of all of this here:

https://www.lifepixel.com/photo-tutorials/infrared-photoshop-videos

@thecryptofiend ah, that explains it. Anyhow - it still looks magical.

Thank you for explaining the effect of the IR filter and the whole process and thank you for the link ^ ^