I have been umming and ahhing over getting my 7D Mk2 converted to IR, but after doing some research I found it cheaper to buy one that had already been converted. So I bought a Canon 550D that had already been converted for £269, checking lenses for hotspots and suitability is also another thing you have to consider with many newer lenses not suitable because of coatings etc.
The best site I found was this one https://kolarivision.com/articles/lens-hotspot-list/#:~:text=Lens%20Hotspot%20Database%201%20Nikon%20Lens%20IR%20Hotspot,Lens%20IR%20Hotspot%20Performance.%20…%20More%20items…%20
It shows which lenses are best suited to IR photography and has been a great resource for me.
Shooting with an IR converted camera is just the same as using a conventional camera but with some added considerations:
First things do not look the same…obvious I know but it really does take some consideration, manmade objects, the sky and water absorb IR light whereas foliage and skin tend to reflect IR light. This means that the Sky, water and architecture will appear from dark to black and foliage and skin will appear white. Although Bright sunny days are meant to be best a lot of sites also say that stormy days with broken cloud can give far better images.
With some jiggery pokery with the Channel Mixer in PS, you can get some pretty bizarre effects as well giving an alien planet type impression.
The image above shows the dramatic difference between the reflection and absorption of the various surfaces and so far is my favourite image taken with this camera. Although buying a IR camera in autumn was probably not the wisest decision I have ever made, it is a great bit of kit if you are looking to be that little different.