Grzegorz Baran published a video, where he shared what kind of equipment he uses for environmental capture. Take a look!

As Grzegorz mentioned, these are the essential things that he needs on his trips. 

In the video, he lists the equipment in the beginning and then goes more in detail about each of them. If you want to get an even more detailed look at the equipment and the process, you can check this guide.

Also, check Grzegorz's page on Artstation for more environment content!