I’m not sure about camera or lens since I was using a variety of Nikon bodies and every Nikkor prime lens from 20mm to 135mm. Most zooms were still pretty soft back then.
My color slide film of choice was Kodachrome . . . with all those nice bright colors that make all the world a sunny day. (hmmm!) To get an idea of the magnitude of this dry magma flow, you can see a railing with cars parked in the upper right of the image.