Yes I first heard of auras from the book Louis Matacia wrote and he said the sx70 polaroid could pick up treasure auras and I did work on a couple of auras caught with the sx70 which came out both green and red at a different sites (sadly those photos were stolen from me years ago). but just like with the optio aura locations there was zero doubt the auras caught with the sx70 were from treasures as the sentinels remarked those areas to death and they had the large boulder markers from the Catholics marking the spots as well. (This treasure site was one of the closest calls I had with sentinels)
Back in the 90s I was relegated to either the polaroids or film cameras and you could imagine shooting a thousand shots then pay for developing which got very spendy quick, so I decided to try different cameras from movie cameras to vhs-c and hi-8 tapes even some filming shoulder cameras which didn't work.
then in 98 my dad caught a huge aura with a canon film camera and two years later my mom caught an even bigger aura with the same canon film camera in 2000.
A friend gave me a aura picture that his friend gave him and he told me it was shot with a digital camera somewhere in the early 2000's so I bought a few different digital cameras which were expensive at the time as it was newish technology and I realized right a way I needed a camera that could stay in one spot and take shots by itself without me physically holding the shutter button down, I had windows XP back then so I could look at the digital pictures with them overlapping each other,(I had no luck at all with those cameras) It wasn't until around 2010 or so that I finally picked up a optio w10 and I believe it was on my second time I set up and took a thousand pictures that I caught my first real aura with real markers and sentinel planted markers which is what I show the alignments going to the crisscross spot in the end of my guide all the way back at the beginning of this thread (I have caught many since then with the optio) so there you have it my journey to this point of aura capturing.