Anybody have any examples of the aura effect at all? Is there any? Or do you have to go to the opaque filters (89-87) in order to get the right wavelengths to create the halo effect? In other words, I'm wondering if visible light would cause the AURA emulsion to blow out before you got any halos, while going true IR filtration would create the right environment. I really want to use the film on my large format camera, but focusing is such crapshoot with IR and my old equipment that isn't perfect. I was told I only need a fraction of a mm closer to the subject and I got back the negs and they were blurry. I want to shoot wide open for the shallow depth of field, so I feel like Red 29 is the best for me. But I want that halo effect. What about the 70 filter?