User Activity

I might use a diffuser for a speedlite flash but I don't know which one to use. I mostly use the Canon R6 Mark II for indoor photography for baton or dance (ballet) in dark theater settings. But I also do portraits as well under trees, etc. Any recom...
I currently use a Canon T5i as well as I purchased it around 2013.  I have recently found out that if I push the ISO to its max (12800) inside elementary school gyms my shutter speed is still horrible hovering around 120. I also tweak my white balanc...