This product does exactly what I expected. It seems to work best at longer focal lengths. Flares require a bright light in frame. I would note the return policy before purchasing -- there are no refunds, only store credit minus shipping and a 20% restocking fee. You also cannot return without an RMA (meaning a person approves it, you can't do it independently). You also only have 7 days to request it, which is the shortest return window I've ever heard of.