Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your time.

Want to protect your lens, but don't waste your time with this product. Made from plastic & difficult to thread a filter on, but this is not the worst aspect. Conversion adapter is larger in size (moving to a 58mm diameter) and actually will cast a shadow when using a flash for closer images. It appears as a brown discoloration on the bottom of the image. Removed adapter and there is no shadow. Money would be better spent on a new camera that is already threaded for a filter / snap cover.