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I only take pictures for my own pleasure while I travel and stuff so I really only know the absolute basics, sorry if this is an exceedingly stupid question.
I like to take a lot of straight on angles of things like pic related, and if its a really big object the top curves in, like a really subtle fisheye. I know it is caused by the curvature of the lense, but are there lenses that will reduce this? Or do I have to do it in photoshop?