Telephoto showdown: $100 Big Mike’s 500/1000mm Vs $1000 Sigma 150-600mm

A few weeks ago we went out to Huntsville State Park to get a chance to take some shots with the Sigma 150-600mm. It was awesome and we got some great photos. I thought it would be a great opportunity to use the 500mm manual lens I bought from Amazon a while back for the…

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