BetterPhoto Instructor Insights: How Can I Preview the Exact Depth of Field?: "Question: I have some understanding about depth of field, but when composing a photo with my Canon EOS T4i, how can I see what will be in focus and what will not? No matter what aperture I set, the scene looks the same through the viewfinder and also on the LCD screen in Live View. Also do telephoto lenses have less depth of field than wide angle lenses?"
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