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perspective - What is ideal distance to subject for head and shoulder portraits? - Photography Stack Exchange
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35mm, 50mm, 85mm Comparison | Lens Review - shanelongphotography.com
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Angle of view - Wikipedia
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Amazon.com : Canon EF 85mm f/1.4L IS USM - DSLR Lens with IS Capability, Black - 2271C002 : Electronics
Canon EF 85mm f/1.4L IS USM Lens Review
35mm vs 50mm vs 85mm Lens Comparison for Portrait Photography - YouTube
How Much Bokeh Do You Lose When Leaving Full Frame – FUJILOVE MAGAZINE
Depth of Field: The Definitive Photography Guide | PhotoPills
Lens Rentals | Blog
focal length - How much distance should one move so that a shot that can be framed at xx mm be framed at yy mm? - Photography Stack Exchange
Calculating the minimum and maximum distances for macro close-up lenses: Macro and Still Life Photography Forum: Digital Photography Review
The Essential Guide to Video Camera Focal Length | Artlist
Comparing 85mm vs 135mm Lenses for Portrait Photography
Amazon.com : Canon EF 85mm f/1.4L with UV Protection Lens Filter : Electronics
4 Reasons the 85mm is Perfect for Portraits & How to Use It
What's Canon 85mm Lens Good For And Which Is The Best Lens For You?
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Lens Rentals | Blog
35mm vs 50mm vs 85mm TESTED & Compared - Lapse of the Shutter
