Nikon AF-S VR 500mm f4G test
by Ole Thorsen
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EFS 17-85mm IS f4-5.6 Err 01 Err 99
by Barry S Moore
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Aperture Tests at Two Focal Lengths
by Teresa Binstock
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Depth of Field in Macro Photography
by Charles Durrant
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Lens comparison test
by Charles Beauchemin
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MTF Curves for Canon Lenses
by Samir Kharusi
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Focal Lengths and Deep Sky Astrophotography
by Samir Kharusi
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TAMRON SP 500mm F8 mirror lens
by John Farrar
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Visiting Canyons in South of Brazil (2014)
by Joao Pedro Assumpcao Bastos
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Sigma 600mm Mirror Lens
by Charles Durrant
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