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"RE: Understanding Macro Lens Apertures (Micro-Nikkors)..."
>then why is it not called a f/2.8-5.6 lens because it changes apertures like on a cheaper zoom lens?Actually it does not change PHYSICAL aperture whereas a variable aperture zoom does.The effective aperture is what changes in extreme close up work with any lens.Nikon have a useful explanation http://nikoneurope-en.custhelp.com/cgi-bin/nikoneurope_en.cfg/php/enduser/std_adp.php?p_faqid=13945&p_created=1116592086&p_sid=ul9qIfoj&p_accessibility=&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MTMmcF9wcm9kcz01NDQsNTQ1JnBfY2F0cz0yNDEmcF9wdj0yLjU0NSZwX2N2PTEuMjQxJnBfcGFnZT0xJnBfc2VhcmNoX3RleHQ9QXBlcnR1cmU*&p_li=&p_topview=1
Photography is a bit like archery. A technically better camera, lens or arrow may not hit the target as often as it could if the photographer or archer does not practice enough.Len Shepherd