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<blockquote data-quote="aroy" data-source="post: 365588" data-attributes="member: 16090">If the tubes have no electrical contacts, then the camera will display &quot;no lense attached&quot;. You then have to set the mode button on M and shoot manually.I would always go for &quot;Automatic&quot; extension tubes, which have contacts, hence AF and metering will be possible. The Polaroid are around $75, while the Kenko are around $175.<a href="http://www.amazon.com/Polaroid-Focus-Extension-Digital-Cameras/dp/B004VNH18Q/ref=sr_1_2?s=electronics&amp;ie=UTF8&amp;qid=1412944647&amp;sr=1-2&amp;keywords=Polaroid+Auto+Focus+DG+Macro+Extension+Tube+Set+for+nikon" target="_blank">Amazon.com : Polaroid Auto Focus DG Macro Extension Tube Set (12mm, 20mm, 36mm) For Nikon Digital SLR Cameras : Camera Lens Extension Tubes : Electronics</a><a href="http://www.bhphotovideo.com/c/product/375238-REG/Kenko_AEXTUBEDGN_Auto_Extension_Tube_Set.html" target="_blank">Error</a>As the extension tubes are just metal tubes with contacts, as long as they are sturdy and properly machined, it is fine.</blockquote>

[QUOTE="aroy, post: 365588, member: 16090"] If the tubes have no electrical contacts, then the camera will display "no lense attached". You then have to set the mode button on M and shoot manually. I would always go for "Automatic" extension tubes, which have contacts, hence AF and metering will be possible. The Polaroid are around $75, while the Kenko are around $175. [url=http://www.amazon.com/Polaroid-Focus-Extension-Digital-Cameras/dp/B004VNH18Q/ref=sr_1_2?s=electronics&ie=UTF8&qid=1412944647&sr=1-2&keywords=Polaroid+Auto+Focus+DG+Macro+Extension+Tube+Set+for+nikon]Amazon.com : Polaroid Auto Focus DG Macro Extension Tube Set (12mm, 20mm, 36mm) For Nikon Digital SLR Cameras : Camera Lens Extension Tubes : Electronics[/url] [url=http://www.bhphotovideo.com/c/product/375238-REG/Kenko_AEXTUBEDGN_Auto_Extension_Tube_Set.html]Error[/url] As the extension tubes are just metal tubes with contacts, as long as they are sturdy and properly machined, it is fine. [/QUOTE]

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