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<blockquote data-quote="WayneF" data-source="post: 544401" data-attributes="member: 12496">OK, but my experience is that reported distance is typically not accurate enough for any use.&nbsp; A Nikon 16-85 mm lens may report from 37% to 157% of the measured distance (depending on zoom and distance).&nbsp; A Nikon 12-24 mm lens might say infinity at 5 feet 24mm,&nbsp; or 37%&nbsp; at 20 feet 12 mm.&nbsp; The DX lenses seem worse, my FX zooms are often within about 20% (less expense spared probably).&nbsp; But short lenses like to report infinity.&nbsp;I don't find that useful at all.&nbsp; I don't really care about distance proper, I don't need a number.&nbsp; My big complaint is that it sure messes up TTL BL direct flash (if using Nikon flashes).&nbsp; If the D-lens says distance is 37% of what it is, and so thinks TTL must be overexposing for that incorrect short distance, then it will cut the light down to be correct for 37% of the distance (imagining that it is preventing overexposure). We of course blame that on the flash, but the flash is merely a victim, the camera does all of the metering and control.&nbsp;&nbsp; And it could even be a plus, if the distance is ever correct (it would be a poor bet though).&nbsp;I wish there were a menu to disable D-lens distance from affecting flash (it only&nbsp; affects TTL BL direct flash).&nbsp; We can choose TTL mode or FV Lock or use Commander to ignore D-lens distance (or tilt the Nikon head).&nbsp;&nbsp; But third party flashes like Yongnuo do not have the the head tilt switch, so metering does not know if they are bouncing or not, so camera dares not mess with them, so this makes them immune from this faulty D-lens tampering.&nbsp; IMO, third party flash seems the way to go.</blockquote>

[QUOTE="WayneF, post: 544401, member: 12496"] OK, but my experience is that reported distance is typically not accurate enough for any use. A Nikon 16-85 mm lens may report from 37% to 157% of the measured distance (depending on zoom and distance). A Nikon 12-24 mm lens might say infinity at 5 feet 24mm, or 37% at 20 feet 12 mm. The DX lenses seem worse, my FX zooms are often within about 20% (less expense spared probably). But short lenses like to report infinity. I don't find that useful at all. I don't really care about distance proper, I don't need a number. My big complaint is that it sure messes up TTL BL direct flash (if using Nikon flashes). If the D-lens says distance is 37% of what it is, and so thinks TTL must be overexposing for that incorrect short distance, then it will cut the light down to be correct for 37% of the distance (imagining that it is preventing overexposure). We of course blame that on the flash, but the flash is merely a victim, the camera does all of the metering and control. And it could even be a plus, if the distance is ever correct (it would be a poor bet though). I wish there were a menu to disable D-lens distance from affecting flash (it only affects TTL BL direct flash). We can choose TTL mode or FV Lock or use Commander to ignore D-lens distance (or tilt the Nikon head). But third party flashes like Yongnuo do not have the the head tilt switch, so metering does not know if they are bouncing or not, so camera dares not mess with them, so this makes them immune from this faulty D-lens tampering. IMO, third party flash seems the way to go. [/QUOTE]

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