Gear Talk > Camera Talk
Nikon Df non-AI stop-down metering
Bjørn Rørslett:
No chance. Nikon has been adamant regarding stop-down metering for many years. They will not allow it unless the lens lacks any aperture linkage and has a preset or direct-set aperture. Period.
I have discussed the topic with Nikon reps several times to no avail.
richardHaw:
this is for non-Ai lenses by the way :o :o :o
the person that I talked to (a bar buddy of prof Goto) said that they are aware of the complaint for some time now.
I do not exactly know what he means by that. it can be that they are aware and doing something or wanting to do something but they cant (because it's messed up). i am still hopeful. anyway, I am going to ask directly as to why they cant do it on the Df ::) im sure that im going to get alibis ::) i just want to see how far they will go and if they will tell the truth.
Bjørn Rørslett:
The "problem" that won't go away, and the underlying reason for Nikon not allowing stop-down metering, is the aperture linkage. AI vs non-AI is a minor consideration, that's all.
Roland Vink:
Stop down metering is possible with AI-compatible cameras if there is no aperture linkage to the lens. That's how the old Nikkor-T 10.5cm 1:4 works. For most other lenses however, you'd need to remove the aperture stop-down lever, which rather restricts their use.
Bjørn Rørslett:
My point, exactly. There is an inherent conflict between stop-down metering and the lever that keeps the aperture wide open. That is why Nikon never will allow this, unless the mechanical linkage is not present.
The only exception is of course with an E lens such as the PC-E models having their own preview control, because the camera "knows" that the preview lever is pushed in. The view in the finder then shows the stopped-down image, but the meter read-out stays put.
Metering at the wide open aperture is the preferred method anyway, as it is potentially the most accurate and sensitive.
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