AF confirm Chip "Dandelion" for Nikon *EURO* Original by Victor Luchnikov
Mar 22, 2017
Breathe new life into old MF Nikon glass
I've copied this list of pros and cons from pindelski's adding-a-cpu-to-mf-nikkor-lenses-part-i blog post.
The good:
Correct recording of lens focal length in EXIF data, except for zoom lenses.
EXIF data for focal length is posted in a searchable field in Lightroom, unlike manually keyed Non-CPU lenses.
You no longer have to worry about being limited by the amount of Non-CPU lenses a camera can store.
You no longer need to remember to dial in the correct Non-CPU lens.
Lenses which focus incorrectly, as indicated by the focus confirmation light in the viewfinder, can be fine tuned for optimal focus.
Ai and Ai’d lenses can be set so that aperture control reverts to the aperture ring on the lens, not the control dial on the camera, permitting correct exposure in ‘A’ and ‘M’ modes.
Ai-S lenses can be set so that aperture control is either with the aperture ring on the lens or the control dial on the camera, permitting correct exposure in ‘A’, ‘P’, ‘S’ and ‘M’ modes.
Exposure automation is no longer limited to Aperture priority.
Full matrix metering becomes available
Program and Shutter Priority exposure automation are added. Shutter Priority would seem especially useful for sports photographers.
Focus lock is an option – the picture cannot be taken unless the lens is correctly focused when focus lock is programmed ‘On’.
Enhanced fill-in flash capabilities are added.
On ‘pro’ bodies like the D700 the Command Dial wheels can be used to set aperture (in aperture priority mode) in preference to the aperture ring on the lens, the latter being left at minimum aperture at all times, like with an AF D lens. I confess I prefer to use the aperture ring as I support the lens with my left hand from below, but it’s an option.
A lens with CPU fitted permits the appropriate lens profile to be automatically applied on import in Lightroom 3/4/5 when using custom lens profiles.
Certain earlier Nikon DSLRs, which do not provide auto exposure when no CPU is fitted, will now do so, allowing the use of MF lenses on these bodies with full exposure automation.
Chipped lenses (programmed on a D700, for example) can be used with bodies – such as the D40 – that don’t allow input of non-CPU lens data.
Bodies with electronic aperture readouts in the viewfinder which do not otherwise report the aperture to which the lens is set will now report it if aperture control is passed from the body to the aperture ring on the lens.
Ai-S lenses ‘P’ and ‘S’ modes require the lens be set to its minimum aperture and control reverts to the body; correct exposure in these modes is retained, owing to the linear design of the aperture cam.
The Bad:
Ai and Converted Ai lenses ‘P’ and ‘S’ modes require the lens be set to its minimum aperture and control reverts to the body, but correct exposure in these modes is not guaranteed, owing to the non-linear design of the aperture cam.
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