NikonGear'23
Gear Talk => Lens Talk => Topic started by: mxbianco on April 07, 2020, 19:01:17
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New firmware has been published on the Nikon Download center for lens Nikkor-Z 24-70/4. (here: https://downloadcenter.nikonimglib.com/en/download/fw/322.html (https://downloadcenter.nikonimglib.com/en/download/fw/322.html))
When camera is turned off, the new firmware sets the aperture to an intermediate value (about f/8). Previous version used to park the aperture at smallest opening (f/22)
I applied the update, a short photo description of the process:
Photo 1: camera off, aperture fully closed, before applying the update (zoom @ 24 mm)
Photo 2 (composite of 4): Programming the firmware
Photo 3: camera off, aperture intermediately closed, after applying the update (zoom @ 24 mm)
Photo 4: camera off, aperture intermediately closed, after applying the update (zoom @ 70 mm)
Note that if you remove the lens without turning off the camera, the aperture will stay fully open (@f/4). Another good reason for turning off a camera prior to removing a lens!
Ciao from Massimo
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Thanks! I wonder though: what is this useful for? Why does it make aperture control more reliable?
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Maybe opening the lens from f/22 to f/5.6 (the normal aperture for viewing) takes time when the camera wakes up. Thus starting from f/8 instead would imply lesser lag before the camera is ready?
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I suspect there is more strain on individual aperture blades when aperture is left in the fully closed position for long periods of time (=camera off). An intermediate position could preserve the functioning of the aperture for a longer time.
BTW, I have actually seen blades bending out from a horizontal plane in vintage optics which have extremely small apertures (f/90, F/128) when you try and close the aperture to its smallest (higher number, it's a reciprocal)
Ciao from Massimo