Re: Official Nikon 400/2.8S image thread + some discussions
philwaring wrote:
What's the procedure for reporting bugs to Nikon?
I found a really niche one using the 400Z, Recall Shooting Functions set to just disable subject detection and the menu option B7 (Keep exposure when f/stop changes) set to use ISO.
Suteetat/George: Could either of you try doing this?
1. Set a custom function button (I'm using the lens function buttons) to recall shooting function where the only selected thing is to disable subject tracking.
2. Ensure B7 is turned on and to compensate with ISO
3. Have the lens in manual (and not auto-ISO) at f2.8. Lets say ISO 500 and 1/100s.
4. Engage the TC - the lens should now read f4, 1/100s, ISO1000 (ISO has doubled due to B7)
5. Press the custom button for RSF (settings shouldn't change)
6. Change the shutter speed up or down a notch (doesn't matter as long as it changes)
7. Press the custom button for RSF again - At this point I will then see the camera switch to ISO2000 whilst I'm pressing the RSF button.
If I then flick back to no TC then this will still happen. If I tweak the shutter speed again back at f2.8 then it stops happening.
I think I might tweak my setup so that it removes subject detection but also engages auto-ISO. It's not going to be something I use too much anyway. I'd still like to see Nikon fix it sometime though in a firmware update.
In other news I used the lens with the 1.4x all day on Saturday and was flicking between 560/784 and it worked really well. I still want more experience but I'm leaning towards making this my default combo where I might want 800mm. I'd only ever really thought about using this as a 400/560 on safari (keeping a TC in the pocket) but I can totally see myself spending a morning in one configuration and then switching to the other for an afternoon drive just to get a wider variety of images.
OK, I can confirm that I have the same phenomenon. When pressing FN-L button for RSF, ISO went up again for some reason. On the other hand, I have a good grasp on why I would use B7 option yet. It seems that if I use auto-iso in M mode, iso will automatically adjust when I toggle internal TC on or off anyhow.
Interestingly, today my local dealer asked me to bring my 400/2.8S in as Nikon wanted to service the lens and replaced a part in internal TC toggle lever. There was an issue with this switch being too stiff on some initial batch of 400/2.8S that causes significant delay in release of 400/2.8S from initial February launch. Apparently now they came up with a new whatever part in the lever that does caused the problem. I assume that all the lenses that are released within the past week already have this part replaced. I decided to go to Nikon service center myself as it took just as long to go to my local dealer. This way, I just hanged out there for an hour and got the lens back right away rather than having to go back to my dealer later for it.
My lens' toggle lever initially is very light with very little resistance to flip. After replacing the new part, the lever is slightly stiffer, seems a bit more snappy if anything and slightly louder sound of internal TC slapped into place, I think.
I was told that the initial gear is slightly looser than the new part that they replaced ( I now assume that they replaced a gear).
Supposedly Nikon did not release any lens that have the stiff lever but plan to recall all the lens that was released in February to replace this part, just in case.
Apr 12, 2022 at 07:51 AM
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