I can't get meter reading for my Nikon N75

Yes and no. It will fit and you can take pictures with it. You'll have to focus manually, of course, and you won't get any exposure help from the camera's light meter. You'll have to use the camera in the Manual exposure mode, setting the shutter speed on the camera body and the aperture by turning the ring on the lens and, as I said earlier, without any help from the camera's light meter.

On these cameras, if you're using ANY of the auto modes (P, A, S on the dial), the lense must be set to the lowest aperture setting (the highest number). Check to make sure this is the case. If it isn't, that's most likely your issue.

If you're using a non-CPU lense, this camera can only be used on M(anual) mode on your dial. If you haven't changed lenses this isn't likely an issue. If however you're using a new (to you) lense, this is a possibility.

According to the manual, the only other possibility is that your attached flash isn't set to the proper setting when using "P" mode. In this mode, the attached flash MUST be a Nikon dedicated flash unit set to TTL mode, otherwise fEE flashes with a little lightning bolt symbol. If you're not using a flash specifically designed for this model, remove it and try again. If you are, cycle the mode button on the flash until it reads "TTL" on the flash's LCD panel.

The manual makes no mention of fEE (error) and the battery indicator blinking, so these are the only things I can suggest with the information given.

Hi
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Click here to download First part of PDF Manual(Nikon N75 )
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The pre=flashes are for reduction of red eye and also for TTL indormation for camera to wotk properly with flash. Read Flash manual and some info in camera manual

Since SB-800 is a dedicated TTL flash, it doesn't need you to manually set the values. The flash can communicate with the Nikon cameras automatically in TTL mode.

Yes and no. I assume the lens is of more or less the same vintage as the N75? If so, the lens will fit onto the D5000. All of the camera's exposure and metering modes will work properly. However the lens lacks an interal focus motor and thus will not autofocus on the D5000. You can focus manually, and the green focus indicator in the viewfinder will continue to work.

No settings - the SB800 is automatic on the D40x - it meters TTL.

in the manual setting the SB-22s is just a standard flash and should work with a standard hotshoe.

Set the smallest aperture (largest Fnumber) and lock the ring. If the aperture ring doesn't have a lock, you have to switch to manual mode (M on the mode dial).

Sounds like a lens compatibility issue. Ensure that you have a compatible lens mounted first (see user guide) and then ensure it is set to its smalles t aperture (F22 for example), otherwise the shutter will freeze and the Error will be displayed.

Heres a link to the N75 / F75 user guide
ftp://ZUAB14RT:[email protected]/Manuals/M1GTMV8H/F75_En_02.pdf