Yes in non i-ttl auto and manual
i bought one....doesn't appear compatible
Yes it will. It will work in auto and manual modes. TTL does not work.
Yes but only with manual focus.
the current nikon speedlight range is thus: SB-200 SB-600 SB-800 SB-900 All will work with the Nikon D300s Older speedlights will also work, but without i-ttl mode.
Yes. The Nikon D40x has a hot shoe on top of the built-in pop-up flash. Be sure to check the compatibility of any external flash unit that you attach to the camera. Note: The question was changed after the first answer was posted, so that the two do not match now. An approach to the new question is that a Nikon D40x is an entry level DSLR, and you may want a flash in that price range. Suitable units are marketed by Nikon, of course, and by Sigma, Sunpack, Vivitar, and Quantary. Features vary with specific models, so you will want to investigate the features-per-dollar for the various units. [spelvin]
ifNikon d90 digital slr camera on auto mode can we use flesh sb600 on this mode or only manual mode
Yes, it will fit. However, you will still need to see if the lens you have has or does not have features like autofocus or CPU connectors that will carry all the info that your camera needs... If it is a Nikon Lens it will work fine. So will others like Sigma, Tamron and Tokina. Carl Zeiss may not give you all the functions but will work in manual mode.
nikon or keh
yes
I have this camera, and I also have the SB-24. I have tried to work them together, and it just won't work. The Sb024 would zoom in relation to the lens focal length, but it does not do this, and the firing of the flash would not work. Save it for your old Nikon - like an N90s or something similar. It's worthless on this digital body.
It works but no auto focus just manual focus.
A Nikon EM has a standard Nikon mount, so you can use any lens that'll fit on a Nikon, except for a Nikon Series G lens, on an EM. A Series G will fit but it won't work because there's no aperture ring.