Yes including: Automatic Balanced Fill-Flash (with AF Nikkor lenses/Standard TTL Auto including Programmed TTL Auto.
Yes. Be aware that it is a manual flash, so you have to set the power settings manually.
Yes, the Nikon SB-26 flash will work with the Nikon D7100, but it will be in manual mode only. The D7100 does not support the older Nikon CLS (Creative Lighting System) features that the SB-26 uses for automatic flash exposure. To use the SB-26 effectively, you'll need to manually set the flash power and adjust settings based on your shooting conditions.
Generally yes, but there are exceptions. It depends on the specific flash.
Actually no they won't. I don't konw alot about canon cameras. but one thing I do know is that it prabably won't work. Just get a Canon flash or a Sigma flash.
Yes it does with non i-ttl auto (2 different f stops) and manual.
Yes it does just got one in the mail today. Tried it out and it works fine.
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]
nikon or keh
Yes it will. It will work in auto and manual modes. TTL does not work.
yes
The Nikon SB-20 speedlight is not fully compatible with the Nikon D70. While it can physically mount on the camera, the D70 lacks the necessary TTL (Through The Lens) metering support for the SB-20, which is designed primarily for older film cameras. As a result, you'll need to use manual settings on both the flash and the camera to achieve proper exposure. For optimal performance, it's recommended to use a flash that is specifically compatible with the D70.
The older Achiever 632T Auto Thyristor flash unit can work with a Nikon D3000, but caution is advised due to the potential for high trigger voltage from the flash. Many older flashes have trigger voltages that exceed the safe limits for modern digital cameras, which can risk damaging the camera's circuitry. It's best to check the flash's trigger voltage and compare it to the D3000's specifications or use a voltage-reducing adapter if necessary. Always test with caution to avoid any damage.