Sunpak pz 4000 af

If you're asking about the trigger voltage then yes, you may use the PZ4000AF with your D5100 with no harm. If you want to know about something else, please ask the question.

The 550 FD came out before digitals. It is fully dedicated(FD) to a type of film camera. Usually this is noted on the back of the flash. CA or C for Canon, MI or MX for Minolta, Ne or NI for Nikon. If its the Nikon dedicated unit, it should not harm your camera, and will most likely work...as a manual flash. You will lose all the neat flash stuff that the D5000 can do.
I suggest you watch Ebay for a Sunpak PZ-30, PZ-40, or a Sigma 430 or 500. The Sigma EF 500 Super will do pretty much everything the top of the line Nikon Flash does, but you can buy it new for half the price of the Nikon unit. All flashes today are dedicated to a certain group of cameras by a certain manufacturer. For example: Canon EOS film cameras or Minolta manual focus cameras.
I suggest you get rid of the 550FD as it is designed for the pre-Autofocus cameras.
Avoid the Sunpak Auto 30DX, the 333, 383, 433, 444 and the PZ 4000/5000 as well as the MZ flashes. These were not designed for your new digital.
Metz also makes some very nice flashes, but they're kinda pricey.

The Sunpak PZ 4000 and 5000 were made for film cameras. I have one for my EOS film cameras. It works just fine. I know this series of flashes was not made for the digital cameras. It likely will not harm your camera if the flash is designed for your camera brand. But some functions will not work.
For example, do not use a flash for Minolta on a Nikon.
You risk damaging your cameras electronics or frying the flash.
Get their PZ 20, PZ 30, PZ40 or PZ 42X for your digital camera.

The Sunpak PZ 4000 and 5000 were made for film cameras. I have one for my EOS film cameras. It works just fine. I know this series of flashes was not made for the digital cameras. It likely will not harm your camera if the flash is designed for your camera brand. But some functions will not work.
For example, do not use a flash for Minolta on a Nikon.
You risk damaging your cameras electronics or frying the flash.
Get their PZ 20, PZ 30, PZ40 or PZ 42X for your digital camera.

Yes, you can use Ni-mAh re-chargeable batteries with Sunpak Pz 4000

Canon digital uses E-TTL metering for best flash results, the older Sunpak unit isn't compatible with this, so it is not fully compatible. It may work in manual mode - but won't be as good as a more modern compatible digital flash like the Canon or Metz (eg 58AF1 Canon) versions.

It would help if you actually gave details of the lens!

All the old Minolta AF and MF lenses will fit the Sony A100, but only the AF are auto-focus compatible.

Since the Maxxum 7000 was an AF camera, I would image that that is an AF lens pictured on the front.

Check out this site for more details:

http://www.mhohner.de/sony-minolta/lenses.php

Matt

Virtually all the old Minolta lenses are compatible with the new Sony SLRs.

For the two you mention, you will need to check whether the lenses are the AF or MF versions.

Both will fit, but AF is the auto-focus one, and MF is (obviously!) manual-focus.

If you want a definitive list with tech details on ALL the Minolta / Sony lenses, look here:

http://www.mhohner.de/sony-minolta/lenses.php

Matt

Hi,

The Alpha 100 only supports pre-flash TTL and ADI flash control which are not supported by the Sunpak. The flash should ignite, but automatic controlling of its brightness is not possible.

For more Information about the different Minolta/Sony Flash Metering modes cf. http://www.mhohner.de/sony-minolta/flashcomp_mm.php

Usually mounts are unique to a camera manufacturer. There are exceptions. Sony has the Alpha; lenses for the Konica-Minolta are the same mount. Your AF (autofocus) lens will work on it. You might also consider picking up a Konica Minolta 5D or 7D.....they're no longer made and hence are cheaply had.

The MD and Rokkor lenses won't work on the Sony Alpha.
THIS IS A CHEAP LENS (<$50 VALUE) SO I WOULDN'T LET IT DRIVE YOUR DECISIONS!!