[jqjones]

As the title says,

I'm looking at a AF-400 flash and an AF-280 flash.

I'm not a big one on understanding the guide numbers and such. So, I was wondering which one is a better deal.

Thanks guys, as always you all are awesome.

[Ash]

What camera will you be using it with?
And are you getting them for TTL capabilities?
If so, they're not so good for the dSLRs after the *ist D range - no TTL provision, only P-TTL (ie. FGZ flashes required for auto TTL).

[SOldBear]

I assume you're referring to AF-400T and AF-280T (there are other AF-400 models with significant differences).

In terms of interfacing with the camera body, they are similar.

The most obvious difference is that AF-400T is handle mount, AF-280T shoe-mount. AF-400T is bigger, heavier, and more powerful.

You should download the manuals and decide for yourself:

Manuals and Literature - Official PENTAX Imaging Web Site

[jqjones]

I'll mainly be using it on my K110, I'll hopefully be getting a new body soon.

I'll mainly be using to replace using my built-in flash, I'm mainly looking to bounce it off of walls for various reasons/effects.

[jqjones]

The most obvious difference is that AF-400T is handle mount, AF-280T shoe-mount. AF-400T is bigger, heavier, and more powerful.

You should download the manuals and decide for yourself:

Manuals and Literature - Official PENTAX Imaging Web Site

Thanks for the link, I knew the AF-280 was shoe mount, guess that makes the decision for me.

[SOldBear]

The AF-280T (and AF-400T) does not support P-TTL. But the interface with Pentax K series DSLRs is excellent.

Set the flash to A mode and the camera body to P mode. The camera will change its settings to match with those on the flash - something my K10D can't do with the AF540FGZ (I don't trust P-TTL).

I have an AF-280T and its little brother AF-200T. I like them.

After getting your flash, if you have any question, just post.