Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will this difuser work with the Pentax K-x digital camera? Thanks!
Document: So far the bracket is holding up just fine and it fits into my hot shoe without any issues. I have also seen it work on the Pentax K-X, but can't really speak for other camera makes / models.
This isn't a product that is going to work miracles by any means, but what it will do is make that pop up flash much more usable. I attached it to my Pentax K-7 without issue and the results were immediate and pleasing. It will make skin tones warmer, soften shadows, and reduce the chance of blowing out highlights. In many cases I find that I need a higher (bracketed) flash for shooting events, and it won't replace that, but for casual shooting I've found it to be great.
Given the limited effectiveness of the original I wish I had tried the Opteka knock-off first at less than half the price for more options.Opteka Soft Pop-Up SLR Flash Diffuser for Canon EOS, Nikon, Olympus, & Pentax On-Camera Flashes with White, Blue (Cooling), & Orange (Warming) Screens
When I first saw the Puffer I knew I wanted to have it. However, my old digital camera (Panasonic Lumix DMC-FZ28) did not have a hot shoe mount to use the Puffer with. Once I got my Canon T3i, this was the first accessory I bought. While saving up for a good professional hot-shoe flash, I'm using the pop-up flash and the Puffer makes my photos look amazing.
I just got this for use on a new Pentax K200d. It fits fine and softens harsh flash effects at close range. It doesn't seem flimsy to me, but as a previous reviewer stated it's only plastic. Mine fits tight in the hotshoe, but seems to be loosening up a little with use. I simply insert it in the 'shoe until it's snug and not necessarily all the way in.My only criticism so far is since it's fairly rigid it's a little inconvenient to carry in a small bag. It does fit in a shirt pocket while not on camera.Highly recommended for improving the camera's popup flash effect.
This diffuser fits right on to my camera (PENTAX K-5 II) easily, creates beautiful soft light shots. I don't understand why people have said the plastic is cheap on it? The entire product is strong, sturdy and easy to take apart and store. You will have to get a little closer in portrait shots for the right amount of diffused light. Practicing with how close you need to be and which lenses you are using will help solve any issues you have with the diffuser.
Bc it IS useful to soften flash in your average snapshot. It's great for when you need a fill flash but you know it will be too close and harsh. Use it selectively, and you may find you really like it, as I do. And DON'T use it as an excuse to shoot with flash "on" all the time; I don't imagine you'll be happy with the results of that. There ARE generic version out there; I wasn't aware of them when I bought this. There are also other types of cheap/inexpensive/portable diffusers (like this:Opteka Universal Soft Screen Flash Diffuser for Canon, Nikon, Pentax, Olympus, & Kodak On-Camera Pop-Up Flashes) that you can try.
When I need flash I use the Puffer but at the same time I really wish I had a faster lens instead.If you're looking for a pop up flash diffuser you might want to check out the one sold on ebay too. Search for "Soft Box For On board Flash". Also called the "Shoestring Studio OnBoard Flash Diffuser". It works a bit differently but I think it might have better results. The trade off is a less convenient attachment method. I might give it a try next.EDIT: It looks like the diffuser I was talking about is now available on Amazon too.Flash Softbox Diffuser for Digital or Film Camera Photography Fits on Board Flash
so glad I bought this!!! My external flash gets overheated a lot and I have to use the pop up and this is just wonderful thanks!
It doesn't work on my Canon EOS 1100D camera, because the build-in flash don't work if something attached in the hot shoe.
Answer: If it has the slot for an external flash it should fit just fine.