BTW, Your website is more than a bit broken
(Images missing, Javascript not in the menu/ directory etc etc)
Matt

You'll find that the Cobra probably supports M, A, and TTL flash.

Current Pentax DSLRs support M, A, and P-TTL
They don't support TTL at all.

Sooooo, although it will function, you won't get fully automated metering of P-TTL (the preflash variety). It depends on what you intend to do with it as to whether that's a problem.

Matt

I've had it happen a couple of times on the *ist-D, and possibly once on the K10D...

I would check which version of firmware you are running (the latest at the moment is 1.30) and upgrade if you're running an older version

Hold down the MENU button while powering up the camera and it will show you the version of firmware.

Firmware available from here: http://www.pentax.co.jp/english/support/digital/k10d_s.html

As George says (and I know from bitter personal experience... as I write firmware for telecoms devices) no matter how careful you are as a programmer, there's always a minor bug or two lurking (and not surprising and the source code would probably be measured in hundreds-of-thousands-of-lines of source code :shock

If it still frequently goes AWOL after a firmware upgrade and resetting to factory defaults, then yes, a return to Pentax might be in order... but they'll tell you to upgrade and reset first

HTH!
Matt

Just make sure you've got firmware 1.30 for a start.
('Twas me that did the guide too!)
Matt

The maths sound about right Liam

FYI, the topic is here:
https://www.pentaxuser.com/forum/viewtopic.php?t=4950

Wish I could post some AF360/AF540 shots I did recently... have to get approval first though. But, yes, as George says, you've got to understand what's actually happening and in my experience it's rare that the AF540 and AF360 get it wrong....

... assuming you are using them within their limits.

All too often people slap a flash gun on the camera and expect it to magically solve every lighting condition.... a bit like expecting a pocket torch to light up the whole house and blaming the torch when it doesn't

Have a read of the thread and see if it sheds any more light (pun intended!)

Matt

And I try not to think about what I'm missing
Matt

Welcome

BTW, the 24-90 on the K10D is lovely Especially for portraiture (and even more so with studio lights). Stonkingly sharp and a very usable lens indeed!
Matt

I'm not so sure there'll be a problem when using it in A or M mode.
Might be able to check somehow...
Matt

Who knows...

...and they might be sharper in JPG mode too

To add to this...
To be honest I can't justify upgrading from the K10D. Sure, I'd like higher ISO and a few more pixels and a couple of extra features, but I'd rather spend the money on better glass (like the DA*).

So I wonder just how many K12D (or whatever) Pentax will actually sell when the superb K10D is such a crazy low price? Most enthusiasts will probably stick with the K10D, and maybe only some of the pros will switch.

Perhaps it's more of a C&N bait than an upgrade path??

But either way, unless there are lenses that can actually be bought, and a service commitment to back it up I do wonder how many real pros will take the Pentax-plunge

Matt