It may be a bit out of date,and I am new to the forum, but if you haven't seen the US Army guy dust up and then wash off his cameras in the shower then you should take a look.
The site is DPREVIEW and go for the Pentax SLR talk/bookmarked area.
It is on youtube.com/watch?v=Eo615fH6Qw.

Don't need a raincape after seeing that.

Used those plus condoms with my old 35mm Minolta, worked ok but go a lot of funny looks.
Just had a thought!! A vets long glove, the ones they use for internal examination of cows etc. Might fit a 645. Will give it a try and report.
Thanks for the trigger B.

Brilliant,stunning and inspirational, what more could be said?
I must try harder, much harder
Thanks Ken.

Morning All, Been hunting around for a new rain cape, fair bit of stuff out there with various ratings. Kata and OpTech seem ok but wondered what the feeling was at the 'coal face' so to speak. Having spent a few hard earned quids on my kit I want something that realy works.
Anyone with 10/10 for something?

This may be a little out of date for you now, but I used a full range of Cokin XPro on my 645n. I have recently purchased a 645D and I been playing about with them to see the effects etc. I can assure you they are still a valuable tool/accessary, in particular as John says, the grads and circular polarisers. Don't be afraid to have a go, you will create some spectacular images as well as some c--p good only for the bin. That's one of the great beauties of digi. You don't need to spend hours in the darkroom.
Have fun and good luck.

Thanks to you all for the welcome.
Just moved from 645N to D and going slowly up the curve.
Finding the Silkypix software a bit of a pain though. Anyone up to speed on this please give me a shout. Might have to stick with Photoshop.
Still do film with my Dynax9, can't bear to part with it, it just keeps on going.

Hi, Any MF users out there, East Anglia especially?
Please get in touch.