I would just do a little bit of mental arithmetic (or trial and error!)

A small point (I may be wrong) but I think even the digital lenses are marked up with a 35mm scale - so you may have to do some sums even if you are using a 'digital' lens

hope thats of use

i think one of the most useful custom settings for me is 'ok button when shooting' - I've set it so that it turns on spot AF - very useful if you know the af might get confused or not know where to focus

I second that - hold a tennis ball under the lens and bobs your uncle. I don't have a k10d , but i liked this- from my dl2.

http://www.pbase.com/mr___ist/image/73233922/original

Hi pete - if you only noticed it when you took off a lens the likelihood is that the mark is not big enough to be seen through the viewfinder, and it isn't going to affect the image. I think (if you can live with it) I'd just leave it; the surface of the mirror is more delicate than you'd think

as to where it came from - I've no idea either!

thanks for all the input guys. daniel - the film dial is set to 400, but after what mongoose said I may jsut live with it by adjusting the ev to suit.

Thanks for the super quick replies It looks like my (old) ricoh kr-10 may have a problem (apologies its not a pentax ). I just mounted it on a tripod, pointing at a wall. focussed the lens at f2.8 and got 1/125 on the meter. Exactly the same lens on my dl2 at f2.8 gave me 1/250.
good point about the batteries - I'll check that, although for the moment leaving the ev on the kr-10 to -1 would sort it would it not?

I wasn't quite sure where to put this post - but here goes. I decided use one of my film slrs again. Loaded it with iso400 film, and seemed to get stupidly high shutter speed readings from the meter. I then set my DL2 to iso 400 and pointed it at exactly the same subject. I got a completely different reading from what I know is a reliable meter. so, is it daft to try and compare the iso 400 of film to digital iso400? ie is ISO a universally graded scale or is it arbitrary (might the meter on the film be ok)?

I hope that makes sense

http://www.currys.co.uk/product.php?sku=717373&camp_id=froogle

Does this surprise anyone : I haven't used the pentax version but if the only differences are the absence of an SMC coating and the different barrel design I may way go for it...

Thanks for all the comments - I definitely did use a tripod With such a long expsoure I probably should have thanked those people for staying as still as they did!