Hi Dan,
I've used the correction option and at the max adjustment of -10 it's almost right but it's still a bit hit and miss.
If it turns out that the error remains the same whatever the subject distance then indeed I'll stop worrying about this issue and find something else to worry about.
Thanks for your promp advice Dan, enjoy the rest of your day.
Cheers,
Gene Stevo.

Hi Chaps,
On my newly aquired K-7, my Sigma 30mm EX DG front focuses by approx' 2cm when wide open (f1.4) at min focus distance (40cm).
Example of test shop link
My question is this. When used at more realistic distances, say 2m, will the front focus error remain at 2cm or will the error be exagerated by increased distances between subject and image plain?
Cheers,
Gene Stevo.
(BTW, yes I have seen the correction option in custom settings, thanks anyway).

When I was 14 I bought a Zorki-4 rangefinder (f2-22, 1/1000 shutter) my pal bought a Zenit-B SLR (f2.8, 1/500 shutter). I won, until I saw he could advance a full frame by moving this lever thing, once!
Wanted an SLR ever since.
Aged 50 I thought I'd treat myself to a proper camera. On advice from a guy in Jessops (honest) I bought K100D +18-55 kit and the ubiquitous 70-300 Tamron 1:2 macro. Along with all the other "essentials" now also have Sigma 30mm f1.4 EX DG and Sigma 10-20mm EX DG which is on the body nearly all the time for indoor surveying work.
A couple of years later and I'm ready for the plunge for something with more switches/buttons and less need to dive into menus.
From reviews read so far (all very positive) the K-7 seems to fit the bill.

I don't suppose somebody should tell Pentax UK they have a new camera?
http://www.pentax.co.uk/en/Photo_Digital_SLR.html

It's not just the handbag though, it's the added cost of matching shoes, belts, jewellery etc...Woman are such spendthrifts...I just want some SDM lenses to match my new body

http://www.amateurphotographer.co.uk/news/Pentax_K7_UK_price_released_news_28292...
Also shows kit options

I really want one. Want more switches-less menus (k100d user).
However yanks are paying $1,300 which is £ 830 at todays rate. Why then is UK price £ 1,200. What am I missing here? Or are our overseas cousins just getting a better deal yet again?
Please tell me to get over it, I really want an upgrade before the wife finds my cash

Love them all, esp the big budgie. What obliging models you have in Memphis

Lovely and sharp esp' the feet!
1/200th at 420mm? Another golden rule bust then

I've just ordered MattMatic's flash guide.
No doubt I'll be back with even more daft questions...
Cheers guys,
Gene Stevo.