[quote="Mannesty"]You can do the same in P mode too! Though yo would then need to go the the Fn menue return to Auto ISO mode.

Sv mode allows you to change ISO from the rear thumb wheel. Works for me when I am happy for the camera to set apature and shutter for me.

Having looked at the thread, I feel a little hoodwinked by the shop I bought my lens from! I always used to use a Skylight 1b on film and continued with the same practice for my digital lens. I think I was sold a £30 filter because they could, not because I needed one!

I am going the wait for the next clear sunny sky and do some tests!

Hay, this is great, I didn't even know I needed to know this!

The best shop I have come across is at the top end of Tottenham Court Road just down from Warren Street tube station on the RHS of the road going towards Oxford Street. Sorry I cant remember the address or the name of the shop but it had a good stock of Pentax and compatable equipment and some sound advice. Well worth a look.

This works best with firmware version 1.3 and the latest Pentax Remote assistant.

It also allows you to control the camera settings.

Transfer Mode on the Set-up menu will need to be set to PC.

I have also found the Pentax K10D Magic Lantern Guide very good for specifics on the operation of the camera and its menu functions. Even after using the camera for over 6 months before I got the guide I found there was much still to learn.

I would also take the lens and test the function in the shop!

On my K10d, the appature will not be stopped down on older lens set to the appature unless I am in Manual mode.

I would lets the function first with the digital priview option.

If the lens is set to 'A' then it should work - use apature priority mode to check.

I have taken photos in pitch black with my K10D and the built in flash. This strobes to light the scene and aid focus. I assume a compatable flash should do the same thing.

The red grid I am aware of was I though, infrared, and I believe the K10D can't see infrared though I might be wrong.

I use the Lowepro Slingshot 100AW for my K10D (it should take it with the battery grip attached by my measurements) and an attached Sigma 18 to 200. I also cary a 50mm 1.4, the kit lens and the small Pentax slave flash with room to spare. I can get a subset of my filters and Cokin holder in the top pouch too.

The nice thing about this bag is that is is small and can take up to 3 addational 'Slip lock' pouches should you need a little extra space. I have yet to find a way to add my compact tripod to the bag though as Lowepro do not seem to do a slip lock tripod bag.

I am very pleased with mine.