Hmm, well I must say that was quite a good natured exchange on the whole, so I think it does demonstrate perfectly well that the forum community here is a friendly one!

It's quite clear that there are different points of view and that they can all be put forward!

As a bit of dust on the mirror has no effect on the images it's best to leave well alone. As you say, the mirror mechanism is very delicate. Any misalignment will cause problems.

So just forget the dust and look perhaps to some more lenses, or maybe upgrading to the K20D, both of which are worthwhile pursuits.

If you don't maintain the half press then the AF will kick in again.

Look in the threads under Competitions and you will see a Sticky desribing how to post images here. Please don't confuse the Competitions Gallery with unrelated images.

Somebody asked this some time ago and now I've forgotten again what digiscoping is....my nearest guess would be using a digital camera on a spotting scope or telescope.

Am I close?

Which just goes to show how different people use cameras differently. If I want to tweak the AF position provided half pressure is kept on the shutter release then the lens can be manually focused and the shutter released.

So you AF using ths shutter release, it locks into position and then you adjust as you wish by using the MF ring.

Don't forget the Elicar, which also has a good reputation.

Like many of the others though, it is huge compared to the Pentax lenses.

Caveat duly noted Daniel!

Some years ago I asked the then Sales Manager how accurate the AF of the Z1-P was. What I wanted to know was would it focus on say the eyes in a portrait and not just some ill-defined area around the face. He couldn't answer the question.

Now we are expecting an f1.4 lens to focus absolutely spot on down to the mm and I suspect it may not have been designed to have that close a tolerance. Most people use a 50mm f1.4 at greater distances than we are talking about with a test target, and rarely at f1.4.

It would be nice to get some alternative measurements from different lenses to confirm it, but we might be chasing the crock of gold at the end of the rainbow with this one.

I've had a look at the listing and it seems you could lose a lot of money on these purchases, which does seem a dreadful waste. At least the £100 cashback will reduce the blow, when it arrives.

Have you thought of selling the items separately to see if overall you get a better result?

Yes, you're getting it right!