I have the black version of the 80-320mm and it's been no worse or better than any other similar telephoto zoom in terms of focusing. I have never used the silver version so can't compare the two.

When you Save For Web the image is saved where you allocate it. When you close the image that is lft on screen, don't forget that this is the original so when prompted to save changes or not, always say no.

Otherwise you will replace and lose your original.

I have and use both lenses and don't have any issues with either of them. The extra 20mm can be useful, but the lack of the ability to manually yeak the AF is not.

1024 is too wide for this forum - that's why sometimes we need to scroll from side to side. 800 pixels is the recommended size.

Look for SRB on the web - they make every kind of adapter you could wish for and they may well know the thread size of your filter.

Of course you can use your screw thread lenses on the K200D, if you obtain a Pentax Adapter K.

The shutter of the Spotmatic F may well be running slow, which would cause over-exposure. It could be fixed by an overhaul. I presume you've fitted a new battery?

As a temporary measure, reset the ASA value higher than the actual film speed. Try 400 ASA for a 200 ASA (ISO) film and that may well be enough to correct the under-exposure.

I know what you mean about the joy of handling these older models. They are items of beauty...

Are you taking photos indoors under artificial light? This would result in very red images. There is a "tungsten" setting in the White Balance menu that will correct this, but don't forget to switch it back to AWB for outdoor shots.

Then it may have the T2 mount. If it has, you have a solution to the problem that will be very low cost. A Pentax K T2 mount is no more than a few pounds cost.

If it's a T2 mount then remove the Canon mount and replace it with a Pentax one. Either someone here will offer one, or try eBay, or buy new from SRB, the people who make every adapter known to Man.

Which mirror lens is it exactly?

The instruction book, followed by an expanded one in book form, plus any of the hundreds of beginner's photography books.

I really would suggest a good book perhaps from Amazon, plus magazines and working through the tutorials on the provided DVDs/CDs.