All you need to do is resave the original using "Save As" and put it in a different folder.

The original stays, as mpjx says, untouched for future use.

Basically any A series or later Pentax body will enable use of program and shutter priority modes. The later MZ series cameras may be a better bet though, and of these the MZ-6 actually introduces aperture control by the camera body.

So I suggest the MZ-6. However, bear in mind that DA lenses may have a reduced image circle, so may give vignetting on full frame film bodies. Still worth a try, and some lenses will be better than others.

I vote for The Missing Manual, an excellent book.

Unfortunately the image size isn't sufficent for this to really work well, but what I'd be inclined to do with the first one is something like this:
[IMG]http://i240.photobucket.com/albums/ff250/johnriley1uk/044-Oggy-1.jpg[/IMG]
I might even go closer, but it doesn't leave anything recognisable at these file sizes!

We print at home, but regardless of that I would always resize to the print size required. Then I can apply the exact amount of sharpening that I want and be sure the result will be what I am aiming for.

Mike Maloney was in AP, sending people that dreadful "I've been mauled by Maloney" badge for far too long!

The writers I had far more time for were people like Kevin MacDonnell and, much later, Jack Schofield and David Kirkpatrick.

Yes, R mount. It does look a good lens, and if we knew the price we would probably think so it should be!

There's more to lens quality that these bald figures of course, but nonetheless I think they are interesting and at least give us some information.

It's not giving free advertising to a brand any more than carrying a camera with Pentax on the front is. Look at it as showing you are part of a club and a community and making yourself identifyable to other club members?

Another slice of 1982 lens life....

Decentering - Lens name - MTF 10 lpm - MTF 40 lpm - Distortion

5% Canon f4 91% 59% Zero
6% Pentax-M f4 91% 50% Zero
14% Micro-Nikkor f4 90% 48% -0.2%
4% Rokkor f4 90% 46% Zero
10% Macro-Elmar f4 94% 62% Zero
8% Tamron SP f2.5 93% 53% +0.7%
10% Panagor f2.8 92% 52% -0.1%

- distortion is barrel and + distortion is pincushion.

Again, the Pentax lens can hold its head high. In reality, all these macro lenses will give excellent results, as we would expect.

Why would we put a lapel badge on a camera bag?

To make up for Martin, I'll buy two then.