This sounds just like me (short-sighted/astigmatism) and for most things I found that I was better off with "aviator style" frames. Lately I have changed to a smaller frame - but still thin metal. I think that you need to talk to your optician (and don't take any rubbish replies).
The optical centre of the lens should be positioned exactly in front of the centre of your pupil, when you are looking at infinity and straight ahead. The distance between the two pupils is called the "inter-pupilliary distance", BTW, and averages 63mm +/- a few. if you have a strong correction - and hence a highly curved lens, the standard Pentax eye-cup should not bear on the frame when you look straight through the centre of the lens into the viewfinder. You may not be able to see both sides of the view at once, because the eye is a touch further away, but that is something all spectacle wearers learn to compensate for (often without being aware that they are so doing).
If the rubber eye-cup IS touching the frame somewhere - and throwing the system off-centre, or at an angle - then you may not have the most appropriate frames for your visual condition. The easy cure for this is to get a pair of frames that are big, thin, and don't get in the way, and keep them for photography. You are not looking for high fashion here, just cheap. If you normally wear bi-focals, get single-vision lenses corrected for distance - and go to the cheapest high-street source.
Geoff

No-one has asked the big question, so I will:
Chaude - are you long or short sighted?

If long sighted:
- If you came from digital compacts to DLSRs, you used auto-focus and held the camera and hence the screen at arms length. Then you had no problem seeing the shot.
- If you came from Rangefinders or SLRs, then I would ask how you managed to focus?

If short sighted:
- The human eye/nervous system will try to bring the viewfinder up into line with your axis of vision for the preferred eye. The frame should never get in the way. The diopter adjustment should then get everything sharp.

NB - there are conditions where only one side of the normal field of view is functioning - this could (if coupled with another condition) lead to a "mechanical problem" where the camera body now contacts the frame of the glasses. This could increase the distance between eye and viewfinder lens, make diopter adjustment harder (or out of range) and affect the obtained field-of-view.

More data needed ... ...

Geoff

Reading the back postings in the local groups would suggest that the Pentaxians in the area along the Kennet and Avon Canal have never had a get-together. Chris Inkpen and I have been discussing this by e-mail, and think this should be rectified.
This is aimed at Pentax User Group members in the area roughly centered on the K&A Canal between Bath and West Berkshire, and spread out a few miles either side. We are referring to the K&A, because while we both live in West Wiltshire, this would imply a small area, and we do not want that.
So, will any interested parties please get in touch, and tell us what sort of meet would be preferred. At the moment, we are thinking of a Saturday, somewhere with some good subjects for the lenses, with facilities for coffee (and things which might distract spouses and partners)and probably in West Wilts. We would also like an opinion on how much time should be devoted to general chat, and how much should be for making pictures; also, how often such events should take place. What we do NOT want to do is to set up just another camera club.
Let us know (PM or here), please, if there will be enough support for this.
Geoff

And in the early '60s, a REME recovery team on the way back from Kiel got "lost" in Hamburg. They ended up in the Reeperbahn, and had to wait right through the night, until mid-morning, for the civilian police to get them out. Opinions were sharply divided as to whether the getting lost was accidental or intentional . Of course, none of them had a camera!
Geoff

PM Sent.
Geoff

Gosh, this thread has rambled around a bit ...
Back to netbooks. There are a few things that you can do with them. If you can get a connection, you can use them to do your on-line check-in from your hotel room. Of course, it may cost more than walking down to the hotel "Business Center", but hey, this is modern technology. Then, you can preview the photos, and trash all the out-of-focus, badly composed, blurred, etc, ones - only taking the good stuff home. You can check your email if you have the right ISP.
Editing photos - no way. Well, maybe if (say) you can edit 30x30 pixel icons from scratch, but for most people - no way. I have an IBM T40 (14.5 inch screen, and that is too small for editing for me - except maybe for simple stuff like an overall change in brightness/contrast. I would not want to try it on my Apple TiBook with a 17 inch screen. I do have PSE 4 on it, but still only find it good for viewing and trashing.
There are a lot of things that it is fun to try for technical reasons (AKA "Been there - Done that") but you don't do it for serious. You can take a shot with a 2x converter on the back of an 800mm mirror lens, but how many of us would do it if there was another option?
Geoff

We have one shop left in West Wiltshire - and it sells Pentax!
It is the only one - I would need more than the fingers of one hand to count those that have closed (including three that I have bought kit from in the past).
Bath still has a couple, ditto Bristol, ditto South Wales. So then you look at their prices, and the Internet prices, and when the saving gets to be into two figures (sometimes into three figures), not counting the cost-per-mile to get there, and you can tell the future quite easily.
But then, you could put this down to the rise of Digital Photography. I had a film (yes, a real film) processed a week ago, and I was the only person at the counter. Even the bank of "print your own" machines were empty. Cheap cameras, cheap printers, cheap inks, cheap paper, all these add up to a big drop in the steady bread-and-butter trade.
It's called Progress
Geoff

Looking at the images, if it were mine, I would keep it just the way it is.
Now the memory kicks in. In my M42 kit I have an APS-Teleplus X2-X3 converter. Two halves, screw them together and the optical core moves against a spring, take apart and the optical bit can be removed, leaving a two-piece auto extension tube. Then memory gave another kick - have not used this for something like 15 years.
Geoff

Having acquired a K-A Adaptall-2 adapter, I started playing around with my A-2 28mm, f2.5 lens. Of course, the focusing direction is opposite to Pentax. This was never a big problem hung on a film camera, but stuck on the front of my K200 it is a bit more inconvenient.
A rummage through the box of odds and ends revealed a Nikon W-62 lenshood. This is a clamp-on-the-outside type and just fits the Tamron a treat. Now, instead of gripping the focus ring between thumb and forefinger, the adjustment can be made by using the clamp screw as a (very short) lever. Changing the mode of operation means that the "reverse direction" no longer feels wrong (cognitive psychology strikes again).
For me, the combination feels well balanced.
I imagine that there must be other combinations of lens and clamp-on hood that would fit together as well, and give a short "focussing lever".

Why should it be cheating?
Av means that you concentrate on composition and depth of focus.
Program mode means that you concentrate on composition only, so that could be argued to be nearer cheating.
If Av is cheating, then so is "match needle", "match LEDs" or "centre needle" exposure control (picks up SP, and puts it down again ).
Fifty years back, I used a little rotary calculator (still have it, somewhere) to determine exposure settings. Was that cheating?
Geoff