The subject of Angle Finders has come up a couple of times and I happened to come across this ebay shop:
http://stores.ebay.co.uk/VirtualVillage_W0QQssPageNameZVIStoreHeaderLinksQQtZkm?
The finder is described as C***n/N***n but in fact includes an adapter for M series finders. Made by Seagul & shipped from China - I don't know what the quality is like but it is a lot cheaper than the Pentax option.

Anybody know anything about it?

Just for info - the MZ6 also support wireless flash with one AF360FGZ

Experience suggests that if you use the aperture ring then the aperture set is correct at the widest angle but 'closes down' by a stop or so when zoomed to maximum (so with the ring set to 11 on the 28-105 the actual aperture is 16 at 105). Of course if you are using open aperture TTL metering there will not be a problem since as the max aperture varies by the same amount as the set aperture through the zoom range then the metering will be correct.

Is a stop a significant issue for exposure? I would say so - so if metering externally for (e.g.) the 28-105 it might well be an idea to compensate by 1/2 a stop to 1 stop depending on the zoom setting.

I'm with John on this one. In fact with my FA 28-105 3.2-4.5 if I set it to F11 on the aperture ring and zoom on my MZ6 the LCD readout of aperture changes with focal length from 11 (at 28mmm) to 13 and then 16 (at 105mm) - so the camera 'knows' about the relative aperture variation.

Of course FAJ and DA lenses are constant aperture as they have no aperture ringand the aperture has to be set from the body. Some do have a variable maximum aperture of course.

The actual aperture of a lens is the aparent size of the the 'hole' as you look into the front of the lens. The maximum that can be, of course is the diameter of the front element - which is usually the case for telephoto lenses. Wide angle lenses, hwever tend to have a smaller aperture than the diameter of the front element for optica reasons.

The relative aperture (or f number) of the lens is the aperture divided by its focal length.

Zoom lenses are mostly variable aperture. If you look into the front of a zoom lens the apparent size of the hole changes as you zoom (due to optical effects), but usually not as much as the focal length changes and so the relative aperture (f number) changes with focal length. AFAIK most variable aperture zooms are nomally variable at all apertures, not just maximum.

Constant aperture zooms compensate by mechanically linking the iris to the zoom action - effectively reducing the maximum aperture for shorter focal lenghths. This makes them more complex and usually more expensive but easier to use with external metering.

Of course if you adjust the aperture from the body (rather than the aperture ring) the electronics compensates and keeps the relative aperture constant as you zoom.

For the record the 170-500 is internal focus also.

If we are taking manual then I would probably go fo my MX and the 35 F2 and 85 F2. That gives good scope for landscape type pictures and portraits. I had a holiday in Indonesia once with a similar kit (actually LX and 35 2.8 plus Tamron macro 90 2.8 ) and found it very versatile. I was staying in Singapore and also had my MZ6 with (at the time) the Tamron 24-135 (nice lens but rather bulky) and other lenses. I knew I was going into slightly dodgy territory so I decided to leave the flash looking camera behind and go with more well used looking kit.

AF it would be my MZ6 with the 28-105 (not quite the range of the 24-135, which I no longer have, but much much lighter!)

Once when I was traveling really light I left all my SLR kit behind and carried just an Olympus XA. Five weeks, eight rolls of Sensia 100 (I was being careful with film as well) and some wonerful pics - see
www.dabnet.org/camino

The Preflash of the P-TTL of the on camera flash is triggering the xtraflash before the shutter opens. Unfortunately I don't think you can turn the P-TTL off when using the built-in flash.

Yes

(very short answer but I can't think of anything to add!)

There are two different forms of TTL command protocol for Pentax Cameras. The Manual focus bodies (LX, Super A) use an analogue comand protocol. The AF cameras use a digital protocol, but can also use the analogue protocol.

Flashes designed for the manual bodies (without an F after the number) use the analogue protocol (e.g. AF280T, AF400T) offer TTL on all TTL bodies (including 645 and the 67II). Digital flashes do not have an analogue command mode (such as the AF400FTZ) will only offer TTL on AF bodies (including the AF 645. Not sure about the 67II but I suspect it has the digital protocol)

This makes the AF280T quite a useful acquisition and at c. £50 secondhand quite a bargain. And unlike the otherwise excellent AF360FGZ it has a swivel head.