Peter's idea of the airing cupboard works well, but its improved if you put it in an air tight box/bag with some raw rice. Rice is quite good at absorbing water, though silica gel is better if you have some.

When just photographing the moon, spot metering has always worked OK for me. In my opinion the moon should be a mid grey, thats roughly the colour of moon rock. Any of the other modes get confused by the sky, which is usually black. The relative proportion of (black) sky & (bright) moon varying hugely with focal length & moon phase.
Aperture makes little difference, if the lens is properly focused, ISO (as always) is best kept reasonally low to prevent noise, but if working at high magnifications short shutter times become important. On several occations I've had the moon leave the field of view in well under a minute. To prevent motion blur through my scope speeds sometimes have to be faster than 1/1000s, though setting the motor drive up right would probably improve things.

Things get more difficult if you want both the moon & foreground detail. HDR techniques, or careful foreground lighting will be required to get both exposed reasonbly. Aperture also becomes much more critical, unless you just cheat with photoshop.

The majority of Adaptall-2 adapters for pentax are PK mounts - only giving M type functionality. Changing the adapter to the more expensive/rare PKA version enables the extra functions. I suspect most of the ads you refer to include the PK mount, but as they can be changed to PKA mount (or numerous other mounts) they have more function than a fixed PK.

Ive never met a teleconverter with zero length. They all incorporate a degree of extension. I'd guess that explains how the close focus remains constant.

Looking under 'cameras & lenses', rather than just 'digital cameras' does expand the selection - not a huge range but at least it has 22 items. Certainly better than our local Jessops at any time in the last 5 years!

There has been no increase in benzene content of petrol for unleaded. In fact most modern petrols will have significantly less benzene than routinely used in the 70's & 80's.
I think EN228 the European specification for unleaded petrol now allows up to 1%, but none of the racing fuels we make contain more than 0.1% I'm not so sure about our calibration fuels as many are specifically designed for testing engines that may end up using poor quality third world fuels...

BTW I agree with frogherder on all his points - Benzene is colourless, and the bike looks so much better than the cars!

Whilst true for many lenses, not all lenses change focal length. Some of mine, especially older primes, simply increase lens-sensor distance and have no way of altering the relative spacing of elements without taking them apart.

A few other potential macro subjects to add to the growing list:

Water drops (both as lenses & splashes)
Toy figures/models
wood/stone textures etc.

Holograms can be interesting too, especially with off camera flash as the result varies drastically with the direction of lighting. Those from Euro banknotes work very well but be warned there are all sorts of regulations regarding reproducing banknotes. - IIRC euro ones can have small portions photographed, but you can't display the results on-line except at VERY low resolution. Photographing British banknotes requires permission from the Bank of England.

In the right frame of mind you can find macro oportunities everywhere!

Not much related to the watch in question there Smeggy. Adding Q10 to the search helps. According to link it's a Japan only promotional freebee.

Rats, my old Zenit doesn't have a charger.
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