Niklas,
I'm a bit confused by your comments...

Sv works like this:
* Front dial adjusts ISO. You see this in the viewfinder
* Camera chooses appropriate Av/Tv combination for the chosen ISO
* What values it chooses initially depends on the Custom setting (Normal, High speed, Depth, MTF)
* When you adjust the rear e-dial it will simply shift the Av/Tv combination from the initially chosen values (changing Av & Tv together to keep the exposure correct)
* Pressing the Green button puts the Av & Tv combination back to the 'default' as chosen by your program line choice.

If your K20D isn't doing that - do check what happens in other modes (e.g. Tv or Av, or P mode)

Hope that helps!
Matt

Al has pretty much said it all
The 'wireless' is not radio, but light - the popup flash does the communication. The AF360 also has two modes of slave - either P-TTL compatible or "dumb". The dumb mode allows sync to basic flashguns, and under certain circumstances allows syncing to other makes of camera.

As far as dSLR bodies go, here's a quick summary (purely from memory, so there may be omissions!):
*ist-D - supported full wireless and wireless HS (high speed). Also supports older TTL guns as well as P-TTL
*ist-Ds - no wireless, but supports TTL + P-TTL
K10D, K20D, K200D, K7 - supports wireless from popup(but not HS). HS mode supported with flash on the body. Wireless HS mode supported with two flashguns (ie one on body, one or more as slaves).
Others - no wireless support with pop-up. You need two flashguns for these.


The wireless flash is handy. However, it's worth mentioning that if you are looking for 'studio-type' shots where everything is under your control, and where the conditions don't change, then you can also consider using the cheap and readily available "PC" style connectors and cables - you can also use really old, cheap flashguns too

I find I use HS mode more than wireless - HS allows fill in flash in daylight conditions. Great for kids outdoors etc!

Hope that helps!
Matt

Just Image / Adjustment / Negative (IIRC!)
Normally Ctrl-I (Cmd+I)
Matt

Simon,
All metering for P-TTL, as well as for non-flash metering, is performed through electronics housed in the top of the pentaprism. The same 16-segment meter sensor is used to evaluate the preflash as is used for normal exposure (though it appears that for flash exposure the whole frame is used, irrespective of the metering mode you select ). Consequently, anything that affects the mirror or focus screen can potentially affect exposure.

If you use the flash on "A", or "M" mode then there's no such problem
Matt

Nice results
I take it you're enjoying the lens as much as I am?
Matt

Thanks for the info yelvertoft - worth knowing
Matt

I hasten to add that it was the Metz with the Canon head though
Haven't tried my Metz (yet)... still, it's not a huge amount of money
Matt

These little YongNuo transmitter and receivers are nice. You can get deals with 1, 2, or 3 receivers.

A friend of mine bought a set of 1Tx + 3Rx. Had a quick go on the K20D + AF540, but the AF540 wouldn't sync properly above about 1/30s If I used his Canon 580EX or the Metz 50MZ5 then it was fine up to 1/180s. I hasten to add that it was a VERY quick go and there may be something confusing the AF540 - my guess was that the extra dedicated pin on the AF540 was shorting to ground on the hotshoe (a common problem alas)

That said, the units were extremely good - very compact, and easy to use.
I was very tempted to just get a set anyway

Matt

I'm a NAS fan, but found that having Gigabit isn't necessarily faster than regular 100-base-TX Have a Freecom NAS Pro drive that has GB support - but the main bottleneck is the performance of the CPU in it
If you want real speed on a NAS device then you'll have to pay real money
Matt

Actually, using anything other than sRGB when you don't understand colour management is asking for trouble
Even when you do understand it there are still surprises! (And it gets to me occasionally even after all these years and experience of CM!)
Matt