I have K20D, AF540FGZ, but I don't have a SMCP-M 50mm 1:1.7 lens.

The nearest I have is a SMCP-M 400mm 1:5.6 lens.

Settings: ISO 100, f16, 1/125th

My findings:-

P-TTL mode on flash - flash fires and discharges 100%. Note that when the shutter button is pressed halfway, the flash switches to TTL mode, which is not supported on the K20D, hence the flash fully discharges.
A mode on flash - flash fires and exposure is as expected, slightly underexposed.
M mode on flash - flash fires and exposure is as expected, slightly underexposed.

My subject is a white eagle statue on a pine backed shelf.

Result: Everything works as expected.

Try firing the flash with no lens on the camera and tell us what happens.

Seems to be limited to UK post codes. Not much use to the rest of the world. Thanks anyway.

Available here.

Apps improved, K-M support added, new lenses added.

Firstly, you can't actually touch, or damage the sensor itself. It has a glass IR filter in front of it, and in the case of the K10/20D it has a special antistatic coating.

If anything is damaged, it'll be that filter, not the sensor.

It is possible to replace them but it's not a job I would undertake.

This might be a good case for a conversion to IR where the filter is replaced with an R72 filter. The camera is rendered useless for colour work but IR photography becomes a dream as you have bright viewfinder and can use 'normal' shutter speeds.

I watched a Canon 30D with a damaged sensor/filter sell on ebay recently for over £200.

The Pentax flash system does tend to underexpose, especially if the subject itself is bright or reflective. Add a bit of compensation on the flash, or exposure compensation on the camera.

To use a shutter speed higher than 1/180th, you'll need to use high speed synch. You too can use a shutter speed of 1/4000th if you want to.

If you mean your shutter doesn't fire when you use a manual lens, you need to change the custom menu setting to permit use of aperture ring.

Hope that helps.

Could we see a return of the independent camera shop, like SRS?

Success is simple. Have a shop in an easily accessible location, employ knowledgeable unbiased staff, stock kit that people want to buy, and sell it at a competitive price.

Oh, I forgot to mention, you'll need a shed load of money to start with unless you can find a bank to borrow from

Welcome deuk-jin Choi. Maybe you'll learn some English too.

As far as I can tell, there was only ever an M and an A version of the 1:2 lens. The M version has the words Asahi opt. Co. Pentax on the bezel.

Either of these versions will fit any Pentax K mount camera, including DSLR's.

Hunting will always be an issue with any AF macro lens when used in AF. For that reason, most macro lens users prefer manual focus.

AF in macro is a hindrance, not a benefit.

Manuals for the 67 and pentaprism + meter are available from here.

Select Category = Cameras & Sub-Category = Medium format.