Joe, unless the colours are wildly wrong I wouldn't worry too much. If they are also wrong on your PC/Mac, then is the time to worry and investigate the reason.

One of the most common reasons for incorrect colours is an inappropriate white balance setting.

For instance, if you shoot indoors with tungsten lighting and the WB set to daylight, the colours will appear incorrect.

Even that is no huge problem if you shoot RAW as the WB can be corrected in post processing.

The only reason I look at my camera screen is to check the histogram info for correct exposure. In fact, most of the time I don't review my images on the camera.

When I tried adjusting my camera for my Sigma 180mm and 135-400 APO lenses, the camera used the same settings for both. When I PP images from these lenses, they are identified by Lightroom as simply 'Sigma' with no additional info.

I'm in the process of archiving all my slides and negs from years past.

My scanner is a Minolta Dimage Scan Dual IV with Vuescan software. I'm saving as compressed TIFF. Each image file size is about 30Mb and a rack of 4 slides takes around 10 minutes to scan.

My intention is to PP these in Lightroom and output them as JPG's for distribution to other family members, mainly to embarrass them .

Wireless implies that adapters and connectors are not needed and yes, the *istDS is wireless compatible with the Pentax AF360FGZ and AF540FGZ flashes.

You will need two flashes, both wireless compatible. The one on the hot shoe will be set to Master or Controller, the off camera flash set to slave.

The on-board flash of the *istDS can't be used as a master or controller for wireless operation.

You can download the *istDS manual from here. Page 155/156 will answer your questions re wireless flash on your camera.

Is it silver with lots of buttons on one side, some numbered and others different colours?

I don't know this lens but it may not have the 'A' setting on the aperture ring.

I think the auto refers to auto diaphragm, meaning, the aperture will be wide open for metering and will stop down automatically for the exposure. This will only occur when you have your camera set to M - Manual exposure mode. In any other exposure mode the image will be captured at full aperture.

You will also have to set "Allow use of aperture ring" in your custom menu.

No 4 could be a sanding disk or newsprint.

I doubt very much if the DIY approach of substituting the AA battery source with a SLA battery is going to dramatically reduce recycling times.

It'll probably be not much faster at recycling than with a set of new, fully charged Lithium AA's.

You will however get many more flashes per charge from an SLA battery.

250GBP is very cheap, possibly for good reason. The going rate for these is anywhere between 599GBP and 799GBP.

Isn't that Big Ben just to the right of middle?

Great shot(s), well done.

Clouds on the left could use some work.