If she wants a nice Bridge camera, SRS were advertising the Pentax X70 at a good price.

I would go the extra few bucks for the Interfit EX 200. It is a distict step upwards and not that more expensive.

The kit works very well and I use one for the occasional times I use studio flash.

Ricoh have already come up with this idea, with matched lenses and sensors that are interchangeable on a basic body.

However, on test the results were distictly average. The price was also high. The same holds true of much high end (in theory) kit - the Leica isn't anything special either.

These things have to be a whole bunch better than a £500 DSLR to have any attraction at all. At the moment they are not as good.

10-20mm sold to Oggy, as per PM.

The following items are for sale:

Samsung GX20 with Samsung 18-55mm lens. Discs, leads, accessories included. Condition is excellent in all respects, with no defects or damage. Summing up, I would happily use this for critical photography.
Price: £375.00 including insured shipping, to anywhere.

Sigma 10-20mm f4-5.6 DG EX lens including hood, caps, case. In the same splendid condition as the GX20.
Price: £225.00 including insured shipping, to anywhere.

Sorry I haven't had time to post up any pictures yet, and I'll try to do that very soon. The schedule is a bit of a problem this weekend but I thought I'd post these up anyway, just to let you know that they are here for sale.

I once read a Nikon manual for a compact bridge style camera and it said thet higher resolution was obtained when shooting at the black and white setting.

If this meant that every pixel was being processed instead of blocks of four then it's quite logical to presume this.

The demand for a black and white camera would probably be quite limited, but one that ignored the Bayer filter and processed differently when asked to might have a unique selling point.

There's no way that the image size from a given lens could change. What you have done is change the format, so the focal length required for a given angle of view has changed.

This has been known and understood since the dawn of photography:

110 Format = 24mm stabdard lens
35mm Format = 50mm
645 Format = 75mm
6x6 Format = 75 or 80mm

and so on. The same applies to digital, only confused now because we don't have standard prime lenses but standard zooms these days.

Standard zoom for full frame say 28-80mm
Standard zoom for APS-C say 18-55mm

And both these result in similar angles of view.

The sensor size doesn't matter in one way, because logically if you have an image created at 300 pixels per inch, then more pixels will mean a bigger image.

The sensor size has a different effect, in that a bigger sensor has room for more pixels of a given size. Or it could have the same number of pixels and each pixel could be physically larger, this reducing crosstalk (spillage from one pixel to an adjacent one) and noise (less amplification needed per pixel).

Fair enough, but I don't think the person who replied to you had thought it through.

What are you trying to show with this? It would appear that it just illustrates the different sensor sizes on a range of cameras and is derived from the same image taken on any camera, just resized in Photoshop. Each image is identical in framing and DOF, which is not an accurate representation of anything else.