Whichever way you look at it, it's caused by chromatic abberations. This is the same effect as a prism splitting light into various colours and represents an inability of the lens and/or the sensor to deal with all wavelengths (colours) at the same point.

Those of us who wear Zeiss Umbramatic glasses, which have two elements, can see the effect beatifully by looking obliquely at objects at the edge of our field of view.

It should be minimised by telecentric lens design, which ensures the light rays striking the sensor are as parallel as possible. It should be more obvious therefore with some lenses designed for film, and worst with rangefinder lenses, which Leica struggle with to their cost.

The second effect is spillage from one pixel to the next because of close packing and inadequate insulation between photosites. Obviously then the wrong colours can be found as pixels of an inappropriate colour designation are fired spuriously. If a blue signal leaks to a green, for example, then it won't be right. Hopefully this effect will be well controlled, but it does put a limitation on the number of pixels on a CCD.

The first culprit though will be cheaply made lenses, so, back to basics, buy the best lenses you can...

It's purple fringing for sure, caused by Chromatic (colour) abberation.

The best solution is good lenses so the problem isn't so obvious.

You can also avoid shots that exaggerate CA by careful consideration of viewpoint.

I haven't found it to be a major problem with any of my Pentax lenses, so I think of it as another thing that supports what some of you have kindly referred to as the "Riley Rule" - buy Pentax glass. It does, IMHO, make a real difference.

Yes, it is a nuisance when the photo is too big and we have to scroll from side to side to read the text!

That's life I guess.

And you can do it, no-one is saying you can't.

Personally I post my picture a day on ePHOTOzine to share images as widely as possible, and I welcome any feedback anyone cares to give.

Occasionally I will post a picture in a forum (here or elsewhere) if it makes a particular point, or maybe if I like it so much I want to spread it further.

My suggestion is do whatever you feel comfortable with.

Don't forget this is a forum, and photos are not uploaded to it, but are linked from other sites.

ePHOTOzine already does what you are suggesting, doesn't it?

The tonal quality of the green is nice, but I think you have had a problem deciding where to focus. Nowhere except a far part of one leaf is really sharp.

For these sirt od shots you need very careful focusing and a small aperture to maximise depth of field. I would have used f16 for this shot. (Not f22 as quality will drop off at f22)

It's a pity, because 200mm is an excellent choice for a Macro lens.

I use 100mm, but I can't say that the 50mm Macro has ever been anywhere near as useful.

The only exception is for copying small documents, and then the 50mm gives a more comfortable working distance.

ePHOTOzine is ideal for feedback and critiques and usually very constructive.

Posting pictures here is OK as well, but the forum is mainly a place for discussion and this is where it is especially useful and unique.

Now that the K10D is making waves and getting more pentax Users out there it's to be expected that more people will post and a wider variety of viewpoints will be found.

However, courtesy is always a good thing.

Exactly right, George.