To be fair, it may well also depend on what OS is in use and how well updated that is.

I think it would be better to uninstall both and then just re-install either AVG or Avast.

There's a practical limit to what we can do without in-depth computer skills.

Gordon says it's all sorted out, so that's all right then.

Getting white balance right is fine if you want "correct" colours, but creative photography doesn't always need such neutrality. Some very dramatic images do not have accurate white balance.

The only point I'm making is although it's necessary to understand how to achieve a correct result, we shouldn't let it be a straightjacket. Don't be afraid to think outside the box.

Best to ask them to, just to make sure.

I was hoping taking the direct payment option would be quicker, but I guess we'll find out.

That's the one.

I presume you mean the 16-50mm, otherwise this forum will soon be full of very excited people!

There sis a manual "SMC Pentax-DA Interchangeable Lens Operating Manual" that is included with some of the lenses. The version I have here is published by Hoya Corporation and is publication # H17-200806. It covers all the current lenses with specific comments on individual ones as necessary.

It's the only copy I've got, but I can make a copy of it if you would like one.

It's an essential difference that is often confused, sometimes even in the photographic press.

The image is made up of pixels and one of its properties is how many pixels per inch that it is made up of. 72ppi is fine for monitor display. 300ppi for an image that is to be printed.

Printers lay down dots of ink and how many they deliver per inch is represented as dots per inch. Let's take our 300 pixels per inch image. If we printed it at 300 dots per inch, that would be one dot of ink per pixel, not a recipe for a great print.

So we need as many dots as possible to make up each pixel and I always use the maximum, 2880dpi in the case of my printer.

It's not really very helpful to confuse the two things as it doesn't help us to understand what is going on.

So how many ppi does an image need to be best quality to the eye? It depends on viewing distance and print size and the Image>Image Size box will show you how they inter-relate. Basically a 72ppi image would look sharp, but only if viewed from an immense distance. If that was a poster 100 feet away that might be fine. For normal viewing the eye can see the difference up to about 300ppi, anything more is pretty much a waste and certaily I've never met anyone who can tell the difference between a 300 and 600ppi image.

Go the other way and a 150ppi image is clearly worse than a 300ppi one.

It has been discussed many times. There are quite a few people who have had problems or are unhappy with the Sigma but the Pentax has more or less universal approval.

The Pentax 12-24mm is an excellent lens, very sharp, nice image quality and almost distortion free.