And what does quadrupling the pixels do for noise? That is if it were possible. That is the case for the bigger size sensor.

This site pretty much says it all:

http://www.mdavid.com.au/photography/apscversusfullframe.shtml

When taking wildlife photographs the limiting factor is often how close you can get, the focal length of the camera and the number of pixels that you have.

To double the image size you can;

* Halve the distance that you take the picture at
* Double the focal length of the lens
* Quadruple the number of pixels the sensor has for any given size of sensor and then crop.

The depth of field does not change for a given lens, with a given aperture. However beacuse you need a shorter focal length to fill the frame, with a smaller sensor, you get a bigger depth of field unless you open the aperture up.

Pentax is certainly upping it's game. It was late coming to the digital SLR and the lens range was tiny and not of the quality or range that other manufacturers were offering. If it was not for the Pentax legacy kit that I have I probably would be using a Canon or a Nikon camera.

Now it is a different story. The camera bodies are probably better pound for pound than any of the other manufacturers and the lens range and quality is good enough to keep most enthusiasts happy.

Would a FF see the Pros switching to Pentax? Is there a big enough market? I would like to see Pentax continue to develop and excel in their range of lenses and APS-C sensor cameras

The small sensor's larger depth of field is an advantage for some things (eg Landscapes) But a disadavntage for others (eg portraits.)

I love that a 300 mm is efectively a 450mm so effectivly longer length windlife photography has become more affordable. However I'm having to result to lightroom/photoshop much more to improve portraits.

You win some you loose some

DP Review have carried out a comparison of Raw Convertors

See this page: link

I have lightroom which I rate very, very highly

(Admin note: corrected link!)

I have the DA 60-250 SDM and find the focusing speed amazing. It's so quiet that sometimes you are listening to see if anything is happening.

Why no anti-reflection coating on your glasses? You've got great camera lenses and cameras, all with expensive coatings on so why would you look through glasses without a coating. Pentax make a great range of spectacle lenses. The latest coatings are also hydrophobic and repel water making them less likely to mist up.

PS Before you ask - I don't work for Pentax or specsavers who use pentax lenses

Transitions lenses generally come in two colours, Grey & Brown. As a rule of thumb the grey ones act a little like a neurtal density filter just simply making things darker. The brown lenses do enhance contrast a little, as Horst posted in the initial comment. A bit like the yellow or orange filters used in photography especially black and white. The brown ones are often prefered by wearers as they give more warmth to the appearance of the person wearing them.

Whilst photochromic lenses have improved a lot in recent years they do rely on UV to activate them. As a result they go darkest in high UV situations. They are also temprature dependant and darken less in hot tempratures. This makes them less suitable for travelling to hot countries.

I've just ordered the AA battery adapter for my K30 from the Far East on E-bay. I bought a Trust IR remote for £1.99 this way and it is just brilliant. I don't use it enough to pay the full price for a pentax one.

I much prefer AA batteries. My Kx & *ist took them and my flash also uses AAs. One charger to take on holiday and in an emergency you can always put some standard bateries in.

I shoot DNG on my Kx and I'm just about to upgrade to a K30. Shooting RAW/DNG has saved many a photo as the Kx has always had a tendency to blow the highlights if you are not careful.

As a mater of interest lightroom updates bring in new cameras but when Adobe bring in a new version they stop upgrading the older one. This forces you to buy the latest version when you get a new camera if it is not covered by an update. This also applies to ACR for photoshop. Does shooting DNG get around this problem or is DNG camera specific?