Its great fun Andrew!

All the other Pentax DSLRs (and indeed most others) have what is called an anti-aliasing (AA) filter in front of the sensor. The K5IIs doesn't. The AA filter removes interfence patterns such as AndrewK's link shows. So if there is a fine repeating pattern that you are trying to photograph, what is being said is that the K5IIs is more likely to suffer from that patterning effect as the pattern you are photographing is 'interfered with' by the sensor pattern in the camera. The smaller the pixel size and the more of them you have the less this should be a problem. THE AA filter somehow reduces this effect by (I think- someone may need to correct me)slightly softening the image landing on the sensor.

How much this moire effect is a problem with the K5IIs and real life pictures, I don't know - I believe the jury is still out!

Hope that helps

Andy

Those are two beautiful shots you are showing in this thread - hope the exhibition goes well!

Andy

Another that has not been mentioned is the DA17-70 which is on the camera most of the time. Got it pre-price rises and with aPentax cashback offer at the time. Have taken 1000s of shots with it - and it is excellent quality, albeit the zoom 'slips' easily now through so much use!
Andy

Thanks for those Gwyn - really good laugh - both of them!
Andy

Andy

Interested anyone link

Andy

I was - sorry for not being clear! And thanks for the answer - that suddenly makes it of more interest!! (I should have read the link properly :blush

Andy

If using one of these 10 stop filters with a cokin type holder, isn't there a danger of light leakage around the sides of the filter?
Andy

Great Fun!!
Andy

Very interesting - nice video!
Andy