[dallil]

Hello; this is my first participation in se foreme. I buy a k5 of a person that I do not know is that live in Italy, the serial number of the PENTAX K5 is the 4212833 .everything is going well for the moment, but when i connected K5 on the tv in hd video mode therefore live view I have noted the presence of a small black spot which is colorful and disparesse has the presnce of strong light … This stain is voi on the pictures using f22..in dark hikes…is that it is a dust or it is The problem of the filter that you talk? I have not the Qit of cleaned how do i know.. ? Thank you.

[aurele]

around f16-22 and more, you will see all the durt and the dust, that is on the lens and on the sensor.

Try to stop down your lense to f11-13 max. beyond, it will only reduce the quality of the picture.

it's no big deal, just use a blower to remove all the dust.

[Anvh]

Could be a dead pixel.