I suppose that's possible because the contacts were designed to work a power zoon, not auto-focus. My understanding is that autofocus may not work correctly with too small an aperture, with the K-5 being less affected.

I'm not sure to what issues you are referring to on the other forum so cannot comment - do you have a link?

I've got the 1.4x version with the PZ contacts which only looses a single stop instead of two, so is less prone to lacking light to work.

John K

If I may comment, the one at http://funchal.olx.pt/kenko-teleconversor-fotografico-2x-pentax-iid-433649958 looks like it DOES have the PZ contacts so would autofocus with DA* lenses. You can see them at about the 5 o'clock position on the interior black surround, that is providing the picture is of the actual item and not a stock image in which case who knows! Maybe worth double checking it is the actual thing before purchasing it.

John K

I see. I had something similar with my GX20; got a 10-17mm fish-eye free!

John K

Cheers. For reference: http://www.dpreview.com/news/2012/10/25/Samsung-NX-12-24mm-F4-5-6-ED-45mm-F1-8-U...

Why buy the Pentax/Samsung version lens for an NX body?

John K

Is it K mount or NX mount? If the latter it won't fit Pentax or Samsung GX series.

John K

If you can, why not copy all the files to the computer or an external drive, then try and shut down the PC? If it won't shut down, just turn it off. Then retry and copy the files and reformat the card in the camera and carry on as normal. It could be you would get away with just removing the card but there is a risk.

If everything has just locked up you have no option but to turn off the PC and hope for the best, then save the images and reformat the card.

The card may not even need reformatting but would be wise to just in case.

If the card goes awry, there is software that can recover the files but doubt it would come to needing that.

John K

Well it's nearly 1st April.

Can't add one from here. No snow at all here on the Yorkshire coast.

John K

Is it a test shot from the new full frame Pentax?

John K

I suspect they'd be even brighter if it wasn't HDR'd. They look wet to me and are reflecting the sky and are pretty close to being burnt out. HDR might just have saved them.

John