LINK

Instructions to do 16-50mm at beginning of that thread

I think it can be done on any Pentax body pre K-3 depending on firmware installed.

You are a braver man than I to say such a thing out loud.

And me ... showing a bit of attitude there

Can you not find a cheap K10D or similar on Ebay, do the hack and then re sell it?

Edit: I see on your sig you have a K200D, can't you do the hack with that?

Because Sigma back engineered the PKA mount they gave quite a few lenses the same code which can be a right pain at times, especially if you need to do any lens focus adjustment in camera.

If you use Windows try right clicking on the edited Jpeg (if you shoot RAW) and go into details, scroll down to advanced photo and enter Sigma 50-150mm DG EX HSM OS in lens manufacturer. That should then show correctly on Flickr. You can do loads at once by using Ctrl + left to highlight click and the just altering one file.

I have the Teleplus 1.5x PZ and it is next to useless with my Sigma 85mm HSM, 24-70mm HSM and 70-200mm HSM OS. It will work but is very hit and miss when trying to lock on. You did very well to get it for £50 though

Possibly so although there does seem a fair amount of decent airshow pictures taken with the 150-500mm. Maybe (just like most things with Pentax) it needs a lot of practice.

I remember Alan (Blythman) doing one a couple of years ago and they were excellent.

There is a massive thread comparing both lenses on the other forum LINK

Worth a read I would say.

Also do a search on Flickr 150-500mm airshow

Sigma 50-500mm HSM OS on a K-5IIs ... same internal focus motor as the 150-500mm OS HSM. I should imagine the K-3II could drive the HSM a little faster but I sold the Sigma before I got my K-3II

Saying that I never actually tried the 150-500mm so maybe they limited the af speed somehow.


Belgian Air Force F-16 Yeovilton 2013 by Mike.Pursey, on Flickr


Eurofighter Typhoon - Bournemouth Air Festival Show 2013 by Mike.Pursey, on Flickr


Red Arrows - Bournemouth AIr Festival 2012 by Mike.Pursey, on Flickr


Breitling WingWalkers by Mike.Pursey, on Flickr

If the 150-500mm you are looking at is a decent price then why not buy it to try, they are easy to move on if the price is right.