SRS have some nice used stock on ebay. There is a 2 week old DA* 200mm f2.8 with 12 month warranty for £629.

Never had that problem.

My screen is dirty anyway. I just move the image around the screen and if the spot moves with it I know to do something about it. Usually its just the sky I check and I always do it full 1:1 resolution

I like 2 & 4. to me they look like growths on an agar plate.

He made a couple of mistakes, the other one being the mention of the K30 & K2. He is enthuiastic about Pentax though and the K3 in particular.

Just watched the Camera Store Tv K3 Hands On again. I am going to get a K3 just a matter of when.

Just saw this link. the guy is quite enthusiastic about it.

Hi Ken

Also this link link

Regards

Jeff

Hi Ken

I found this link of someone with the same problem and how it was fixed link.

I googled 'pentax f 70-210 lens dismantling' and there is a fair bit of info available.

Regards

Jeff

Hi Ken

I had a Tamron 80-210 ad2 lens that I part dismantled to get rid of some fungus. When I reassembled it , it wouldn't focus on infinity. The front element screwed into the barrel and I had not recorded how many turns I had used to unscrew it.

I removed the three screws in the barrel that secured it, then I had to loosen a notched ring at the front of the element with cocktail sticks. I then adjusted the element by screwing it in or out until it focused on infinity. Finally put the screws screws back in and tighten everything up including the notched ring.

I am not familiar with the Pentax-F 70-210 so may don't have these screws but I would check if it has a notched ring that has become loose and allowed the front element to move.

Regards

Jeff

With less room for your lunch & waterproofs but a pocket and strap for a tripod I use this one link.

Jeff

Forgot about that

Jeff