With the amount of people owning old lenses on here, I was wondering if anyone has any lenses with seized aperture rings or stiff focusing that they never use and want to find a new home for? Although I'm now using a Sony camera for IR (I would have converted a K-01 if it took an EVF), I find Pentax prime lenses generally work very well with an adaptor. My 15mm Ltd is used more for IR than anything else.

Infinity focus in IR is quite difficult to get right all the time with aerial photography, as I generally don't have the time to fiddle about getting it spot on. Focus peaking doesn't work at altitude unless there's ridges or other strong lines in the image, which has been a bit of a disappointment. I also want to try photographing thunderstorms at night in IR, when I can't see anything to focus on. So, to get to the point, I'd like to find a few old lenses that I can glue at infinity focus for my IR camera. I'm interested in any prime lens between 24mm- 135mm. I just can't bring myself to squirt super-glue on an otherwise good lens, even though I have a couple I got relatively cheaply that I've thought about using. In fact I actually had the glue out one day and the poor lens screamed NO! at me, so I put it back in the cupboard.

I'm happy to pay for any damaged lenses, though obviously not very much, and the lenses would get a new, albeit unusual, lease of life. I'm only interested in lenses that are not damaged (ie optically OK) apart from either a seized aperture ring or stiff focusing, although the general cosmetic appearance does not matter at all. Any offers?

The SMC Pentax-A 50mm F1.4 is a fantastic lens for IR, which in fact is what I use it for most. I nowadays use it on a converted Sony Nex 5N, but here's a couple taken on a Pentax.
The blurriness at the bottom of the first one is due to the window it was taken through and not the lens.

Nice stuff, Smeggy!

This is my favourite, it would make it theft proof!

I like how it says "Only" £5999.00 on the SRS ad....

Amazing detail! Something's gone wrong with the sky near that cathedral and aerial on top of the hill, looks like cloning gone wrong...probably take days to fix it!

Just had to look at a thread that shows as "Replacing anti-leg rot"on the front.page.......

Great stuff!

Thanks very much for the comments! I was very pleased how this shot came out, as it's a 2.5 secs handheld exposure, the lightning acting like a flashgun to freeze motion. I only have two other storm at night shots so far that came out without blur. Next monsoon I am going to try it in infrared. Still wondering whether a Lightning Trigger is worth investing in.......

Thanks for your comments! It's the fact that they initially told me it had made the top ten then said it hadn't that annoyed me. If they'd just got it right first time and told me it was in the top 50 I would have been more than happy with that. A contact of mine on G+ in the same situation posted that she'd been shortlisted only to be later told the same as me, that her image had been Commended and they'd sent the wrong email. Bit of a shambles for a major competition.