You can use the Sigma 1.4x on many lenses. However, it has a protruding element and you have to be very careful to check that the lens you want to use it with has a recessed rear element. The Bigma doesn't, which is the main reason that that lens has a limiter switch. If you want to use the TC with that lens you must put it beyond the limiter first, engage the limiter and only then mount it to the TC.

It works fine on the 180mm as that has a well recessed rear element.

The Sigma TC's don't have the PZ couplings, so SDM will not work through them. It does have the normal screw focus coupling.

I also have a Kenko 1.5x TC which works with just about any lens, but you have to be careful to get the slightly older one that has the PZ coupling, the newer ones don't, if you want SDM.

Pentax stuck a converter on their road map in January but more nothing has been heard about it

IMX, though, putting any TC on the bigma was a disappointment, especially with the lens at 500mm as you struggle with light and stability. Sticking a TC on the 180mm macro does work surprisingly well as the lens is so sharp you don't lose much in IQ. It does make the setup just that little more cumbersome (and heavy), though.

I agree with Unlocker. The job of moderating a forum is down to the moderators. If it becomes too big for those available, invite worthy members to be moderators to help. I too don't see the point of penalising everyone by withdrawing a feature that's finally been put back just because of a few who may abuse it.

As I've said, I tried that and it was ignored, so I gave up trying.

You're also selectively commenting on my posts which removes the context of them and doesn't address the fundamental problems with this application. I certainly don't blame the application, I blame the idiot whose idea it was to implement it.

I get updates, they're just not reliable (which they need to be), which means I miss updates on threads. I should always get an update after I leave the forum and this sometimes doesn't happen with this application. I also miss posts because of the broken date sorting and the 90's retro CSS look such that posts and threads are not delineated and merge into a single blob of text.

...or want to modify/update links or add additional information. It's just common courtesy on online forums to be able to edit your own posts.

The date sorting bugs are also really really annoying - which I've reported. which haven't been fixed.

I've also pointed out some legal requirements on their new site - which, as usual, have been ignored.

I've brought this up with them and they have ignored it
Then you're lucky if you don't suffer from dyslexia.

I notice email notifications are still broken. Didn't get one for any of these updates.

No, I just have problems with typing

I'm afraid your solution of 20 minutes to edit a post simply isn't workable to me. I'm not complaining for fun you know. I'm angry and upset that they have ruined a perfectly good resource - fixing what you have broken and giving back things you have taken away is NOT progress. It's dictatorial, disrespectful and simple arrogance, and shows the disregard that this company shows for the users of the forum.

It's still almost impossible to navigate these forums with the broken date sorting, the lack of detail, the horrible format and the archaic features.

You'll be relieved to know that I'll go back to the other forums now. I had come back in the hope that things had been fixed, which they haven't.

Sorry, I completely disagree. Why should you congratulate someone for fixing something that they broke? I still won't post for the reasons I mentioned.

If they need to know what is missing and not working all they have to do is go to http://www.vbulletin.com and implement it. It's simple trivial and would take minutes to integrate (or add all the features it has - you know re-invent the wheel).

As it is, it's simply not reasonable to expect people to post without being able to edit their posts - and that's just one thing that is still broken.

That's why I'm hardly here anymore. I didn't know a new competition had started. I didn't know who had one the last one. The competition is now completely separate from the forum, so I can only assume that they wanted it this way - i.e. it's not for us.

I've terminated my PU magazine subscription at my disgust with what they've done here. I cannot say how much of a relief it is to navigate away from here to a real forum where navigation and use is such a breeze compared to this 10 year old solution.

The fact that you cannot edit your posts anymore (this is almost the only forum in 20 years of using the internet that I've seen this draconian restriction used - and I have practically never seen it abused, even as a moderator of many volatile forums) means that I'm now unwilling to participate in discussions here and will now never post any photos to this site again.

The fact they still haven't fixed the numerous bugs or added needed features seems to indicate that this is it

You're still not allowed to charge the purchaser the PayPal fees. If you want to do that you have to incorporate it into the price.