I am, very. One worry I had was that against the horrible white background, purple fringing would be apparent. But there's virtually none in any of the pictures from yesterday.

And for a £220 lens, I can't complain about the sharpness. Here's a crop (about 1/9 of the area of the frame) from a flypast from the Battle of Britain Memorial Flight (BBMF):

[IMG]http://i162.photobucket.com/albums/t244/chris5gd/Aviation/Farnborough%202008/IMGP0282-cr.jpg[/IMG]

And this is the 100% crop from which it was reduced. Admittedly not out at the long end, but even so.

I quite liked the composition, but the smoke trail is, sadly, heavily overexposed. I've poked about at it a bit, but I don't think it's really recoverable. Thanks again

Thank you so much for your kind words.

I thought you might be interested in the series from which that first one is taken. The light yesterday was not the easiest - most of the day, there was an awful lot of bright white cloud, which meant that avoiding silhouettes was almost impossible most of the time. There were a few blue patches, and towards the end when the Reds were flying, there was some thick (hence dark grey) cumulus, but with the sun shining through gaps out to the west.

Anyway, I've put that particular run in, in this Picasa album. The shots are spaced about two seconds apart, and you can see how the light changes from one side of the sky to the other. I did get quite excited as I saw them turn in towards me; even in the viewfinder I could see there was a chance of something decent.

I don't use continuous shooting mode - although yesterday, AF-C and pattern-based (rather than spot) AF-point selection did work quite well.

I expect they're 'ruff'.

Thanks!

Looks like I might have made a tactical error in not saving the best till last.

One more before bed. If you've seen this thing displayed, you'll know it is an amazing aircraft. Very agile for its size, which you don't quite believe until it comes past you.

[IMG]http://i162.photobucket.com/albums/t244/chris5gd/Aviation/Farnborough%202008/IMGP0146.jpg[/IMG]

[IMG]http://i162.photobucket.com/albums/t244/chris5gd/Aviation/Farnborough%202008/IMGP0575.jpg[/IMG]

[IMG]http://i162.photobucket.com/albums/t244/chris5gd/Aviation/Farnborough%202008/IMGP0627.jpg[/IMG]

I'll add a few more to this thread as I get time.

Most taken with the DA 55-300, which I'm quite pleased with.

It's not different now - I get the same results you do.

Always willing to prefer that it's just my finger trouble (since it's most easily fixed), I'd give them the benefit of the doubt if it was just Javam's thread - since I did initially think it was an airshow thread, not a 10-20 thread, so I might have missed it.

But then I deliberately picked words that had come up recently - and it definitely didn't find the chateau thread.

Strange. But if it's working now, then good.

I have done, re the search function. If I get a reply that isn't also posted, I'll report back here.

Found it!!!!!

It was this thread.

The poster was javam, who, as I now recall, posted some pictures taken with the Sigma 10-20.

I had a look at his website, which had some airshow photos - and I asked him about them.

My Google search was: "airshow siteentaxuser.co.uk"

Took me all of about 1 minute to find it.

Google: 1, Forum: pants

Ok, I hereby proclaim the forum search function to be garbage, until I see evidence to the contrary.

How many threads are there with 'Frontenac' in, or 'chateau'?

At least one, right?

Well the search doesn't find it with either of those keywords.

Perhaps the good people from the dev team could let us know how it's supposed to work, and whether they think it does or not.

But at the moment, it's looking to me like another one of those things that are left to the users in the live environment to test.

Amusingly, or perhaps not, Google can find the 'frontenac chateau' thread with no trouble at all.

I'll see if I can find the thread I'm looking for with Google - watch this space.