Not from Pentax but from Canon.
The system is slightly different but the mechanics behind it are the same it seems.
Instead of lens group use sensor

“The IS mechanism operates by correcting shake. When there is no shake, or when the level of shake is below the threshold of the system’s detection capability, use of the IS feature may actually *add* unwanted blur to the photograph, therefore you should shut it off in this situation. Remember that the IS lens group is normally locked into place. When the IS function is active, the IS lens group is unlocked so it can be moved by the electromagnetic coil surrounding the elements. When there’s not enough motion for the IS system to detect, the result can sometimes be a sort of electronic ‘feedback loop,’ somewhat analogous to the ringing noise of an audio feedback loop we’re all familiar with. As a result, the IS lens group might move while the lens is on a tripod, unless the IS function is switched off and the IS lens group is locked into place.”


So it's maybe a feedback loop, sounds plausible.

Yeah

Till 5 December you can submit and voting will be from 6 to 12 December


btw i was thinking of doing a special comp in january one where you submit the best photo of 2010.
Dont know if others find that a good idea.

If you can't get close then 50mm is wide enough unless you want to get the whole stage in the shot.


here is another photo.
What do you think colour(ish) or B&W?
[IMG]http://i282.photobucket.com/albums/kk244/Anvh/Gare%20Du%20Nord/_IGP0122.jpg[/IMG]
[IMG]http://i282.photobucket.com/albums/kk244/Anvh/Gare%20Du%20Nord/_IGP0122BW.jpg[/IMG]

I also leave it on but if you work with longer focal lengths things get so sensitive.

Would be interesting to see some samples with 300mm with 1.7 TC or with a 500 or 600 mm.

It depends on how you used it.

With most shots I use lightroom as an input device to get a good starting point for a photo when i work with them in Photoshop.

With snapshots for the family I often use lightroom also as final device to get the photo completely ready.

For tips and tricks this a good site http://lightroomkillertips.com/

Just to make things clear.
What i meant is deliberately do some thing while you shoot with the understanding and purpose to get a better final image once you've processed it.
That's really something else then correct a mistake you make.

what do you do with your photos, make them and throw them away?

I don't edit them all some get throw away right away and some are kept stored without processing.
Like said i try to batch process most of them so even not the good ones get an edit if there is a good one which have the same lighting condition.

Lightroom does all the organizing and RAW processing, it does work really fast and easy.
I spend more time editing the best shots in photoshop for output.

If we didn't had computers I would probably spend most of my time in the darkroom, it's just another side of photography really.

Smeggy read the luminous-landscape article

The sensor is a linear device half of the information is gathered in the first (highest) stop/range of the sensor.
Every stop you go down you half the amount of information.
At least if we keep that line.
It does not go down by stops though and isn't perfect linear but at least it explains it easier.

When you've a higher dynamic range that means the first stop is much higher and so when you finally get to the darker parts you might not have so much sensor information left.
So the higher the dynamic range of the sensor the further you need to expose to the right in order to get the most in information.
That's also said in Cambridge in colour.


There is no need to believe you can test it yourself.

Take a white paper photograph it normally (it becomes grey), and then under and over expose it with 1 or 2 stops.
Correct the exposures so that they look at the normal exposed shot and compare them.

The SR in the pentax is an oscillating type and from my understanding it creates inertia by oscillating the sensor.
Since the SR actually cause movement it's better you turn it off if you don't have need for it.

I'm not sure about this though so it might be better to check but it's a posiable explanation at least.

http://www.pentaximaging.com/pdf/All_Bodies_Shake_Reduction_012208.pdf

Theme
I-berg was the winner last time and he came up with the idea to do "night-time scenes"
So look up your best night photo and submit it to me by PM or E-mail.

I might join this time, shot some night photos last friday that might be good

Rules
OK, an anonymous competition. (until voting is over).
Stefan(Anvh)/Dougf8 is/are going to act as overseer.
You send your photo to him/them, either by e-mail to [email protected]">[email protected],
or a link to it via PM.

They will then put all the entries on a specially made Photobucket account.
This means photos can be no longer than 800pixels on the longest size, use standard/normal compression.
If you don't know how to do this then send them the biggest photo you've so they can resize it for you.

They will then link all the photos to a thread for voting.

Do not submit your photo here, see above. This thread may be used for the purposes of encouraging and soliciting more entries by means of teasing and tickling potential entrants. You have been warned.

A new photo would be nice, but an old one is better than not entering at all. (might change if people get the hang of this).

You have until 13th November to enter. Stefan will then start a new thread, with the photos and you can then vote for your favourite from 14th-20th November.

Good Luck and have fun