Search results for 'sensor cleaning' - page 392
think of a digital pentax advice please
hmm see this bothers me it not being weather sealed being a landscape shooter im outside living in wales we get alot of rain lol Then look for a K10D, most user say that at the lowest ISO level the K10D still give you a better quality pixels then the K20D. The difference is in the sensor, CCD is ve...
Posted by Anvh on 20/07/2011 - 18:17
Built in shake reduction. Does this really works?
I've compared images using my K20D and K5 with my Sigma 150-500mm OS lens at 500mm and can see no difference whether using the lens OS, camera SR, or both (oddly). I can see a significant difference when no stabilisation is used. My opinion, yes it does work, and very well. With a K5 armed ...
Posted by Mannesty on 20/07/2011 - 11:01
Built in shake reduction. Does this really works?
With a K5 armed with a GPS unit, it'll even track the stars for up to 300 seconds. That's got to mean that, if the stabilisation is digital, it uses very fine stepping increments. I think however it probably uses an analogue sensor positioning system, which is stepless. For some reason I am strang...
Posted by Mike-P on 20/07/2011 - 12:47
Built in shake reduction. Does this really works?
With a K5 armed with a GPS unit, it'll even track the stars for up to 300 seconds. That's got to mean that, if the stabilisation is digital, it uses very fine stepping increments. I think however it probably uses an analogue sensor positioning system, which is stepless. For some reason I am strang...
Posted by vrapan on 20/07/2011 - 12:50
Built in shake reduction. Does this really works?
With a K5 armed with a GPS unit, it'll even track the stars for up to 300 seconds. That's got to mean that, if the stabilisation is digital, it uses very fine stepping increments. I think however it probably uses an analogue sensor positioning system, which is stepless. For some reason I am strang...
Posted by Mannesty on 20/07/2011 - 17:52
Built in shake reduction. Does this really works?
Do not use shake reduction if using a tripod, monopod or resting on say a wall Bill, might I ask a daft question....why would you not still use SR if using a tripod etc? Do you mean actually turn it off? Yep although you could use it on a monopod though. The problem is that if the movement is below...
Posted by Anvh on 20/07/2011 - 21:32
Built in shake reduction. Does this really works?
[quote:3496ace15f="wvbarnes"]Do not use shake reduction if using a tripod, monopod or resting on say a wall Bill, might I ask a daft question....why would you not still use SR if using a tripod etc? Do you mean actually turn it off? Yep although you could use it on a monopod though. The problem is ...
Posted by Smeggypants on 20/07/2011 - 23:46
Built in shake reduction. Does this really works?
LOL :) I don't do blind belief. It's unhealthy :) I'm actually interested in the mechanics of this and want to learn about it, rather than just blindly believe something. Hopefully someone knows the answer. Stefan mentions a feedback loop. Now there's an obvious feedback loop in normal...
Posted by Smeggypants on 21/07/2011 - 00:59
Built in shake reduction. Does this really works?
Regarding SR on a tripod, without SR we can assume the sensor is stationary. But in fact the sensor is always being held in position by some magnets under the control of the movement detection. If the movement detection is subject to any input then it will move the sensor, and likewise if it gener...
Posted by karma mechanic on 21/07/2011 - 10:40
Built in shake reduction. Does this really works?
When SR is off on K20D and later bodies the sensor is clamped into position, not free moving. On a tripod, I would suggest this means the highest possible accuracy and therefore a good idea where work of the highest precision is required.
Posted by johnriley on 21/07/2011 - 11:23
Built in shake reduction. Does this really works?
To respond to Smeggy - why switch SR off on a tripod? The SR is optimised to the frequency of normal hand shaking - a quite low frequency. When rigidly mounted on a tripod, the natural frequency of movement is much higher (the hand normally damps out the high frequency). Control theory indicates ...
Posted by timd on 21/07/2011 - 11:49
Built in shake reduction. Does this really works?
Regarding SR on a tripod, without SR we can assume the sensor is stationary. But in fact the sensor is always being held in position by some magnets under the control of the movement detection. If the movement detection is subject to any input then it will move the sensor, and likewise if it gener...
Posted by Smeggypants on 21/07/2011 - 13:39
Built in shake reduction. Does this really works?
Thanks Tim, that sheds more light on it. Useful info and diagram in . Thanks the Pentax pdf was very helpful although I had to laugh when it said 24 million lenses were compatible with it - Think the Marketing Person entered 'feedback loop' of stupidty there. :) Regarding clamping in posit...
Posted by Smeggypants on 21/07/2011 - 13:47
Built in shake reduction. Does this really works?
More about it than you ever wanted to know in this Pentax patent: http://www.patents.com/us-20080226276.html If you wade your way through to item 196 it does say what happens when SR is off - the calculations are still performed in order to hold the sensor electromagnetically in its mid-position....
Posted by karma mechanic on 21/07/2011 - 14:11
Built in shake reduction. Does this really works?
The sensor movement is also discussed for the K-7 in regard to its possible interaction with blur induced by shutter acceleration in article - complete with the pictures that are omitted in the patent application above. See section 5.5 in particular. Had a look at this and my brain hurts. Tha...
Posted by Northgrain on 21/07/2011 - 14:35
Built in shake reduction. Does this really works?
Hopefully someone knows the answer. Stefan mentions a feedback loop. Now there's an obvious feedback loop in normal workings of the SR. i.e 1] camera detects movement and moves the sensor to compensate, 2] camera detects less movement and moves the sensor less to compensate 3] Image is stabi...
Posted by Anvh on 21/07/2011 - 18:32
Built in shake reduction. Does this really works?
More about it than you ever wanted to know in this Pentax patent: http://www.patents.com/us-20080226276.html If you wade your way through to item 196 it does say what happens when SR is off - the calculations are still performed in order to hold the sensor electromagnetically in its mid-position....
Posted by Smeggypants on 21/07/2011 - 21:42
K20D to K-R?
Well it is not in between really it is just a k-5 with a worse sensor. Having said that I almost despise the crammed product lineups of other manufacturers. At least with Pentax things are clear, the K-5 is a serious step up to the K-r simple, however the K-r retains plenty of the main characteristi...
Posted by vrapan on 21/07/2011 - 22:44
K20D to K-R?
Some other considerations when thinking about the KR over the K7/K5. The KR cannot be gripped!cannot be used with the CS-205 remote! Doesn't have an infra-red sensor to the rear!No weathersealing!etc......... If you want quality, in terms of build and IQ buy a K7/K5.;-) I went from KR to K7. Reg...
Posted by chrissinkpen on 27/07/2011 - 07:34
ISO3200 but what body
As some if you have noticed from the exif I took this in 2008 with my old k100d. I have been going through my archive of images for an exhibition, so have been importing them into lightroom 3. I was absolutely astounded at the results... so do we really need high ISO capable bodies or is software d...
Posted by cabstar on 27/07/2011 - 10:58
