Search results for 'sensor cleaning' - page 294
Depth of field-hyperfocal distance
Depth of field tables are valid only for a particular size of enlargement/print. The ones on lenses are most often defined for an 8x10 print viewed from 10 inches. The "standard" is the circle of confusion at the specified magnification. Using the APS-C sized sensor we have, an 0.02" circle of c...
Posted by Canada_Rockies on 02/05/2010 - 03:50
K-x TIPA awards
Congratulation !!! but: I like a native light and the Pentax K-x allows me to take some pictures with it. I think that this camera has the best sensor in the Pentax K product line. What a pity, Pentax reduced some interest and important functions and connectors, which don´t have a major effect i...
Posted by kff on 19/05/2010 - 09:22
K-x TIPA awards
I agree, a K200D build with the Kx sensor ... !! But then it possibly starts to get into the K7 marketspace ... maybe the next iteration?
Posted by rkt on 19/05/2010 - 09:32
why pentax is better?
what about the shot taken? If you take a shot with your film camera, then transfer the lens to your new Pentax camera, you will see a difference in the images. Image quality is largely influenced by the lens but there is a significant difference in the image size. The image produced by a 50mm...
Posted by Mannesty on 26/04/2010 - 16:02
excessive noise
I have recently noticed that my images, even at 100 iso, appear to have more noise. Could this be due to the fact that I haven't cleaned my sensor in 1 and half years??? I have used the blower once or twice. I am one those who is a afraid of cleaning the sensor because of cost if I XXXX it up. ...
Posted by kiwao on 27/04/2010 - 00:46
excessive noise
Not sure whether you mean digital noise (and then, now you have more noise than what?), or do you mean sensor dirt. Post some example picture so we can find out. If it is dirt, then it doesn't matter what ISO you use, and you shouldn't be too much afraid of cleaning sensor (or raher filter that sit...
Posted by piotro on 27/04/2010 - 00:51
excessive noise
A senor will always display some noise because but at iso100 the noise will only be really visible when viewing at or over 100% zoom and at the darker areas, this with CCD sensor a CMOS sensor I would expect to show more noise, certainly with the K-X because that's extended ISO. There is a glass ...
Posted by Anvh on 27/04/2010 - 01:00
excessive noise
A senor will always display some noise because but at iso100 the noise will only be really visible when viewing at or over 100% zoom and at the darker areas, this with CCD sensor a CMOS sensor I would expect to show more noise, certainly with the K-X because that's extended ISO. Thanks for the quick...
Posted by kiwao on 27/04/2010 - 01:40
excessive noise
Stefan, I think you need to clean your sensor :wink:
Posted by terje-l on 27/04/2010 - 07:49
excessive noise
Stefan, I think you need to clean your sensor :wink: I think Terry is correct. If that link is a recent image I can see dust marks and your sensor needs a clean. Can you recommend a good kit. Thanks again
Posted by kiwao on 27/04/2010 - 08:04
excessive noise
Stefan just clean it with a Arctic Butterfly the sensor has a filter over it so you Will not damage it James
Posted by pink on 27/04/2010 - 08:08
excessive noise
The Arctic Butterfly from Visible Dust is about the best dry cleaning system I have ever used. Pentax themselves can supply a wet cleaning system, which you can buy from this site, but I try to avoid wet cleaning if possible. It takes practice to get it really clean and smudge free. I haven't nee...
Posted by Mannesty on 27/04/2010 - 08:12
K7, should I wait ?
I kinda assumed that they all were approx equal at low iso (100-400'ish) ? Not fully right the K10D is a CCD sensor, its more uniform and has a wider dynamic range then the CMOS sensors therefore it's hard too beat at the lower ISO. As for the K7 vs the KX, the KX sensor produce quite some moiré an...
Posted by Anvh on 29/04/2010 - 12:49
K7, should I wait ?
... As for the K7 vs the KX, the KX sensor produce quite some moiré and demosaicing artefacts while the K-7 is cleaner and it also has more pixels, therefore with the lower ISO where the noise is low these play a part how clean the photo looks and that's why the k-7 is better. ... hmm, inte...
Posted by Leech on 29/04/2010 - 13:08
K7, should I wait ?
Here you go K-X K-7 The photo with the red, green, blue and several gray circles really shows the difference. Here he put them against each other
Posted by Anvh on 29/04/2010 - 16:29
K7, should I wait ?
Here you go K-X K-7 The photo with the red, green, blue and several gray circles really shows the difference. It’s too late to read all that stuff tonight but are you sure about that? What ISO was used for the respective shots? If the charts for the Kx were taken below the sensor’s base I...
Posted by Shaky on 29/04/2010 - 23:08
K7, should I wait ?
What ISO was used for the respective shots? If the charts for the Kx were taken below the sensor’s base ISO it would be something of an apples to oranges comparison (as I understand it improved high ISO performance typically entails a higher sensor base ISO.) Yes precisely and the base ISO of the K...
Posted by Anvh on 29/04/2010 - 23:39
K7, should I wait ?
the base ISO of the KX is most likely slightly below the ISO400 while the base ISO of the K-7 is around the ISO200 so the K-7 is better at lower ISO and that's what we are talking about and of course more things come into play than base ISO, the resolution of the sensor and the algorithms behind it....
Posted by Shaky on 29/04/2010 - 23:59
K7, should I wait ?
What ISO was used for the respective shots? If the charts for the Kx were taken below the sensor’s base ISO it would be something of an apples to oranges comparison (as I understand it improved high ISO performance typically entails a higher sensor base ISO.) Yes precisely and the base ISO of the K...
Posted by Leech on 04/05/2010 - 09:45
K7, should I wait ?
As for the iso 100 problem I will only have problem in snowy conditions :P we a'int got that much sun i Denmark anyway.. lol Well that's the thing, I don't think it's an ISO100 problem only. The Moire, that you see isn't fully a sensor related thing and so is the rest. It's something that can be fi...
Posted by Anvh on 04/05/2010 - 12:49
