Search results for 'sensor cleaning' - page 382
Returned K5 - Where to now?
That would mean the Sony and Nikon cameras would suffer from it as well! :shock: :lol: If it's the sensor...
Posted by Anvh on 19/05/2011 - 22:12
Returned K5 - Where to now?
That would mean the Sony and Nikon cameras would suffer from it as well! :shock: :lol: If it's the sensor... It must be the sensor as the K7 has less CA with the same lenses. Perhaps the others correct for it automatically. However... I think the CA in the OP's shot is from shooting a bright ref...
Posted by Pentaxophile on 19/05/2011 - 22:39
Returned K5 - Where to now?
I've had similar shots from P&S. These were taken at f/2.4 a lot of P&S cameras have similar sized apertures. Erm... You don't seem to understand how DoF works. P&S cameras (2/3in sensor) with an f/2.4 aperture will have the DoF of an APS-C DSLR lens at f/25!
Posted by Tyr on 19/05/2011 - 22:43
Returned K5 - Where to now?
I thought DOF was down to the focal length, not the size of the sensor ???
Posted by Smeggypants on 20/05/2011 - 00:54
Returned K5 - Where to now?
I thought DOF was down to the focal length, not the size of the sensor ??? A quick look at this and your all set. Best regards
Posted by K10D on 20/05/2011 - 05:41
Returned K5 - Where to now?
All i can say is Clifton Cameras are great. I had a sensor stained k-5 they turned mine around in 3 days. great customer service, after sales etc.
Posted by Glover on 20/05/2011 - 08:02
Returned K5 - Where to now?
I thought DOF was down to the focal length, not the size of the sensor ??? Only in a simplistic sense, in fact it's down to magnification. It relates to a lens focal length but also the format it is projecting its image onto. This is why different formats have different "standard" lenses to give ...
Posted by johnriley on 20/05/2011 - 08:12
Returned K5 - Where to now?
Sorry to say this, but judging by the photos posted (which are awful) I cannot help but feel this is yet another case of someone who knows very little about what they are doing and then critises the equipment. The interent is full of this. A bit harsh perhaps, especially to a newcomer to our forum. ...
Posted by fatspider on 20/05/2011 - 10:23
Returned K5 - Where to now?
I thought DOF was down to the focal length, not the size of the sensor ??? Only in a simplistic sense, in fact it's down to magnification. It relates to a lens focal length but also the format it is projecting its image onto. This is why different formats have different "standard" lenses to give ...
Posted by Smeggypants on 26/05/2011 - 00:35
Returned K5 - Where to now?
Depth of field is dependent on exactly four parameters: the focal length, subject distance, aperture (F number) and the circle of confusion diameter. The first three are objective measures but the last is subjective, which makes sense when you consider how much something is out of focus is an indivi...
Posted by rparmar on 26/05/2011 - 03:45
Returned K5 - Where to now?
Depth of field is dependent on exactly four parameters: the focal length, subject distance, aperture (F number) and the circle of confusion diameter. The first three are objective measures but the last is subjective, which makes sense when you consider how much something is out of focus is an indivi...
Posted by Smeggypants on 26/05/2011 - 04:33
Returned K5 - Where to now?
The circle of confusion is a parameter that can be decided upon. Make your requirement for this smaller and you need a higher resolution lens. In general, smaller formats have a smaller circle of confusion to make a standard print, say 12" x 16", of the the same quality. This means that lenses fo...
Posted by johnriley on 26/05/2011 - 08:00
Returned K5 - Where to now?
Ahhh!! Thanks rparmar. I think you've provided the bit I'm missing. i.e the circle of confusion diameter is dependent on sensor size. It is, because CoC is based on observing a finished print. A smaller original (smaller sensor) needs to be blown up more to get to that same print size. Glad I co...
Posted by rparmar on 26/05/2011 - 13:25
K10D 22Bit D/A vs K5's 14 bit
The 22-bit AD converter in the K10D is just to read off the CCD which is an analogue device, this 22-bit output is then sampled to a 12-bit RAW. I don't think the sensor is really capable of using that 22-bit AD converter. CMOS sensors are still analogue but you can build all the relevant AD and ...
Posted by Tyr on 20/05/2011 - 11:29
K10D 22Bit D/A vs K5's 14 bit
The K10D's CCD - is it better for daylight use vs the K5's CMOS, which is better for low light ones? The sensor in the K5 is a real step forward so under almost any circumstances it will probably preform better. With the Smasung sensor in the K20D and the K7 some said the K10D was better under dayl...
Posted by Anvh on 20/05/2011 - 18:41
K10D 22Bit D/A vs K5's 14 bit
With the Smasung sensor in the K20D and the K7 some said the K10D was better under daylight. You can only assume that people who say tings like that spend all their time comparing images at 100% on a computer screen, rather than taking and printing pictures!
Posted by Pentaxophile on 21/05/2011 - 13:29
K10D 22Bit D/A vs K5's 14 bit
at the end of the day an extra 2 bits you keep are of far greater value than an extra 10 bits you throw away, regardless of what you use you make of them before ditching them. There is something else behind the reason to use a 22bit A/D converter, what you are comparing are two different things actu...
Posted by Anvh on 21/05/2011 - 22:24
K10D 22Bit D/A vs K5's 14 bit
The dynamic range at higher ISOs is still higher though ... if you compare the Dynamic Range at DXO of the two cameras here ...... http://www.dxomark.com/index.php/en/Camera-Sensor/Compare/Compare-sensors/%28appareil1%29/212|0/%28appareil2%29/676|0/%28onglet%29/0/%28brand%29/Pentax/%28brand2%2...
Posted by Smeggypants on 18/06/2011 - 21:26
K10D 22Bit D/A vs K5's 14 bit
you can see the trend if more gain was applied to the K10D sensor to give higher ISOs 1600 Will get back on that because i've read that the K10D couldn't make use of all the bits inside 12bit file and neither could the K20D, the K5 is probably the first Pentax camera that has the potential to use mo...
Posted by Anvh on 18/06/2011 - 21:48
Will I Love the K-5
I've made my decision, I won't be buying a K5 unless I can have a cast iron guarantee that I will not experience any of the problems other users have encountered. Agreed on the terrible QC of the early models. I thankfully missed the sensor stain issue but had a bad body for AF. My K-5s are both ...
Posted by Smeggypants on 24/05/2011 - 17:35
