Search results for 'sensor cleaning' - page 448
Shake Reduction and 'action' photography
If you switch on live view and pan the camera (K-5) smoothly, you'll see that the image only seems to 'jump' when you start or stop panning. Suggesting that as long as you start early and follow-through afterwards, you might get benefit of SR (although it might affect the effectiveness of smoothing ...
Posted by kh1234567890 on 08/05/2013 - 23:25
Shake Reduction and 'action' photography
There's also the extra power being used to hold the mirror up in live view. When not in live view there's power being used to hold the sensor in the centre position, and when SR is off.
Posted by Smeggypants on 08/05/2013 - 23:42
Shake Reduction and 'action' photography
When not in live view there's power being used to hold the sensor in the centre position, and when SR is off. According to the timing diagram in Fig.8 of the sensor is only driven in the interval between mirror up and mirror down.
Posted by kh1234567890 on 08/05/2013 - 23:49
Shake Reduction and 'action' photography
When not in live view there's power being used to hold the sensor in the centre position, and when SR is off. According to the timing diagram in Fig.8 of the sensor is only driven in the interval between mirror up and mirror down. That would make perfect sense from a power efficiency POV. I suppos...
Posted by Smeggypants on 09/05/2013 - 00:28
Unusual lens problem
Yesterday my 100mm WR DFA Macro lens started behaving oddly. The autofocus was jerky and inaccurate. The back button I use for autofocus seemed to fire the shutter or at least flip the mirror! The exposure readings were flashing in the screen. Then it would fire the shutter after a few seconds witho...
Posted by dcweather on 24/04/2013 - 23:01
Maybe light at the end of the tunnel?
..... but I feel the future is in smaller sensors with higher resolutions. At 16MP on an APS-c sensor, you've hit the limit of lens resolution even with the best primes available. So if you need a genuine increase the only way is a bigger sensor. Unfortunate but unless they re-write the laws of Phy...
Posted by johnwhit on 25/04/2013 - 13:10
Maybe light at the end of the tunnel?
..... but I feel the future is in smaller sensors with higher resolutions. At 16MP on an APS-c sensor, you've hit the limit of lens resolution even with the best primes available. So if you need a genuine increase the only way is a bigger sensor. Unfortunate but unless they re-write the laws of Phy...
Posted by gwing on 25/04/2013 - 13:58
Maybe light at the end of the tunnel?
The resolution may increase on the sensor, but just how big do you plan on printing or viewing? My K10d (10.2 Mpx) prints 24x36 just fine, even with minor cropping. I would love a K5ii/s for the high ISO treatment. The K10 has a CCD sensor, and the colour treatment at low ISO cannot be beat, but CMO...
Posted by Canada_Rockies on 25/04/2013 - 17:05
Maybe light at the end of the tunnel?
Very happy with the K30. Awesome sensor, magical IQ, speedy for the most part and just feels perfect in the hand.
Posted by Russ on 25/04/2013 - 22:56
Maybe light at the end of the tunnel?
Given the comparisons between the ASPC D7100 & FF D600 it seems the FF argument has just about reached 100% pointlessness. Slight differences at very high ISO? Forget it. 24mp AA filter less in a K5 body would do nicely, then again I don't want anymore storage memory used of more slowing down of ...
Posted by Smeggypants on 26/04/2013 - 02:29
Maybe light at the end of the tunnel?
I'm not bothered about how many megapixels my cameras have or how close they are stuffed on the sensor. All I'm interested in is image quality and all my cameras (K-x, K-5, K-5IIs) are capable of producing stunning results, even in poor light. That's good enough for me:D
Posted by davidstorm on 05/05/2013 - 21:34
Maybe light at the end of the tunnel?
I'm not bothered about how many megapixels my cameras have or how close they are stuffed on the sensor. All I'm interested in is image quality and all my cameras (K-x, K-5, K-5IIs) are capable of producing stunning results, even in poor light. That's good enough for me:D And that is the bottom l...
Posted by sussexwolf on 05/05/2013 - 21:39
Maybe light at the end of the tunnel?
I'm not bothered about how many megapixels my cameras have or how close they are stuffed on the sensor. All I'm interested in is image quality and all my cameras (K-x, K-5, K-5IIs) are capable of producing stunning results, even in poor light. That's good enough for me:D Same here. :) ( still wa...
Posted by Smeggypants on 05/05/2013 - 22:07
Maybe light at the end of the tunnel?
But based on this apparent principle of 'ever decreasing returns' as we reach into higher bit depths, can you really expect your '2 stops worth' even if you get 16bit? There has to be to get any benefit. I seem to recall that my old *istD was 14 bit but only had only 12.5 bits resolution above noi...
Posted by gwing on 14/05/2013 - 07:41
Maybe light at the end of the tunnel?
Don't forget there is wanted signal within the noise floor, so it makes sense to have an ADC with more dynamic range than the S/N ratio of the sensor. That way NR algorithms have something to work on. :) Generally analogue noise ( including the wanted signal ) is prettier ( and sounding better in...
Posted by Smeggypants on 14/05/2013 - 08:36
Maybe light at the end of the tunnel?
Bit depth does not automatically translate into DR, but people use the terms as if they're interchangeable. For instance the Kx easily beat the K7s DR. Both 12 bit. And the K30 has very similar DR to the K5, at equal ISO. 12 vs 14 bit. I think the difference between 12 and 14 bit is overplayed. Ac...
Posted by Smeggypants on 14/05/2013 - 10:36
Maybe light at the end of the tunnel?
But the improvement from K7-K5 has very little to do with the extra bits. It's more to do with the new sensor design. The K30 has 12 bits, but is hard to differentiate from the K5 in DR terms. The difference is a lot more subtle than even the difference between the K5 and K5iis. Although you're t...
Posted by Pentaxophile on 14/05/2013 - 12:48
Maybe light at the end of the tunnel?
But the improvement from K7-K5 has very little to do with the extra bits. It's more to do with the new sensor design. The K30 has 12 bits, but is hard to differentiate from the K5 in DR terms. The difference is a lot more subtle than even the difference between the K5 and K5iis. Although you're t...
Posted by Smeggypants on 14/05/2013 - 15:53
K5II - centre focus point - AF at f2.8 - What?
I'm still not at all clear though why/how this works, especially as Pentax say AF at f2.8 is an improvement (this from the original specs for the K5II). On the basis that AF gets more difficult/impossible at smaller F numbers, surely then the converse is true, so why shout about 'improving' AF point...
Posted by sbrads on 26/04/2013 - 15:24
K5II - centre focus point - AF at f2.8 - What?
JohnX, I'm as confused as you are! John K (Must be an issue only if your name's John :) ) Edit: I'd have thought more light / wider aperture, the better the AF functions. Further edit: Could it be too much light overpowers the sensor or whatever it uses to ascertain the focus point?
Posted by JAK on 27/04/2013 - 01:12
