Search results for 'sensor cleaning' - page 406
K5 sensor stain or something else
Thanks for the advise Bernard
Posted by Frogherder on 29/09/2011 - 20:38
K5 sensor stain or something else
[quote:3496ace15f="Tyr"]It definitely looks like a fibre on the sensor. Invest in an Arctic Butterfly as the dust shake feature can't clean some things out as they will just come back eventually. A few days old K5, and I certainly would not be looking to be spending another £80-£90 on an arctic butt...
Posted by bychan on 30/09/2011 - 01:26
K5 sensor stain or something else
However, if I had to have used it on the K5 so soon after purchasing the camera, I would not be a happy bunny. Understandable sentiments, but hardly something that can be helped. A brand new camera is just as likely to get a fibre/dust or whatever on the sensor as an older one. To throw my two ce...
Posted by MarkTaylor on 30/09/2011 - 09:11
K5 sensor stain or something else
Good point Mark. Thinking about it I used swabs first on the K-5, having read of others experiences. I should have cleaned it earlier than I did in fact but was OK with cloning until I got the swabs and gave it a good clean. It has needed a couple of cleans since then too. It seems to attract dust f...
Posted by Gwyn on 30/09/2011 - 09:37
K5 sensor stain or something else
The brand new sensor had some kind of residue film on it from manufacturing What's this about, then? Has anyone else come across this?
Posted by ChrisA on 30/09/2011 - 10:04
K5 sensor stain or something else
The filters covering the sensor have coatings that should be treated with care, but it's the first time I've heard of a manufacturing film. Many things form films because of reaction with Oxygen in the air (air inhibited layers...)but if there were to be a film where would it go? Evaporate? Would...
Posted by johnriley on 30/09/2011 - 10:14
K5 sensor stain or something else
but if there were to be a film where would it go? Evaporate? Wouldn't that have happened in storage before delivery? Quite. Seems a bit dodgy to me. @ Mark: Are you completely certain it wasn't some gunk you'd managed to get on your AB before attempting the clean, that then got spread over the s...
Posted by ChrisA on 30/09/2011 - 10:17
K5 sensor stain or something else
@ Mark: Are you completely certain it wasn't some gunk you'd managed to get on your AB before attempting the clean, that then got spread over the sensor? I posted a thread on this very forum at the time when it happened and IIRC I was not the only forum member to have had the same problem when clean...
Posted by MarkTaylor on 30/09/2011 - 13:53
K5 sensor stain or something else
Okay I found the old thread . So to correct my previous comments slightly one other forum member (GDN) had the same problem with a new sensor. Smeggypants also had a similar problem but does not state whether the sensor was new and thought the 'gunk' came from the brush. I think I can rule that out...
Posted by MarkTaylor on 30/09/2011 - 14:00
K5 something loose inside!
Yup perfectly normal, I think most DLSR's with unbuilt image stabilizers do it to some degree. It can be quite noticeable at times, it's only the sensor shifting in the body. This is then moved about as required to stop image blur as you press the shutter release. Regards David
Posted by davidrobinson on 29/09/2011 - 19:50
K5 something loose inside!
On the K10D you can lock the mirror up and watch the sensor flopping about! Probably can with the K-5 too, at a guess.
Posted by ChrisA on 29/09/2011 - 19:53
K5 something loose inside!
On the K10D you can lock the mirror up and watch the sensor flopping about! Probably can with the K-5 too, at a guess. I'm sure you can if only to prove the point, but rest assured it's a perfectly normal Pentax DSLR IS feature. Regards David
Posted by davidrobinson on 29/09/2011 - 20:40
Shake reduction and focal length
If,say, I put a 50mm A series lense on my K5 and I input the focal length for the purposes of shake reduction, what do I input? Should it be 50mm or the digital sensor equivalent of 75mm?
Posted by Froggy on 01/10/2011 - 21:48
Shake reduction and focal length
If,say, I put a 50mm A series lense on my K5 and I input the focal length for the purposes of shake reduction, what do I input? Should it be 50mm or the digital sensor equivalent of 75mm? 50mm. Always the actual focal length. The focal length of a lens doesn't change just because the sensor ha...
Posted by ChrisA on 01/10/2011 - 22:02
Shake reduction and focal length
How does this change when you add Extension Tubes or a Teleconverter? I was using a 135mm SMC Takumar (M42 with adaptor) coupled to 68mm of Extension Tubes. What focal length should be input for this? It's still a 135mm lens, but is now 68mm further from the sensor. This must surely affect the c...
Posted by davidstorm on 01/10/2011 - 22:09
Shake reduction and focal length
If,say, I put a 50mm A series lense on my K5 and I input the focal length for the purposes of shake reduction, what do I input? Should it be 50mm or the digital sensor equivalent of 75mm? Focal length is focal length; it does not change when you put it on an APSc camera ;)
Posted by sterretje on 02/10/2011 - 05:56
Shake reduction and focal length
How does this change when you add Extension Tubes or a Teleconverter? I was using a 135mm SMC Takumar (M42 with adaptor) coupled to 68mm of Extension Tubes. What focal length should be input for this? It's still a 135mm lens, but is now 68mm further from the sensor. This must surely affect the c...
Posted by sterretje on 02/10/2011 - 06:08
Shake reduction and focal length
But surely the SR requires a focal length input only to calculate the approx magnification and hence the shake? This would be more with extension tubes, teleconverters etc so why isn't more SR needed in the algorithm calculation when they are added? For teleconverters, yes, more SR is needed, since...
Posted by ChrisA on 02/10/2011 - 22:59
Shake reduction and focal length
But surely the SR requires a focal length input only to calculate the approx magnification and hence the shake? This would be more with extension tubes, teleconverters etc so why isn't more SR needed in the algorithm calculation when they are added? For teleconverters, yes, more SR is needed, since...
Posted by dcweather on 04/10/2011 - 13:42
Shake reduction and focal length
There's no perfect answer to this question, other than "get a modern lens that communicates its focal length to the camera, allowing it to adjust the amount of SR it applies". Otherwise, you have a number of options: - set the minimum FL, and put up with less effective SR as you zoom to the lo...
Posted by ChrisA on 03/12/2011 - 22:36
