Search results for 'sensor cleaning' - page 449
K5II - centre focus point - AF at f2.8 - What?
I'm confused as to what the question is, but this info may help. The AF sensor's f-stop rating has much to do with how far apart the 2 halves of it are spaced. A dim (i.e. small) lens will throw a narrow beam straight between these and miss them completely. A bright lens has a wide enough beam to...
Posted by sbrads on 27/04/2013 - 08:54
K5II - centre focus point - AF at f2.8 - What?
it should have been picked up by the reviews :shock: ' In a similar vein, I read that the sensor in the K5II is not the same as that in the K5, it having been redesigned - something to do with the size of the photo-sites? Only saw this once.
Posted by JohnX on 27/04/2013 - 13:50
K5II - centre focus point - AF at f2.8 - What?
it should have been picked up by the reviews :shock: ' In a similar vein, I read that the sensor in the K5II is not the same as that in the K5, it having been redesigned - something to do with the size of the photo-sites? Only saw this once. Where did you read this?
Posted by Smeggypants on 28/04/2013 - 20:58
K5II - centre focus point - AF at f2.8 - What?
[quote:3496ace15f="Algernon"]it should have been picked up by the reviews :shock: ' In a similar vein, I read that the sensor in the K5II is not the same as that in the K5, it having been redesigned - something to do with the size of the photo-sites? Only saw this once. Where did you read this?[/q...
Posted by cabstar on 28/04/2013 - 22:09
K5II - centre focus point - AF at f2.8 - What?
[quote:3496ace15f="Algernon"]it should have been picked up by the reviews :shock: ' In a similar vein, I read that the sensor in the K5II is not the same as that in the K5, it having been redesigned - something to do with the size of the photo-sites? Only saw this once. Where did you read this?[/q...
Posted by JohnX on 28/04/2013 - 22:18
K5II - centre focus point - AF at f2.8 - What?
[quote:3496ace15f="JohnX"][quote:3496ace15f="Algernon"]it should have been picked up by the reviews :shock: ' In a similar vein, I read that the sensor in the K5II is not the same as that in the K5, it having been redesigned - something to do with the size of the photo-sites? Only saw this once. W...
Posted by Smeggypants on 28/04/2013 - 23:15
AF Calibration charts
Thanks for that link. I'm sure there is some good info there but the rough and ready cornflake packet serves the same function - the one I have has a word search on the back and that's just great! What I am failing to grasp is how some lenses can focus OK on the viewing screen yet be out of focus...
Posted by JAK on 26/04/2013 - 17:29
AF Calibration charts
What I am failing to grasp is how some lenses can focus OK on the viewing screen yet be out of focus on the sensor and hence need adjustment, but not others. An explanation would be interesting and useful. John K I can't find the link now but I remember reading about this a year or two back. I ...
Posted by sbrads on 27/04/2013 - 09:04
Cleaning?
What's the best cleaning solution to use on the rear screen on my K5? Thanks, Roger.
Posted by coker on 26/04/2013 - 17:17
Cleaning?
Roger - if it's "oily" fingermarks and the like, I use the little alcohol wipes similar to those used in hospitals, prior to insertion of a syringe. They contain isopropyl alcohol, which will dissolve the oily film, but evaporate without damaging the screen. Alternatively, you could just use a damp,...
Posted by steven9761 on 26/04/2013 - 17:34
Cleaning?
Alcohols also denature plastics and make them brittle.
Posted by johnriley on 26/04/2013 - 18:09
Cleaning?
Tiny drop of washing up liquid and a microfibre cloth.
Posted by snappychappy on 26/04/2013 - 18:38
Cleaning?
That'll be the soapy cloth, then.... Thanks Steven & John. Roger.
Posted by coker on 26/04/2013 - 18:39
Cleaning?
Sensor cleaning swabs & solutions probably work OK as well -> clean the sensor and then the rear screen (or lenses/filters - they work well for these as well). OTOH, you could always fit a phono screen protector which can then be replaced when it gets too bad.
Posted by jeallen01 on 27/04/2013 - 10:55
Cleaning?
Saliva and bog roll here :) Waits for the predictable "I'm not buying you're 2nd hand cameras" comments - hee hee :)
Posted by Smeggypants on 27/04/2013 - 18:56
Switch-on noise
I think your camera is also known as a K-m (same beast) and if so the noise you are hearing is the sensor shake mechanism which is intended to dislodge dust particles from the sensor on start-up. It can be switched off in the menu, but there's no point in doing this. Just leave it as it is and d...
Posted by davidstorm on 26/04/2013 - 21:15
Switch-on noise
yup that's sensor shaking to knock of any dust. More modern cams like the K-5 ( and probably the K-30 ) use a more ultrasonic type shaking on startup which IMO works better
Posted by Smeggypants on 26/04/2013 - 22:02
Switch-on noise
yup that's sensor shaking to knock of any dust. More modern cams like the K-5 ( and probably the K-30 ) use a more ultrasonic type shaking on startup which IMO works better The K30 still has a variation on the old "brrrrr" sounding sensor cleaning system unlike the K5's silent whisper of (dust) d...
Posted by StephenHampshire on 26/04/2013 - 23:14
Lens calibration - Focus Tune software
This all makes me think the the sooner all DSLR's go mirrorless, the better. Surely the inaccuracy of the actual point of focus is down to the mechanical tolerances of the mirror adjustment and placement of the focus sensors. So with no mirror and the focusing being done by the image sensor sh...
Posted by Mannesty on 28/04/2013 - 10:00
Lens calibration - Focus Tune software
I focussed on the 'H' in 'However'. In pic 1 that clearly is out of focus, in pic 2 it looks good to me. I normally focus and recompose but in those kept the 'H' in the centre. The actual focus point might not coincide exactly with the red crosss :shock: So it's possible that you are focusing ...
Posted by JAK on 28/04/2013 - 10:10
