Search results for 'sensor cleaning' - page 620
Sensor marks
Hi Andy I would give it a wet clean, I think you are right in that someone has previously tried to clean and probably used too much solution. The pad you use to clean the sensor should be only very slightly damp, not wet, otherwise it will leave smears. I have successfully used 'Pec Pad' lens...
Posted by davidstorm on 08/06/2014 - 18:56
Sensor marks
Thank you David. I will give this a, very careful, try. And, yes it has helped. Many thanks,
Posted by andymat on 08/06/2014 - 20:54
Sensor marks
Just one more thing to add to David's advice is to ensure your battery is fully charged before you start
Posted by gartmore on 09/06/2014 - 08:14
Sensor marks
Yes, I understand. Thanks Ken
Posted by andymat on 09/06/2014 - 10:07
Lens Not Reading F Stops
Sounds like a problem with contacts somewhere and because it's the same on several bodies it must be the lens. Possibly just needs some internal contacts cleaning. Send it back. --
Posted by Algernon on 24/06/2014 - 20:26
Sigma 70-300 not working
I experienced a similar problem with mine. I found that cleaning the contacts every so often normally resolved the problem. A lint free cloth is the best thing to use. Also, switching the camera off, taking the lens off and refitting it had the desired effect. Not terribly convenient, though!!
Posted by LabradorMick2 on 26/06/2014 - 17:43
Sigma 70-300 not working
I experienced a similar problem with mine. I found that cleaning the contacts every so often normally resolved the problem. A lint free cloth is the best thing to use. Also, switching the camera off, taking the lens off and refitting it had the desired effect. Not terribly convenient, though!! If th...
Posted by autumnlight on 26/06/2014 - 20:31
Focus with K-5/DA*300/TC issues
Hi, it still seems to me that much as John may have an adjustment problem the distance focused on is relevant. At F4 at 10 metres a 300mm lens has a depth of field from 9.91 metres to 10.1 metres ie 190 millimetres. Manageable for bird shots and better still if stopped down to F5.6 where it ...
Posted by wvbarnes on 08/08/2014 - 14:57
Focus with K-5/DA*300/TC issues
These are indeed noticeably better but it is quite difficult to assess on such large subjects that have a wide range of focus points across them. The acid test will come when focussing on a very small and defined point. However, I still think there may be an equipment issue here. Not sure if it...
Posted by davidstorm on 11/08/2014 - 23:09
Focus with K-5/DA*300/TC issues
If you're looking for sensor or lens element alignment problems then you need a proper test setup, which I'd suggest is camera/lens on a tripod at 90 degrees to a nice frame-filling brick wall then shoot away in both AF and LV modes, wide-open, before posting results on here. Make sure you use a...
Posted by JohnX on 13/08/2014 - 18:41
Pentax lens repairs?
Always use a lens hood and that will avoid most damage. The coating marks just might polish out. In extremis I use some lens fluid, very sparingly. I would try the cleaning route first and then see if the images are affected. If not, then replacing a front element might be quite an expensive job....
Posted by johnriley on 03/09/2014 - 18:01
speck in viewfinder
Hi all. I have a k5 and noticed tonight when looking through the viewfinder, there is a small speck just above the centre focus circle. I removed the lens and could still see it, so not on the lens, and it doesnt show on images, so not on the sensor. Ive cleaned the rear eyepiece but its still ther...
Posted by scarr1 on 24/09/2014 - 00:02
speck in viewfinder
It's probably on the underside of the prism/screen, try GENTLY using something like a 'Rocket Blower' inside the body underneath the prism box but NEVER touch the screen with anything and be careful not to touch the sensor! If it's inside the prism box best to leave it there...irritating but it won...
Posted by michaelblue on 24/09/2014 - 06:07
speck in viewfinder
Small marks on focus screens and dust inside the prism box are common and do not cause any issues. They can be cleaned but it is a risky business unless done professionally - I speak from experience! My K5 and K5IIs have both got marks on the screens. I am so used to them I do not even notice ...
Posted by fritzthedog on 24/09/2014 - 07:59
Viewfinder magnification?
Hi all, I have a K5 II, though recently dug out my old Olympus OM2 for a day or so - first time in a decade probably. Long story short I found composing pictures so much more instinctual, and basically enjoyable, with a large full-frame size viewfinder. I haven't owned enough SLRs / DSLRs to know if...
Posted by fsharp on 05/10/2014 - 22:23
Viewfinder magnification?
I'm assuming that the physics of the matter is that crop-frame sensor cameras have smaller viewfinders than full-frame. I believe your assumption is wrong because the light path to the viewfinder does not involve the sensor at all. It's only when the mirror lifts the light falls on the sensor. ...
Posted by bforbes on 05/10/2014 - 22:49
Viewfinder magnification?
The light path to the viewfinder does not involve the sensor at all, is indeed correct Barrie. However, a 35mm format camera has a wider field of view than an APS-C (for any identical lens) so needs a larger mirror to "see" the full image. If the mirror box and viewfinder were no different in siz...
Posted by K10D on 05/10/2014 - 23:19
Coating problems on new lens: Pentax HD DA Limited 35mm F2.8 Macro Lens
Hey guys, I'd like to know if anyone has had any issues with this lens from Amazon UK or other dealers. A couple of weeks ago this lens was £ 319. Yes, I know it is an incredible price and I didn't hesitate to order, although I assumed it was a mistake by Amazon. Anyway, when I received it, I spo...
Posted by Nudelsieb on 21/11/2014 - 19:30
DA*300mm focusing problem again!
Having waited 2 months to get the SDM motor replaced by Pentax for £200 it has now developed another fault after a month back. The AF failed to do anything. Tried cleaning contacts, new battery etc. then realised that MF was just turning round and round without changing the focus at all. Then it wil...
Posted by dcweather on 17/01/2015 - 15:39
Lens mount stiff.......
The last few times I've changed lenses to and from my 100mm Dia macro and the sigma 150-500 (my most-used lenses)on my K5, both lenses have mounted smoothly enough but when taking either of them off, the lens needs more than the "usual" amount of oomph to turn to the unlocked position. Is this ge...
Posted by coker on 03/02/2015 - 17:03
