Search results for 'sensor cleaning' - page 619
DPI woes, how do I sort this please?
What is not clear to me then is why should we assume that a photographer performing resizing on a home computer would produce better results than a commercial software package connected to a specfic professional grade printing device, operated by an experienced technician? There is one obvious situa...
Posted by andrewk on 13/12/2013 - 09:06
K10d sharpness issues (or human fault!)
Hello! I have a K10d and i cannot take any sharp picture. In the beginning i had the 18-55 kit lens and i thought that the fault was on the lens quality but after that i bought the DA 35mm f2.4 and still i get soft and blurry pics. I shoot on manual, with speed over the 1/60 and f8 aperture, ISO...
Posted by stratosk on 03/01/2014 - 13:32
blown highlites
The dynamic range of the 16mp sensor used in most Pentax cameras is extraordinary. You can set the camera up to record an even wider range as suggested above. But the best way to maximise the range is to shoot in RAW. It's amazing how much highlight detail can be recovered in post processing. I ...
Posted by bwlchmawr on 06/01/2014 - 17:02
Noise and intermediate ISO settings
Just read this which I'd not seen before:- "Here is one ISO tip that many photographers aren’t aware of: keep your ISO setting to the industry standard numbers – 100, 200, 400, 800, 1600, 3200, etc. All digital cameras offer ISO settings between these numbers (such as ISO 250). But, what is really ...
Posted by dcweather on 25/01/2014 - 00:44
Viewfinder query
Sounds as though something along the lines of PK TETHER is what you're after. That would allow you to hook your camera up to a laptop/netbook (not sure if it would work with iPod/Tablet pc), ans you will be pretty-much seeing what your camera's sensor is picking up.
Posted by steven9761 on 06/02/2014 - 14:26
K3 continuous focus.
Have you updated the firmware to 1.02? I have noticed a difference. If my Sigma 150-500 OS misses focus it grinds back and forth through the focus range again till focus is achieved, once focused I have not had a problem keeping it there with AF.C and selc 2 (9 points). I think the secret is t...
Posted by McBrian on 12/02/2014 - 19:34
K7. White balance
No idea about the AWB, but the noise comes from the SR system doing its job :) Shifting the sensor around to stabilise the image, you can turn off the SR and the noise will stop ;) Cheers, Aleks
Posted by Aleks1298 on 28/03/2014 - 17:46
K3 focus issues most confusing
Additionally Dave, I would get your K-3 checked if I were you. It could have some mis-alignment of the mount or sensor - this would possibly create the effect you are seeing. If the alignment of the sensor is not parallel, the there will be a difference in the focal plane across the frame of the i...
Posted by davidstorm on 21/04/2014 - 20:45
K3 focus issues most confusing
It is evident that subject matter behind and in front of the butterfly are in focus. I'm sure you've done this, but if not, check your lens for grease marks or blemishes on the sensor. At these shutter speeds, I would be surprised if the problem is subject movement.
Posted by ronniemac on 21/04/2014 - 20:45
K3 focus issues most confusing
Another thought Dave, try taking some images of a page of small text at an angle, this would clearly show if there are areas of the images not consistently in focus across the frame and any differences in front/back focus. Ronnimac's suggestion above is a good one - if there is any smearing of anyt...
Posted by davidstorm on 21/04/2014 - 20:58
Sigma 105 Not Registering Aperture
as I was taking it off it flashed up the F number, about half way round when twisting it off. Did you have the camera switched on while removing the lens? I only ask because I was told the sensor acts like a vacuum cleaner sucking in dust if doing that. Could some of the contacts have shorted out ?
Posted by tyronet2000 on 29/04/2014 - 22:37
50-135 SDM not working
On Pentax Forum in the US a presumably unofficial interview with a Pentax engineer went as follows: "Q: Our survey found that the Pentax DA* 16-50mm and 50-135mm were the most prone to SDM failure. Do you know why this was? A: One could say that the AF components used in these lenses was prone...
Posted by CMW on 29/04/2014 - 23:48
50-135 SDM not working
On Pentax Forum in the US a presumably unofficial interview with a Pentax engineer went as follows: "Q: Our survey found that the Pentax DA* 16-50mm and 50-135mm were the most prone to SDM failure. Do you know why this was? A: One could say that the AF components used in these lenses was prone...
Posted by cardiffgareth on 29/11/2016 - 23:24
Monitor Calibration
My trusty old monitor finally died last Friday - great week as the ridiculous 'American style' fridge freezer the size of shed that I was persuaded to buy a couple of years ago stopped freezing and the repair estimate would pay for a new 'normal' fridge freezer - and then the dishwasher totally pac...
Posted by fritzthedog on 01/05/2014 - 08:50
K5 randomly releasing mirror upon half-way press of the shutter
Ok after several weeks I haven't observed anything new, battery (original) full or half empty, different SDHC cards, different (Pentax and third party) lenses. Sometimes it simply flips the mirror several times and only after that allows shooting or focusing. Latest firmware, I forgot to say, mostly...
Posted by Ohawa on 11/06/2014 - 07:57
K5 randomly releasing mirror upon half-way press of the shutter
Ok after several weeks I haven't observed anything new, battery (original) full or half empty, different SDHC cards, different (Pentax and third party) lenses. Sometimes it simply flips the mirror several times and only after that allows shooting or focusing. Latest firmware, I forgot to say, mostly...
Posted by bettyswolloks on 11/06/2014 - 08:03
150-500 Focusing Problems/Sigma Service
I had a similar problem with my 120-400. I had it repaired by Sigma, and was pleased with their service; I think the process took about 10 days. They replaced the MR Sensor [whatever that is].
Posted by RobS on 25/05/2014 - 17:06
Banding/pixellation
Whatever banding you're seeing in those - I can't see it! Faint in the originals, obvious if you take the images and compress the levels: There's nothing untoward in , apart from a couple of bits of crap on the sensor, so I think the clear culprit is Faststone, as it was in Mike-P's ca...
Posted by ChrisA on 01/06/2014 - 22:25
Banding/pixellation
The K5 has an LCD of just under 1180x780 - 921k compared to the sensor at 4928 x 3264. So, every pixel on the display will represent 16 (or so) on the sensor. The colour depth of the LCD will not be the same as the sensor capability. This will result in less colours, transitions will not be a...
Posted by Gamka on 03/06/2014 - 11:03
Sensor marks
I recently bought a pretty recent K5 II second hand and have been getting used to it and I am really enjoying it. But recently I have noticed, particularly on portrait format pictures rather than landscape, dirty smudges on the pictures. See below a full sensor picture and a cropped area. ...
Posted by andymat on 08/06/2014 - 18:11
