Search results for 'sensor cleaning' - page 656
uestion re: shake reduction.
if using sr with a tripod causes blur in the images... what happens if you have good technique, and steady hands....no tripod...will sr induce blur? Well unless the camera can tell the difference between being held by a hand, and by a tripod mount, logically this must be so if you can hold it ste...
Posted by ChrisA on 14/04/2008 - 07:24
Megapixel theory
Thanks for that John. So why are so many people being drawn in to the 'must have more pixels' trap I wonder? same reason people are always drawn into whatever trap it is this week. The MHz myth in computing lasted a very long time (although it stayed true longer than the MP myth too). The p...
Posted by Mongoose on 16/04/2008 - 23:53
Megapixel theory
I was always told that the optimum distance for viewing a print depended on the focal length of the lens it was taken with as well as the amount of enlargement. eg a wide angle lens used for frontal facial portraits will give your sitter a big nose but move in closer and the perspective becomes n...
Posted by Bob and his Pentax on 17/04/2008 - 16:50
Megapixel theory
mongoose...the flipside of that argument is this: for years pro's balked at af, built in flashes and ttl flash metering. left to thier own devices, pros would impede development of better cameras, it's the amateurs that drive development. we're in a catch 22. We need to produce images amauers...
Posted by Don on 17/04/2008 - 19:15
Megapixel theory
Can anyone explain to me why noise becomes more of a problem with higher pixel chips please? This recently posted article may (or may not) shed some light ;) on the issues of sensor technology: http://www.anandtech.com/digitalcameras/showdoc.aspx?i=3290 There's to be a follow-up article that tac...
Posted by chirpy on 21/04/2008 - 17:29
Megapixel theory
I tried to explain it in this thread https://www.pentaxuser.com/forum/viewtopic.php?t=7487&highlight=photons and I'm too lazy to type it out again ;) hope it helps. that discussion was about sensor size, but if you keep the physical size the same and increase the number of pixels the sa...
Posted by Mongoose on 21/04/2008 - 17:31
Ultra Violet sensitivity
Does anyone have any information Re: the sensitivity of the sensor used by Pentax to UV?? I have searched 2 forums and the net. All I have so far is on the following site http://www.dpfwiw.com/filters.htm#uv There is nothing specific to the pentax sensor which I believe is manufactured by Son...
Posted by Hamdala on 29/04/2008 - 00:32
Ultra Violet sensitivity
Yes thanks Pete, I have a *istD and a K100D - I think they both have the same sony sensor. In the absence of much info on the web, I have been considering doing just as you suggested. We have a large plateau in the central South Island surrounded by mountains up to 10,000 ft.. Only a 3 hour drive...
Posted by Hamdala on 01/05/2008 - 22:05
The near future.....perhaps
After using medium and large fromat systems for so many years I have always been frustrated by the lack of inovation in DSLR models which are essentially Luigi Colani's Canon prototype 'black plastic blob' from 1972(?) with a sensor thrown inside. It seems incredible that the last thirty plus years...
Posted by viewfinder on 07/05/2008 - 10:48
Don't click here if you don't like UV filters on your lenses
Kodak Lens Cleaning Fluid. Use sparingly. It will remove all traces of grease and contamination, but not the coating!
Posted by johnriley on 20/05/2008 - 05:49
Don't click here if you don't like UV filters on your lenses
...or possibly the Eclips fluid used for sensor cleaning - the original version (ok for *istD ect, but not K10D) is also ok for lens cleaning Andy
Posted by alfpics on 20/05/2008 - 08:32
Don't click here if you don't like UV filters on your lenses
I use Eclipse and PecPads for cleaning. Just don't ever, ever, EVER hit or drop the Pro1 filters. They splinter into a million razor sharp (front element cutting) pieces :shock: ;) Matt
Posted by MattMatic on 20/05/2008 - 08:45
Don't click here if you don't like UV filters on your lenses
I use Eclipse and PecPads for cleaning. Just don't ever, ever, EVER hit or drop the Pro1 filters. They splinter into a million razor sharp (front element cutting) pieces :shock: ;) Matt I remember you said that - I'm really careful, actually (honest, guv - I know I talk as if I'm a bit lax, but ...
Posted by ChrisA on 20/05/2008 - 09:56
Don't click here if you don't like UV filters on your lenses
Breathe on the filter and wipe with a clean microfibre cloth. That should get 99% off the stuff off. Other methods may remove a further 0.9%. Even when using high-quality cleaning fluids, I don't believe 100% of contamination can ever be removed by a mere mortal. Examine with a bright white LE...
Posted by iceblinker on 20/05/2008 - 10:28
Don't click here if you don't like UV filters on your lenses
I use Eclipse and PecPads for cleaning. Well, so do I now. Ordered two nights ago, shipped yesterday, received today, from LoobyLin's. Perfectly clean front end now (with lens cap on.. ;)) Thanks for the other suggestions folks (couldn't easily find a supplier of the Kodak fluid - where d...
Posted by ChrisA on 22/05/2008 - 11:33
Grey Card
didn't pentax used to sell a microfiber cleaning cloth that was a near perfect shade of grey?
Posted by Don on 07/06/2008 - 13:15
Wake up Pentax/Samsung!!!
The burst mode on the K20D simply opens the shutter and turns the sensor off and on. Infact it could use the live view sensor but I'm not sure on that. Either way, next gen they could make it 25FPS and 3mp with a bit of work.
Posted by ikillrocknroll on 08/06/2008 - 21:26
Wake up Pentax/Samsung!!!
The burst mode on the K20D simply opens the shutter and turns the sensor off and on. Infact it could use the live view sensor but I'm not sure on that. Either way, next gen they could make it 25FPS and 3mp with a bit of work. The K20D doesn't have a seperate liveview sensor or does it?
Posted by golfdiesel on 10/06/2008 - 08:08
Wake up Pentax/Samsung!!!
The K20D doesn't have a seperate liveview sensor or does it? No. Pentax said live view became possible because of the lower power consumption of the CMOS sensor. (There are probably other factors too though). Matt
Posted by MattMatic on 10/06/2008 - 08:51
Expected lifetime of a digital camera...
As the mirror doesn't rise until you press the shutter, no light can reach the sensor until that point. Metering is done with a small cell using light bounced off the mirror. G
Posted by George Lazarette on 04/07/2008 - 22:21
