Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-15-2015, 04:34 PM - 1 Like   #16
Pentaxian




Join Date: Oct 2009
Location: Far North Qld
Posts: 3,294
We can't discuss 'seconds' in the same context. I seriously doubt 2nds even exist considering modern manufacturing and assembly standards (especially from Pentax). If they do they'd never get out for general sale. Then even if they did, well you'd take you chances like any other '2nd'. But you certainly should not make a generalized statement on a Pentax forum that the K-50 has 'zero seals on the bottom'.. Especially as you have not provided any proof this is true.

12-27-2015, 08:59 AM   #17
New Member




Join Date: Dec 2015
Posts: 5
Sensor dirt...how can come in?

Hello everybody,
i have a question.
How is it possible to have dirt (hair mosty 6-8 pieces) on my sensor (really destroyed pics), since i never change lens (i don't have 2nd) and since my k-50 (body & lens) is weather shield meaning that it is almost impermeable even from water?
George/Greece
12-27-2015, 09:16 AM   #18
New Member




Join Date: Dec 2015
Posts: 5
Attached Images
View Picture EXIF
PENTAX K-50  Photo 
12-27-2015, 10:50 AM   #19
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,864
QuoteOriginally posted by georgethess Quote
How is it possible to have dirt (hair mosty 6-8 pieces) on my sensor (really destroyed pics)
Some kits are sold with a regular lens, not a WR version. So make sure you actually have a WR lens.
Next, zoom lenses work like a pump and pull air back and forth through the camera. The mirror also moves and pushes things around. I think the main weakpoint of the WR on that camera is actually the viewfinder? Anyway, different parts move air and particles around. And the digital sensor is static, so it attracts some particles.
I suggest you get a rocket blower and clean the sensor. There are plenty of threads and posts about this, and it should solve your problem fairly well. There are other tools for sensor cleaning if you want. You can even take it to a shop to have it serviced. Rocket blower should be enough. Never touch the sensor with hand or vice, and be super careful if you use a fluid cleaner. And don't mix fluid cleaners from different brands, I was told they can react with each other.
Also, there is an in-camera option that shakes the sensor and cleans it a little. You can set this up so it does it automatically every time you turn on or off the camera. I think its a good idea to have this on, but it might be too late when there is so many particles already.

That said - this happens to ALL large-sensor digital cameras of all brands. Dust, hair,.. it is unavoidable on any DSLR and mirrorless cameras.
Note that hair is actually very very fine and might get sucked into places where a water droplet could not penetrate, because water has a certain surface tension. The WR would probably fail if you submerge the camera or if you pour it with steam. Once the force of the water becomes stronger than the force keeping it out, it will go in.

12-27-2015, 11:05 AM   #20
New Member




Join Date: Dec 2015
Posts: 5
QuoteOriginally posted by Na Horuk Quote
Some kits are sold with a regular lens, not a WR version. So make sure you actually have a WR lens.
Next, zoom lenses work like a pump and pull air back and forth through the camera. The mirror also moves and pushes things around. I think the main weakpoint of the WR on that camera is actually the viewfinder? Anyway, different parts move air and particles around. And the digital sensor is static, so it attracts some particles.
I suggest you get a rocket blower and clean the sensor. There are plenty of threads and posts about this, and it should solve your problem fairly well. There are other tools for sensor cleaning if you want. You can even take it to a shop to have it serviced. Rocket blower should be enough. Never touch the sensor with hand or vice, and be super careful if you use a fluid cleaner. And don't mix fluid cleaners from different brands, I was told they can react with each other.
Also, there is an in-camera option that shakes the sensor and cleans it a little. You can set this up so it does it automatically every time you turn on or off the camera. I think its a good idea to have this on, but it might be too late when there is so many particles already.

That said - this happens to ALL large-sensor digital cameras of all brands. Dust, hair,.. it is unavoidable on any DSLR and mirrorless cameras.
Note that hair is actually very very fine and might get sucked into places where a water droplet could not penetrate, because water has a certain surface tension. The WR would probably fail if you submerge the camera or if you pour it with steam. Once the force of the water becomes stronger than the force keeping it out, it will go in.
thanks for the reply.
my lens is WR 18-55 and is weather shield.
I have been informed about how to clean my sensor. I have also bought a rocket blower. But for this time i gave my cam to a professional store to clean it for me.
I just posed this post just to take an answer about "how is it possible..." and you answered very well. Thanks

ps. the only part of the camera i usually open is the Battery cover to charge it, and rarely the USB connector. But i don't think these departments communicate with the sensor room!
12-27-2015, 11:44 AM   #21
Site Supporter
patrick9's Avatar

Join Date: Feb 2011
Location: Murfreesboro Tennessee
Photos: Gallery | Albums
Posts: 3,353
QuoteOriginally posted by georgethess Quote
really destroyed pics)
Those are easy enough to clean up in Post processing. Reminds me I need to go blow my sensor off. I had a speck in my last couple of shots as well. I would wonder if you have a WR lens. Some were sold without the WR lenses. Also It could be possible for dust to enter when changing batteries or SD cards.
12-27-2015, 01:58 PM   #22
New Member




Join Date: Dec 2015
Posts: 5
Attached Images
 
12-27-2015, 04:20 PM   #23
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 9,021
If the lens changes length when focusing or zooming, it sucks in water or particles.

The DA*50-135 and AFAIK 60-250 don't, but you pay extra!

12-27-2015, 04:41 PM   #24
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,864
QuoteOriginally posted by georgethess Quote
I just posed this post just to take an answer about "how is it possible..." and you answered very well. Thanks

One test some people do is to sit in a quiet, calm room. Then move close to the viewfinder and other little gaps, and zoom or focus the lens. You can sometimes feel a small breeze coming in or out of the seams/gaps. Really depends on things like lens design and pressure/temperature difference between inside and outside of camera.
There were some threads about this stuff long ago, with people wondering if this is a bug or just unavoidable. I guess you got to deal with what you got
12-27-2015, 04:53 PM   #25
Pentaxian
bertwert's Avatar

Join Date: Jun 2015
Location: Golden, BC
Photos: Albums
Posts: 5,481
QuoteOriginally posted by clackers Quote
The DA*50-135 and AFAIK 60-250 don't
I think they do, they are internal focus but not internal zoom.
12-27-2015, 05:52 PM   #26
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 9,021
QuoteOriginally posted by bertwert Quote
I think they do, they are internal focus but not internal zoom.
My 50-135 is definitely internal zoom *and* parfocal. :-)

Gorgeous pics - got mine cheap from someone who noticed its SDM was playing up.
12-27-2015, 05:56 PM   #27
Pentaxian
bertwert's Avatar

Join Date: Jun 2015
Location: Golden, BC
Photos: Albums
Posts: 5,481
QuoteOriginally posted by clackers Quote
My 50-135 is definitely internal zoom *and* parfocal. :-)
Ok you're right, I just googled around.
I think that is the only WR pentax zoom lens that is. 60-250 definitely isn't.
12-27-2015, 06:10 PM   #28
Site Supporter
ramseybuckeye's Avatar

Join Date: Apr 2009
Location: Elida, Ohio
Photos: Gallery | Albums
Posts: 8,622
QuoteOriginally posted by flugfiske Quote
I've been little skeptic about the weather sealing in dslr:s. But my worries seem to be pointless, as this picture proves...
I was shooting some offroad driving on 21.11-15, and my camera got it share of mud and water, but after I wiped it with moist cloth it looked like new again. Even the lens did not get any damage.
My K-50 and K-30 have both been in heavy rains and heavy wet snows (with DA18-135WR and DA300*) and have come out much better than I have.
12-27-2015, 07:58 PM   #29
Pentaxian




Join Date: Oct 2009
Location: Far North Qld
Posts: 3,294
QuoteOriginally posted by georgethess Quote
How is it possible to have dirt (hair mosty 6-8 pieces) on my sensor (really destroyed pics), since i never change lens (i don't have 2nd) and since my k-50 (body & lens) is weather shield meaning that it is almost impermeable even from water?
Did your camera come brand new in the box with the lens fitted? No, there's always time for dust to get in especialy if you are new to ICL cameras and initially popped off the body cover to fit the lens in a dusty/breezy environment without realizing how easy it is for dust to get inside a DSLR.

QuoteQuote:
is weather shield meaning that it is almost impermeable even from water?
No. WR = Weather Resistant. Not Water Proof.
12-28-2015, 01:04 AM   #30
New Member




Join Date: Dec 2015
Posts: 5
QuoteOriginally posted by Steve.Ledger Quote
Did your camera come brand new in the box with the lens fitted? No, there's always time for dust to get in especialy if you are new to ICL cameras and initially popped off the body cover to fit the lens in a dusty/breezy environment without realizing how easy it is for dust to get inside a DSLR.


No. WR = Weather Resistant. Not Water Proof.
Yes, it was brand new and fully packed. I was super fast and careful when i initially attached the lens (18months ago. dust appeared 1 month ago during vacation). Since then, i never unplugged it.
Whatever means WR, i don't plan to make k50 underwater cam.

my issue is why so much dust came inside the sensor room.
Thanks for the reply
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
k-30, k-50, k-50 weather, pentax k30, pentax k50, weather
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K-30 flash and weather sealing ubjy Pentax K-30 & K-50 12 09-27-2015 04:42 AM
K-5 ii weather resistant sealing failure? yogomo Pentax DSLR Discussion 9 06-27-2013 01:51 PM
Weather sealing failed on my new K-5 kiwibird Pentax K-5 67 04-30-2012 09:14 AM
DA* 16-50 Weather sealing? AussieTrev Pentax SLR Lens Discussion 10 01-05-2011 06:16 PM
weather sealing manual K or M series lenses Naturefreak Troubleshooting and Beginner Help 20 11-29-2010 02:03 AM



All times are GMT -7. The time now is 02:26 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top