Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-02-2012, 02:46 PM   #16
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
QuoteOriginally posted by Docrwm Quote
Its not merely pressure that makes the fail. Movement over time can weaken them. Poor design can cause them to wrinkle or pinch thereby allowing water ingress. Decay over time due to exposure to solvents (like alcohol, soap - yes, simple soap, and salt water) and even simple exposure to UV and Oxygen can render them inoperable. Fewer moving parts for Pentax is a design plus straight out of the gate for WR. More gaskets is also a plus. Quality is certainly a factor but so are the other factors (and more) that I listed above.
Very good info - thanks, I didn't think about movement at all.

03-02-2012, 03:44 PM   #17
Pentaxian
amoringello's Avatar

Join Date: May 2008
Location: Virginia, USA
Photos: Gallery
Posts: 1,429
QuoteOriginally posted by DragonLord Quote
There is something to note about this: the K-7 and K-5 have 77 seals, while the EOS-1D X has 76 seals—yet the K-7 and K-5 have fewer control points than any EOS-1 series camera. The D-BG4 battery grip adds an additional 43 seals.

Can this mean that PENTAX weather sealing is better than even a Canon EOS-1 series camera?

--DragonLord
Lets say you have a simple cube with with 12 edges. Now add split one side in half, you have 13 edges.
Is the box with 13 edges and 13 seals more resistant than the one with 12 edges and 12 seals?

Without knowing how many places on each camera would be in need of seals and how those seals are designed, it is impossible to determine reliability merely on their count alone.
03-02-2012, 04:37 PM   #18
Veteran Member
liukaitc's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,008
one question, is DA* lens better sealed than DA WR lens?
03-02-2012, 04:50 PM   #19
Loyal Site Supporter
bwDraco's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,015
Original Poster
QuoteOriginally posted by liukaitc Quote
one question, is DA* lens better sealed than DA WR lens?
Yes. DA* lenses are fully sealed, but PENTAX refers to DA WR lenses as having a "simplified weather-resistant construction" (see page 7 of the DA lens manual).

--DragonLord

03-02-2012, 05:12 PM   #20
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,829
It would be nice if Pentax/Canon/Nikon stated the JIS/IEC weatherproofing grades their DSLR's met. Maybe they do, somewhere.

Dust ingress protection
Grade 4
Protected against solid foreign objects 1,0 mm diameter and greater.

Grade 5
Dust protected. Ingress of duct is not totally prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the apparatus or to impair safety.

Grade 6
Dust tight. No ingress of dust.

Degrees of protection against ingress of water indicated by the second characteristic numeral

Grade 0
Non-protected

Grade 1
Protected against vertically falling water drops.
Vertically falling drops shall have no harmful effects.

Grade 2
Protected against vertically falling water drops when enclosure is tilted up to 15 degrees.
Vertically falling drops shall have no harmful effects when the enclosure is tilted at any angle up to 15 degrees on either side of the vertical.

Grade 3
Protected against spraying water.
Water sprayed at an angle up to 60 degrees on either side of vertical shall have no harmful effects.

Grade 4
Protected against splashing water.
Water splashed against the enclosure from any direction shall have no harmful effects.

Grade 5
Protected against water jets.
Water projected in jets against the enclosure from any direction shall have no harmful effects.

Grade 6
Protected against powerful water jets.
Water projected in powerful jets against the enclosure from any direction shall have no harmful effects.

Grade 7
Protected against the effects of temporary immersion in water.
Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed in water under standardized conditions of pressure and time.

Grade 8
Protected against the effects of continuous immersion in water.
Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under conditions which shall be agreed between manufacturer and user but which are more severe than for numeral 7.

As a guide, the tough little Ricoh G700SE's water resistance is rated at JIS/IEC waterproof protection grade 8 so the G700SE can handle two hours of underwater photography at a depth of 5 m. Dust resistance, at JIS/IEC dustproof protection grade 6, guards against infiltration by dust and sand.

The Pentax Optio WG-2 also has underwater performance in depths up to 40 feet (from 30 feet) for up to two hours of continuous operation (equivalent to IPX8 or JIS Class 8 waterproof performance).

I doubt the K-5 is in the same league as the G700SE or Optio WG-2, but I would hazard a guess and say with a WR lens on it a K-5 might get to Grade 6 on dust ingress protection and Grade 4 on water ingress protection, perhaps even Grade 5 (judging from some of the videos of the K-5 being either repeatedly placed in a shower or washed down with a hose).
03-02-2012, 08:48 PM   #21
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
It's weather resistant WR, not water proof,This mean it's good to use outside not underwatewer
03-03-2012, 02:03 AM   #22
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,829
QuoteOriginally posted by bobmaxja Quote
It's weather resistant WR, not water proof,
I agree. JIS/IEC water ingress, Grade 4 seems about the limit of what I would be confident about with something like the K-5 and 18-55 WR combo.
03-03-2012, 08:07 PM   #23
Senior Member
jremick's Avatar

Join Date: Mar 2010
Location: Melbourne
Photos: Gallery
Posts: 141
Well, like everyone else in this thread so far, I can't answer your question either. However, I can say that the abuse my K-5 has survived has given me far more faith in its weather sealing than I really need. Short of liquid submersion, I will most likely give up before the K-5 does.

I've taken mine into torrential rain for hours and day-long hikes in the rain, through sand, dirt and dust, paintballing, snowshoeing, high heat, etc. During all of this abuse I didn't hide the camera in a bag or under my jacket, it was out and ready for use at all times, exposed.

The few people I've shot with that owned Canon, Nikon or otherwise don't put their cameras through this for one reason or another. Maybe I'm just crazy, or maybe I just trust that my K-5 is built well.

07-19-2012, 04:40 AM   #24
Banned




Join Date: Mar 2012
Location: Charleston & Pittsburgh
Photos: Albums
Posts: 1,683
QuoteOriginally posted by jremick Quote
The few people I've shot with that owned Canon, Nikon or otherwise don't put their cameras through this for one reason or another. Maybe I'm just crazy, or maybe I just trust that my K-5 is built well

In terms of WR... The new K30 probably has the best WR of any slr on the market. The K30 can hold class 4 indefinately and almost borders upon a class 5. The degree of WR followed not too far behnd by the K5.

Then there are the competetors... Items like the Canon 5d (different variations) don't fair very well in real world WR; and in that realworld I've seen Canon 5d's literally "totaled beyond repair" in items such as stage 2's. The new Canon X model and also itemslike the Nikon D4 should fair quite well
07-19-2012, 08:53 AM   #25
Senior Member




Join Date: Mar 2012
Location: London Ontario
Posts: 131
I dropped mine into a pond fora few seconds and it still works.
07-19-2012, 09:08 AM   #26
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
QuoteOriginally posted by coreyhkh Quote
I dropped mine into a pond fora few seconds and it still works.
Good to know, horrifying to hear
07-19-2012, 09:27 AM   #27
Pentaxian
kh1234567890's Avatar

Join Date: Sep 2010
Location: Manchester, UK
Photos: Gallery
Posts: 2,406
QuoteOriginally posted by rawr Quote
I doubt the K-5 is in the same league as the G700SE or Optio WG-2, but I would hazard a guess and say with a WR lens on it a K-5 might get to Grade 6 on dust ingress protection and Grade 4 on water ingress protection, perhaps even Grade 5 (judging from some of the videos of the K-5 being either repeatedly placed in a shower or washed down with a hose).
I doubt it. IP54 maybe. IPx4 being essentially 3 minutes under a 12.5 l/min shower head. IPx5 is 3 minutes under a 1/4" nozzle at the same flow rate. IP6x is no dust ingress whatever after 8 hours in a cloud of talcum powder.

Last edited by kh1234567890; 07-19-2012 at 09:35 AM.
07-20-2012, 07:27 AM   #28
Site Supporter
royal07's Avatar

Join Date: Jan 2009
Location: Tallahassee, Florida
Photos: Albums
Posts: 17
Take a look at this link:
07-20-2012, 08:20 PM   #29
Loyal Site Supporter
bwDraco's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,015
Original Poster
See https://www.pentaxforums.com/forums/pentax-dslr-discussion/191841-pentax-dust...ghanistan.html.

--DragonLord
07-23-2012, 07:56 AM   #30
Veteran Member




Join Date: Dec 2010
Location: Manila
Photos: Gallery | Albums
Posts: 2,190
One thing I noticed about all "Pentax WR success stories" posted on YouTube is that some Canon fan will always link up DigitalRevTV's "torture test" for the Canon 7D...

..lots of shock...strong water...immersion...even FIRE... and the thing "still works".
I think we love our cams too much to subject it to such abominable procedures... which won't really happen by a large margin in "real life"
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!
7d, camera, compare, dslr, lenses, pentax, pentax weather, photography, weather
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
weather sealing RonHendriks1966 Pentax K-5 69 03-03-2012 10:09 PM
DA* 16-50 Weather sealing? AussieTrev Pentax SLR Lens Discussion 10 01-05-2011 06:16 PM
weather sealing houstonmacgregor Pentax SLR Lens Discussion 3 07-02-2010 03:00 PM
Weather Sealing Effectiveness smcook99 Pentax SLR Lens Discussion 34 04-14-2010 03:32 PM
Pentax DA* weather sealing. How good is it? yeedub Pentax SLR Lens Discussion 8 02-18-2008 03:53 AM



All times are GMT -7. The time now is 07:52 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