| Sign in: |
| Members log in here with your user name and password to access the your admin page and other special features. |
|
|
|
|
|| SportsShooter.com: Member Message Board
D100 Shutter MTF ?
Nic Hume, Photographer, Photo Editor
 |
Victoria | BC | Canada | Posted: 10:45 PM on 04.10.04 |
->> Just wondering if anyone has info on the MTF for the shutter mechanism on a D100 ? I've been told by more than one person that it's as low as 20 - 25 000 frames, but that seems just a BIT on the low side compared to most DSLR's.
I haven't had any luck digging this info up at dpreview, various nikon websites, or anywhere else I can think of.
Anyone know ? |
|
Micheal Hall, Photographer
|
Sacramento | CA | USA | Posted: 12:31 AM on 04.11.04 |
->> If it is like most of the advanced amature Nikon film bodies, I think it is actually about 15,000.
But I don't have any firm data on that. I believe Nikon has stopped publishing the MTBF values for their shutters.
~Micheal |
|
Shaun Stewart, Photographer, Student/Intern
|
Austin | TX | USA | Posted: 1:25 AM on 04.11.04 |
->> I don't know what the rating is, but my D100 has seen 70,000 frames without a single failure..
Are you serious, 15k? I put 15k photos on my D2H in the first two weeks. That's nuts. My D100 took a little bit longer, but gee, 20k frames is just breaking it in. ;-)
~Shaun |
|
Jeff Frings, Photographer
|
Milwaukee | WI | USA | Posted: 11:15 PM on 04.11.04 |
->> If my shutter fails after 15,000 shots, I should get a new one, because it will certainly be before one year or even six months passes.
That nubmer seems ridiculously low. |
|
Jacob Hannah, Student/Intern, Photographer
|
Rochester | NY | USA | Posted: 11:46 PM on 04.11.04 |
| ->> I think he probably meant to say 150,000. I know that both the 1d and D2H are tested to 150,000. I don't know about the D100 but it is definately more than 20 - 25,000 frames. |
|
James Escher, Photographer
|
Hempstead | NY | USA | Posted: 1:46 AM on 04.12.04 |
| ->> I've shot with a D100 ever since it came out and have taken at least 50-60,000 frames, if not more. Never had a problem with it (knock on wood!). |
|
Sam Santilli, Photographer
 |
Philippi | WV | USA | Posted: 9:12 AM on 04.12.04 |
| ->> Nic, about the same experience with my 2 D100's as above, with no shutter problems to date. Call your Nikon shop and have them call their rep to get an answer. I just got one of them back from Nikon, had to fix the roccker selector button on back of camera. Nikon service did that and a bunch of other stuff as well, all under warrenty, and it is working like a charm. I still reach for my D2h first. |
|
Oscar Reixa, Photographer
|
Vigo | Po | Spain | Posted: 9:19 AM on 04.12.04 |
| ->> Canon and Nikon only post those specs on their top cameras. 1D and D2H at 150.000 and the new Mark II at 200.000. |
|
Ian Elliott, Photographer
|
Junction City | OR | USA | Posted: 10:21 AM on 04.12.04 |
->> Nic,
The MTBF is not the expected life of a product such as a shutter. If the product is repairable then the MTBF can be used. If it is not repairable then other reliability indices can be uses such as MTTF (Mean Time To Failure). Since the MTBF is derived from an exponential distribution, the mean is not at the 50% point. The mean of an exponential distribution is actually 37%. This means that 37% of the distribution is below the mean and 63% is above the mean. This means that there is a 37% probability that the product will operate without failure for a time equal to or greater than the MTBF.
To use the MTBF we need not only the mean, but also a measure of the distribution variance, usually the Standard Deviation of the population. Additionally we also need to know the confidence that we want to report the probability to, we may choose 0.95 or 0.90 etc.
I do not believe Nikon (or anyone else) publishes these figures. To use MTBF you need more information. Remember it is only a reliability index, and should be used as such. That is not to say the shutter will last for that amount of actuations. You can only say that with x % confidence your shutter is expected not to fail (with 37% probability) before the stated MTBF. At this time you do not know either the the confidence interval used or even the Standard Deviation of the population.
Cheers....now back to taking pictures
Ian |
|
Nic Hume, Photographer, Photo Editor
|
Victoria | BC | Canada | Posted: 5:21 PM on 04.12.04 |
->> Ian,
Neat. I'm glad we have a statistician in our midst. :) I was really just looking for a ballpark idea of when I can expect to start having age and/or use related problems with my rig. From what people are saying, I think I've probably got a couple more frames to go. (Having just hit 20 000 or so by my estimates...)
The stats lesson was useful though (seriously) ...
--Nic |
|
Barry Parish, Photographer
|
Hershey | PA | USA | Posted: 10:30 PM on 04.12.04 |
| ->> I read it is 150K for F/D1/D2 series and 50K for all other "non-pro" Nikon bodies |
|
Return to --> Message Board Main Index
|