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DPChallenge Forums >> Current Challenge >> 30 Seconds...almost?
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 06/15/2006 02:37:48 PM · #1
So I've been taking a couple preliminary shots for 30 Seconds or More, and all of my shots that I take at '30 seconds' come out to 29.987 seconds in the EXIF...

Do you suppose thats close enough or would I actually get DQ'd for it? I think I'm going to end up using Bulb anyway, but just in case any insight would be wonderful!
 06/15/2006 02:44:28 PM · #2
It seems terribly pedantic, but this is a very firm rule, easy to follow.
Personally, I'd make sure it is 30 or over. Sometimes near enough just isn't good enough.
 06/15/2006 02:56:33 PM · #3
does tha camera time how long the shutter has been open and place the data in the exif when you use bulb? I've only used bulb a few times and never checked this.
 06/15/2006 02:59:35 PM · #4
Originally posted by LoudDog:
does tha camera time how long the shutter has been open and place the data in the exif when you use bulb? I've only used bulb a few times and never checked this.


According to a few posts in the other thread, yes. I've never checked either so I'm just passing along what I read.
 06/15/2006 03:03:30 PM · #5
Originally posted by Beetle:
It seems terribly pedantic, but this is a very firm rule, easy to follow.
Personally, I'd make sure it is 30 or over. Sometimes near enough just isn't good enough.


It sure does seem pedantic. A reading of 29.987 seconds is just a slight glitch in the camera. Clearly, the spirit of the challenge has been kept to.
 06/15/2006 03:06:18 PM · #6
Originally posted by mk:
Originally posted by LoudDog:
does tha camera time how long the shutter has been open and place the data in the exif when you use bulb? I've only used bulb a few times and never checked this.


According to a few posts in the other thread, yes. I've never checked either so I'm just passing along what I read.


My rebel does so I assume your XT does too. It only posts seconds though, so it'll come out with a nice big number depending on how long you leave it open.
 06/15/2006 03:06:46 PM · #7
Originally posted by posthumous:

It sure does seem pedantic. A reading of 29.987 seconds is just a slight glitch in the camera. Clearly, the spirit of the challenge has been kept to.

I totally agree, but then you have the problem of just WHERE to draw the line.
 06/15/2006 03:14:16 PM · #8
Well you are supposed to round up those minuscule numbers and doing that it is easily a 30 sec shot. This shot would not get a DQ vote from meâ€Â¦but then again I’m not SC.

Clint

06/15/2006 03:23:18 PM · #9
Originally posted by Beetle:
Originally posted by posthumous:

It sure does seem pedantic. A reading of 29.987 seconds is just a slight glitch in the camera. Clearly, the spirit of the challenge has been kept to.

I totally agree, but then you have the problem of just WHERE to draw the line.


As Clint pointed out anything that mathematically rounds up to 30 seconds or more is where the line should be drawn. But of course someone will naturally balk at this.
 06/15/2006 03:33:04 PM · #10
Personally, I think that all entries require a very precise validation method as follows;

- Extract the timing chip circuitry from each camera
- Submit it via post to the SC
- Hook up the timing circuitry to an oscilloscope
- Obtain a sample of Caesium-133 cooled to 0 K
- Measure the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state (this corresponds to one second)
- Compare this to the 'one second' measurement provided by the camera timing chip
06/15/2006 03:34:24 PM · #11
Originally posted by jhonan:
Personally, I think that all entries require a very precise validation method as follows;

- Extract the timing chip circuitry from each camera
- Submit it via post to the SC
- Hook up the timing circuitry to an oscilloscope
- Obtain a sample of Caesium-133 cooled to 0 K
- Measure the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state (this corresponds to one second)
- Compare this to the 'one second' measurement provided by the camera timing chip

Hey, you are not supposed to disclose our validation methods!
 06/15/2006 03:37:17 PM · #12
If you got DQ'd for 29.987 seconds, I'd hurl...

We all learned in math that you would round up, so I'd be nice enough (were I SC) to give you all the way down to 29.5 seconds. Man, I'm a sweet guy.

here's a question, does the EXIF data have both "Shutter setting" or something and "exposure"? If you were set on 30seconds and the camera happend to take a 29.987 second shot, how is this your fault?

Message edited by author 2006-06-15 15:39:15.
 06/15/2006 11:14:49 PM · #13
So it seems the general consensus is that it would just be rounded up but are there any SC out there who would confirm that? Or would I just have to submit it and see where it gets me?
 06/15/2006 11:21:16 PM · #14
Originally posted by bfox2:
So it seems the general consensus is that it would just be rounded up but are there any SC out there who would confirm that? Or would I just have to submit it and see where it gets me?
We can't confirm it because (AFAIK) we haven't discussed it. Maybe one of you should submit the question via the Ticket system.
 06/15/2006 11:25:06 PM · #15
Originally posted by GeneralE:
Originally posted by bfox2:
So it seems the general consensus is that it would just be rounded up but are there any SC out there who would confirm that? Or would I just have to submit it and see where it gets me?
We can't confirm it because (AFAIK) we haven't discussed it. Maybe one of you should submit the question via the Ticket system.


Oo now thats a sneaky idea. I'll do it!
 06/15/2006 11:34:41 PM · #16
Originally posted by GeneralE:
Originally posted by bfox2:
So it seems the general consensus is that it would just be rounded up but are there any SC out there who would confirm that? Or would I just have to submit it and see where it gets me?
We can't confirm it because (AFAIK) we haven't discussed it. Maybe one of you should submit the question via the Ticket system.


Maybe you could bring it up to the other SC?
 06/15/2006 11:42:47 PM · #17
Originally posted by mk:
Maybe you could bring it up to the other SC?

I could, but I'm tired and lazy, so I like to let other people volunteer as often as practicable ...
 06/16/2006 12:10:36 AM · #18
Originally posted by Beetle:

Personally, I'd make sure it is 30 or over. Sometimes near enough just isn't good enough.


Sometimes near enough may be as good as it gets. Many PnS cameras do not have a bulb setting and have a slowest shutter speed of 30s, which may get reported in the EXIF as 29.987s. Should all of those people get DQ'ed or should they just not bother with this challenge?
 06/16/2006 12:12:16 AM · #19
Forgive me for preferring to err on the safe side.
 06/16/2006 12:15:06 AM · #20
I'd like to know too...

And I'm an advocate for following the rules...I'd be the first to cry foul, and I don't think someone should get DQ'd for the exif reading 29.9 seconds...

I'm gonna submit a ticket.
 06/16/2006 12:16:21 AM · #21
No forgiveness required, you did not actually err. :)

I would also like to hear from Langdon on the issue... I'm expecting to use 30 seconds instead of bulb mode tonight.
 06/16/2006 12:29:21 AM · #22
Originally posted by Spazmo99:
Originally posted by Beetle:

Personally, I'd make sure it is 30 or over. Sometimes near enough just isn't good enough.


Should all of those people get DQ'ed or should they just not bother with this challenge?


I'd vote for the later, just don't bother with it LOL. .013s is a lot of time :p
 06/16/2006 12:56:38 AM · #23
29.999999999 is still LESS than 30 seconds.
So it's definately a DQ :p
 06/16/2006 02:03:49 AM · #24
Originally posted by crayon:
29.999999999 is still LESS than 30 seconds.
So it's definately a DQ :p


Unless it's a shot of someone you can ogle? ;)
 06/16/2006 02:05:07 AM · #25
As far as I can see, my Canon S2 IS cannot do more than 15 seconds ... anyone know if I need to do something speciel to go to 30 seconds (yeah, buy a "real" camera ... haha!)
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