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11-10-2014, 12:50 PM   #1
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overheating during timelapse

wanted to make a timelapse in the night and found my original Q stopping after a few shots during the night with 10-30 seconds exposure....because of overheating ?

whats the longest exposure you did a timelapse with ?

11-10-2014, 03:01 PM   #2
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I found my Q did the same with 5 min intervals between shots during day time. It would just shut off without completing the schedule. Not sure if it was heat related though. I had the Pentax AC adapter hooked up, so it wasn't the battery dying.
I gave up and use the K-01 for TL.
11-10-2014, 04:46 PM   #3
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I think that cameras with a shutter are really not suited to TL... you just speed through its MTBF...
11-10-2014, 04:49 PM   #4
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I haven't done long exposure time lapse but I can see how it might overheat. I have had overheat warnings on video on warm days.
Most of my timelapse is during the day so exposures are short.

11-10-2014, 05:04 PM   #5
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In Arizona the camera heats up (pink thermometer) rather quickly in the summer just shooting stills. Other cameras K3, K5, Sony A6000 and NEX used at the same time do not overheat for me.
11-11-2014, 02:47 AM   #6
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QuoteOriginally posted by LensBeginner Quote
I think that cameras with a shutter are really not suited to TL... you just speed through its MTBF...
Que!?
11-11-2014, 02:55 AM   #7
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QuoteOriginally posted by Steve.Ledger Quote
Que!?
Sorry, "mean time between failures"...
I mean... a shutter life expectancy is about 100k shots, on the K-01 you even have two cycles per activation (close, open, close, open to restore live view), and then a single time lapse can very easily run into the thousands (let's say a 2' video: 25f/s * 60s/min * 2min = 3000 shots...)
If you also factor in double activations you get 6000, which is about 16% of the expected operative life of the camera...
...better use a shutter-less mirrorless or a cellphone for that, IMHO...
11-11-2014, 02:59 AM   #8
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The Q is mirrorless and shutterless. The shutters are in the lenses or the adapter K.

11-11-2014, 03:13 AM   #9
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QuoteOriginally posted by crewl1 Quote
The Q is mirrorless and shutterless. The shutters are in the lenses or the adapter K.
Yeah, was answering to Steve here (he said he used his K-01)...
11-11-2014, 03:16 AM   #10
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QuoteOriginally posted by LensBeginner Quote
Yeah, was answering to Steve here (he said he used his K-01)...
Oh sorry I just saw this thread was about the Q.
11-11-2014, 04:08 AM   #11
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QuoteOriginally posted by LensBeginner Quote
Sorry, "mean time between failures"...
I mean... a shutter life expectancy is about 100k shots, on the K-01 you even have two cycles per activation (close, open, close, open to restore live view), and then a single time lapse can very easily run into the thousands (let's say a 2' video: 25f/s * 60s/min * 2min = 3000 shots...)
If you also factor in double activations you get 6000, which is about 16% of the expected operative life of the camera...
...better use a shutter-less mirrorless or a cellphone for that, IMHO...
I'm very confused by your maths.
11-11-2014, 04:13 AM   #12
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nobody will know how long the shutter in the lens survives because it doesnt count the shots ... doh
11-11-2014, 04:27 AM   #13
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QuoteOriginally posted by Steve.Ledger Quote
I'm very confused by your maths.
25 frames per second, 60 seconds in a minute, two minutes.
You can treat units of measurements just like numbers, so you simplify min/min and s/s and the final result is expressed in frames (shots).

---------- Post added 11-11-14 at 12:28 PM ----------

QuoteOriginally posted by paranoia23 Quote
nobody will know how long the shutter in the lens survives because it doesnt count the shots ... doh
was talking about the K-01, there's no shutter in the lenses.
Were you refering to the aperture mechanism (the iris diaphragm)? or to the shutter in the Q lenses?
11-11-2014, 02:58 PM   #14
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QuoteOriginally posted by LensBeginner Quote
25 frames per second, 60 seconds in a minute, two minutes.
You can treat units of measurements just like numbers, so you simplify min/min and s/s and the final result is expressed in frames (shots).[COLOR="Silver"]
This is very wrong thinking, LB. Time Lapse photography does not shoot @ 25fps. It is usually compiled at 15fps in post, but time intervals between shots can be anything you like, usually more than one minute. Most of my TL's have had 3-5 minute intervals. You can should an entire day without placing any unusual wear on the shutter. 5min intervals = 12 shots per hour which is nothing at all. You can shoot many more photos than this in normal use.

In any case, this thread is about the Q. Apologies to the OP.,
11-11-2014, 03:05 PM   #15
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QuoteOriginally posted by Steve.Ledger Quote
This is very wrong thinking, LB. Time Lapse photography does not shoot @ 25fps. It is usually compiled at 15fps in post, but time intervals between shots can be anything you like, usually more than one minute. Most of my TL's have had 3-5 minute intervals. You can should an entire day without placing any unusual wear on the shutter. 5min intervals = 12 shots per hour which is nothing at all. You can shoot many more photos than this in normal use.
I was talking about 25fps in the final product because it's a fairly common framerate in PAL (what we use here in Europe).
A 2 minute video (not a 2' timelapse) - irrespective of the original time lapse interval - will have fps*60 frames per minute.

Taking a few examples from the forum:
https://www.pentaxforums.com/forums/75-video-pentax-hdslrs/269770-night-time-...ka-k-01-a.html
1800pictures, 1'08"

https://www.pentaxforums.com/forums/38-photographic-technique/275628-boston-l...-approach.html
This one I don't know, but it's about 2'37" long and is very smooth (it's professional made I believe).

Granted, you can go as low as 1fps, but I wouldn't like the result.
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