65-Second Shutter-Speed, Test Images

Woodsman

11

« on: 28 / November / 2007, 11:11:31 »

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« Last Edit: 22 / April / 2008, 18:56:08 by Woodsman »

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schro

3

Re: 65-Second Shutter-Speed, Test Images

« Reply #1 on: 17 / December / 2007, 20:48:58 »

I got these two at a local historic site in my area. (with permission of course)
The first one is a 65 second exposure, and the second is ~40 seconds.
Both were taken around at ISO100 with NR turned on.

CRW_1401.jpg (112.32 kB, 1024x768 - viewed 874 times.)

Cobb-Front.jpg (127.18 kB, 1024x768 - viewed 923 times.)

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hailstorm

38
Canon S3 IS, Marumi 0.5 X Lens,Hoya CPL+CHDK

Re: 65-Second Shutter-Speed, Test Images

« Reply #2 on: 24 / December / 2007, 03:43:46 »

this one was taken from my house...at 2200 hrs at night..its amazing with 65 secs...ISO 80..used EXiftoolsGUI to nodify the exposure time

IMG_2874.jpg (206.55 kB, 800x600 - viewed 954 times.)
Model:Canon PowerShot S3 IS Exposure Time:65 seconds F Number:F/2.7 ISO Speed:80 Date Taken:2007:12:23 21:58:32 Metering Mode:Pattern Flash Mode: Focal Length:6 mm Color Space:sRGB

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Check this if u want

Flickr: kunalchak's Photostream

holeepassion

39

Re: 65-Second Shutter-Speed, Test Images

« Reply #3 on: 05 / January / 2008, 07:23:55 »

Quote from: Barney Fife on 17 / December / 2007, 22:24:20

Wonderful examples. Pretty amazing, isn't it?

Who knew that such low-noise, long-exposure images were locked away in these cameras. But I have found that I get even less noise with NR turned off, and then doing my own dark-frame subtraction. Not always convenient to do though. But it's worth keeping in mind if you really need the utmost out of that small sensor.

I grew up on film, so I have no problems accepting noisy/grainy ISO400 media (Ektachrome 400 anyone?). Even using ISO200 film at times was pushing it for acceptable grain. ISO400 was only used when no other methods would work. ISO800 film? Well, that was only for dire emergencies or when grain would add a nice special effect. So for me to find ways to use old techniques and attain the very same quality is no problem.

hi there .. wondering how you could do ur own dark frame subtraction

? thanks in advance

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holeepassion

39

Re: 65-Second Shutter-Speed, Test Images

« Reply #4 on: 07 / January / 2008, 20:18:11 »

Quote from: Woodsman on 07 / January / 2008, 11:16:01

Quote from: holeepassion on 05 / January / 2008, 07:23:55
hi there .. wondering how you could do ur own dark frame subtraction ? thanks in advance

This is mentioned several times on the Firmware Usage Page.

thanks for that .. just not sure what it does ... after reading still a little confused ... but i might come back later ... i might get it later what it does !!!

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Lead Head

4

Re: 65-Second Shutter-Speed, Test Images

« Reply #5 on: 16 / January / 2008, 21:53:13 »

I'm having some trouble with this, does firmware work on the S3 IS?

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wontolla

413
S3 & G9 & A720

Re: 65-Second Shutter-Speed, Test Images

« Reply #6 on: 17 / January / 2008, 08:55:31 »

Trouble with what?

Does CHDK works on the S3 IS? Yes it works

A little more infomation about your doubts could help

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Lead Head

4

Re: 65-Second Shutter-Speed, Test Images

« Reply #7 on: 17 / January / 2008, 17:07:56 »

I was having some trouble figuring out where to download the allbest build. But I got it installed and running. Just need to figure out what to do with hot pixels with 65 second exposures :-P

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chaynlynk

30

Re: 65-Second Shutter-Speed, Test Images

« Reply #8 on: 23 / January / 2008, 20:13:20 »

Quote from: hailstorm on 24 / December / 2007, 03:43:46

this one was taken from my house...at 2200 hrs at night..its amazing with 65 secs...ISO 80..used EXiftoolsGUI to nodify the exposure time

I did the same thing on my SD1000. It seems to be more like 60 seconds on mine though. They both are ISO 800.

The first one was taken on 1/22/2008 1:40 AM.
The second one was taken on 1/22/2008 7:31 PM.
Both were full moon situations.
It snowed that day and it was overcast on the second one.