Extended Exposure Photography - Creative Uses of CHDK - CHDK Forum
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Extended Exposure Photography

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Offline NightPhotoNoob

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Extended Exposure Photography
« on: 13 / December / 2011, 02:07:16 »
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Hello all!  I am new to this forum and I have been using the CHDK for a few months now, and over that time I have used several of its features to help improve my photography.  But before I elaborate on that I am going to explain how I came by the CHDK.

Sometime around September a friend of mine showed me some pictures he took using extended exposure.  He took some really amazing pictures, like this one:



After he explained to me the basics of how it worked I began taking some shots of my own.  But at the time I was rather unhappy with the limited features of my camera, for my friend has a Canon EOS Digital Rebel XS, where as I have an old hand-me-down Canon PowerShot A530.  But then my friend told me about the CHDK and how it could make my camera so much better.  So I installed it to my camera's SD card and began  messing around with it.  The first real shot I took using the CHDK was this:



This shot was taken at sometime between 9:00 PM and 10:00 PM (well after dark), with the shutter speed set for 2048 seconds via the CHDK.  It killed a brand new pair of batteries to take it, but I was rather pleased with the effect.  I have since taken many more shots of extended exposure photography without the use of the CHDK, such as these:













Another pic I used the CHDK for:



It's just the Sun, taken with the shutter speed set at 1/100,000" using the CHDK.

Currently I have been exploring deeper into the different features of the CHDK and I believe I will be able to use the motion detection script combined with some shutter speed adjustments to get some really interesting shots.  Once I finish my next photography project I will post some of the results.

To see more of my pictures, check out my flickr account here:

http://www.flickr.com/photos/71766005@N03/

Thanks for reading!
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Cameras: Canon EOS Rebel T3/1100D w/ 18-55mm lens kit
Canon PowerShot SX150 IS
Canon PowerShot A530
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Offline outslider

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Re: Extended Exposure Photography
« Reply #1 on: 13 / December / 2011, 02:27:04 »
I like your photos! Not all, but these with nice colors and symetric curves are quite nice;)

Quote
It's just the Sun, taken with the shutter speed set at 1/100,000" using the CHDK.

You must know, that even if CHDK sais 1/100,000" it doesn't have to be true. All cameras have some hardware limits (laws of physics). CHDK only tells the Canon firmware, how fast it should move a shutter, but if it's physically impossible you'll get the shorter possible shutter.

You can try to take a photo of the same scene with shutters such as 1/10,000; 1/25,000; 1/50,000; 1/100,000 and so on and check, when lower shutter gives you no changes to the photo. This way you can estimate a hardware limit of your camera. Camera has also limit for the long shutters, but it's rather Canon firmware based. For my sx130 the highest limit is around 1-2 hours (I don't really remember). I didn't estimate the lowest shutter.

I'm waiting for your next experiments!
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Offline NightPhotoNoob

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Re: Extended Exposure Photography
« Reply #2 on: 22 / December / 2011, 18:16:43 »
Thanks for the feedback!  My current goal is to try photographing the trajectory of an object using long exposure and a flashing strobe light to expose the object at many points as it moves.  Hopefully I will be able to use the strobe from the science department at my school, it can flash at up to 60Hz.  If I can I will definitely share some of the pics.

Once it gets warmer outside I intend on exploring some tunnels around my area and use them in my photography (tunnels make for some nice places to do light painting).

Also, this summer I would like to take some startrails, pending the completion of the SX150 IS CHDK. 
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Cameras: Canon EOS Rebel T3/1100D w/ 18-55mm lens kit
Canon PowerShot SX150 IS
Canon PowerShot A530
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Offline powershooter

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Re: Extended Exposure Photography
« Reply #3 on: 27 / December / 2011, 11:57:01 »
Wow I relay like that picture
Great job keep up the good work!
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Offline NightPhotoNoob

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Re: Extended Exposure Photography
« Reply #4 on: 03 / January / 2012, 22:19:02 »
A few of my latest pics:



Toss of the Christmas lights in my grandfather's basement.



Toss of the Christmas lights in my grandfather's basement, but I caught some of the window, which made for a cool effect.



New Years Eve, playing with sparklers out on my roof.



LED spins.



My attempt at an orb.  Not the best, but still looks ok.



Used my A530 as an external flash.
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Cameras: Canon EOS Rebel T3/1100D w/ 18-55mm lens kit
Canon PowerShot SX150 IS
Canon PowerShot A530
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Offline DeanTaylor77

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Re: Extended Exposure Photography
« Reply #5 on: 07 / January / 2012, 12:24:21 »

hello

Please explain how you managed these two shots. And, just what is it that is being photographed?

thanks

Dean Taylor





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Offline NightPhotoNoob

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Re: Extended Exposure Photography
« Reply #6 on: 07 / January / 2012, 14:01:42 »
Dean,

The first photo was one that my friend took.  What he did was he took a pane of glass and applied some Rainx to it, and then placed many single drops of water onto it.  Focusing in on the water droplets, he then placed christmas lights underneath the glass and moved them around as he took the picture.  I'm not sure what the shutter speed was set to in his photo, I would have to ask him.

The second picture was one that I took, and what I did was I took a strand of battery powered LED lights and placed them around the rim of a bicycle wheel.  I would roll the wheel past the camera as it was taking the shot. 

Below is a picture of my light painting tools, as of a few days ago.  It's not much, but it helps to show how these kinds of pictures can be taken.



Bike wheel on the left, below it two LED flashlights and a laser pointer, below those a few single LED lights.  To the right of those is my steel-wool spinning wires and some sparklers.  Some battery powered LED lights to the right of that, a homemade battery powered 6-light strand, and my PowerShot A530 that I use as an external flash.  And of course, the roll of duct tape I am permanently borrowing from my high school physics class.

Hope this helped to answer your question.
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Cameras: Canon EOS Rebel T3/1100D w/ 18-55mm lens kit
Canon PowerShot SX150 IS
Canon PowerShot A530
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Offline waterwingz

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Re: Extended Exposure Photography
« Reply #7 on: 07 / January / 2012, 14:05:57 »
Quote from: NightPhotoNoob on 07 / January / 2012, 14:01:42
Bike wheel on the left, below it two LED flashlights and a laser pointer, below those a few single LED lights.  To the right of those is my steel-wool spinning wires and some sparklers.  Some battery powered LED lights to the right of that, a homemade battery powered 6-light strand, and my PowerShot A530 that I use as an external flash.  And of course, the roll of duct tape I am permanently borrowing from my high school physics class.
Added to my list if "top rated" postings.
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Offline S95

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Extended Exposure Photography
« Reply #8 on: 08 / January / 2012, 16:51:41 »
S95 shoot at 1/100,000 shutter speed

Will post again
« Last Edit: 08 / January / 2012, 17:12:52 by S95 »
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Offline NightPhotoNoob

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Re: Extended Exposure Photography
« Reply #9 on: 08 / January / 2012, 17:03:30 »
@S95,

I can't view the photo you are trying to share.  You may have a bad link.  Perhaps you could try attaching a copy of the image to your post instead.

-NPN
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Cameras: Canon EOS Rebel T3/1100D w/ 18-55mm lens kit
Canon PowerShot SX150 IS
Canon PowerShot A530
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