Night photos of vehicles while out at Death Valley

nckwltn

Explorer
This is a side thread from http://www.expeditionportal.com/forum/threads/118903-Death-Valley-Weekend-Nov-8-10-2013, someone asked what I used for these three night shots. Instead of hijacking my own adventure story thread, I figured I would start up something over here.

What camera are you using for your night shots? I've had a challenging time getting good astrophotos. I do like to just wash the objects in the foreground with my headlamp. I feel the flash is too strong.

All of the photos from me were shot on a Canon 5DM2 with the F4.0 24-105L.

The night pictures in particular I cranked the aperture down pretty far, something like 7.1-8.0 or so. I also bumped the ISO somewhere in the 2000 range. Because I don't have a shutter bulb, I can't hold the shutter open forever, so I had to use the camera's maximum time of 30 seconds.

The photos were REALLY noisy, but my wife was able to cut out the noise a bit using Lightroom, and then take down the red, which is what most of visible noise was. So some of the stars in the sky are really bits of noise that just now look like stars.

The flash was a 580 EX2 at 1/16th or 1/32nd power. I fired the flash about 8-10 times in each photo, from about 10 feet out. The key thing with the flash is to fire it at 45 degree angles from the lens. With this type of manual firing, just be sure to always keep moving around, and fire the flash back into the area you were previously blocking as you're moving around.

I also try not to light up the ground too much, so this usually means pointing the flash upward a little.

The first thing I do for these is to expose for the available light. Thankfully the moonlight on the hills behind the trucks was quite bright. Then, keep trying the flash for a few frames until I found a power and amount of strobing that worked. You can always fire the flash 10x at 1/32 power to get the same illumination power as 5x at 1/16th power. Generally though, I usually like more strobing at a lower power as opposed to fewer strobes at a higher power. The shadow's you see behind the vehicles is mostly caused by the moonlight. Probably the most pronounced behind the LR3.






 
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ETAV8R

Founder of D.E.R.P.
Thanks for the breakdown. Nice camera. I have a 5D but am wanting a 6D. Any idea of the process to reduce noise in LR? I have LR2. I've done some night shots in unique places and the noise has made the photos crappy.
 

chadlanc

Adventurer
with a lens of a max of f4 on a 5d2 you'd need to go to at least iso 3200. If you don't have a shutter release cable you can always set a timer of a couple seconds before the exposure.
 

nckwltn

Explorer
Thanks for the breakdown. Nice camera. I have a 5D but am wanting a 6D. Any idea of the process to reduce noise in LR? I have LR2. I've done some night shots in unique places and the noise has made the photos crappy.

I'm pretty sure LR has some noise reduction things built in (at least in the newer versions). Even at a lower ISO, with the shutter open for a long time, you'll still get some noise. In this case, the noise was a lot of red dots, so lowering the red saturation (or redness) of the photo took those out, and made them look like stars in the sky. Also, the image on flickr isn't 1:1, so the cropped down versions end up with less noise as well.

going B/W can also hide some noise. B/W can make the photo have an aged feel, where you may naturally expect noise.

the best thing to do though is try a lot of things... low ISO with longer shutters, slowly increasing the ISO until you get to a point where it is no longer an acceptable image. Then you know the limits. Each iteration of the 5D camera has had improved high iso. I'm sure the 6D will out shine your 5D in most ISO noise regards.
 

nckwltn

Explorer
with a lens of a max of f4 on a 5d2 you'd need to go to at least iso 3200. If you don't have a shutter release cable you can always set a timer of a couple seconds before the exposure.

My settings for the photo of the rig with the roof-top tent where 24mm F7.1 ISO 2000 30 second exposure (updating my original posting in a moment). I think I tried higher F numbers, but wasn't able to expose within the 30 seconds.

Even at 30 seconds some star trails are visible, but only slightly. I wanted to go with the higher aperture so that more would be actually be in focus with my focal length set at infinity.
 

ETAV8R

Founder of D.E.R.P.
I will suggest the Vello series of remotes instead of Canons. You can get one Vello controller and use it with a dedicated cord or go wireless. I have one and use it on both my G15 and 5D. Check them out.
 

Mad Matt

Adventurer
Thanks for the tips. I've had similar success using the strobe setting on my 250 lumen flashlight. I panned the strobe across the footprint of the image as much as was needed to light up the foreground. This was taken on a moonless night with my 17-40mm f/4L at 17mm, f/4, iso 4000 and a 15 sec exposure.


Stars over Colorado River near Moab, UT by blindranger, on Flickr
 

nckwltn

Explorer
Very nice shot! The strobe was enough to light up the cliff face? it looks like two different shots combined into one.
 

Mad Matt

Adventurer
Yep single shot. I was just messing around and was shocked that the light was powerful enough to fill in as well as it did.
 

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