Shooting Star Trails & painting With Light

Shooting Star Trails

Photographing Star trails is actually a relatively simple technique that can conjure up some wonderful eye catching images. As the earth rotates, the North Star will appear to remain fixed whilst the other stars appear to rotate around it. During long exposures we are able to record the motion of these stars in our images.

Planning plays a pivotal role in achieving successful star trail images. Before heading out I pay close attention to the weather forecast to ensure it’s going to be a clear night, I find websites such as Metcheck and Wunderground are particularly useful as they will give a cloud coverage breakdown for set times every three hours. Subject matter is a personal preference but I like to include subjects with a strong outline against the sky in my images such as a church, barn, lighthouse or windmill, by using a compass I can also work out which direction the North Star will appear and if possible include this in my images. Once I have found my location I try to set up my gear whilst it’s still light and make sure everything is in order. By arriving whilst it is still light it is much easier to focus and compose the image. I begin by setting up my tripod and composing and focusing the picture, a good solid tripod is essential here and its important to make sure that it’s on solid ground with no chance of moving during the long exposure. At this point I also like to check there is plenty of memory and fully charged batteries in the camera.

Its then a matter of waiting for it to get dark enough before I begin shooting, if I want to recompose an image or re focus in the dark then a large powerful torch is really useful. Its very difficult to see much through the viewfinder so once I think I have everything set up correctly I like to take a short test shot. To do this I select a high ISO setting on my camera, I then take a test shot of around one minute using the bulb facility and a cable release and examine the image on the LCD to check for distracting elements and to check the focus. At this point I also like to check the exposure is correct, the test shot is also a great way to gauge how long the main exposure will need.

A little bit of Maths is required here, but just remember that every time we increase or de-crease the exposure by one stop we are doubling or halving the amount of light coming into the camera. So if a an exposure of one minute is correct at ISO 1600 and we increase that exposure by one stop to ISO 800 then we are doubling the exposure time so the new exposure time would be two minutes, just keep doing this until you get to your chosen ISO and aperture settings to give you your final exposure time.

 Stacking Method Or One Long Exposure

To capture star trail images for the main image we have two options, the first is to shoot one long exposure and leave the shutter open during that time, the second process we can use is to shoot lots of shorter exposures and then combine these later using computer software. Both techniques have their advantages and disadvantages. If shooting lots of shorter exposures then exposure times of around 30 seconds work well here. Long exposures increase the amount of noise in the image so the shorter exposures of around 30 seconds stacked together will have less noise. The disadvantages of this technique are that you use more space on memory cards and hard drives, your post production work is increased and the major disadvantage is you have tiny gaps in the star trails. One of the real advantages of the stacking method though is the ability to remove images you don’t want stacked in the sequence such as a frame where a plane with lights has flown through the image or you can even remove a number of frames afterwards to dramatically reduce the exposure of the image. There are a number of software options available to combine the stacked images but one that I have found particularly good is a free piece of software available at www.Startrails.de.

Begin by composing your picture and making sure your tripod is on solid ground. I like to hand my bag from my tripod for extra stability. Composing can be a problematic in the dark so its best to take a test shot.

Set you camera to bulb mode, use a large aperture such as F4 and a High ISO speed then take a short test shot. Review the test shot and make sure you are happy with the composition.

So to begin shooting using the stacking method we need to set our camera to continuous drive mode, this means when we lock open our shutter when setting a sequence of 30 second exposures.Set your shutter speed to 30 seconds and select your chosen ISO and aperture settings, ISO 400 and F8 often work well.

We need to illuminate our subject with some light, I find a large torch gives off a nice warm light and offers you lots of control over what parts of the scene you illuminate. You can also use flash. I save this part of the process to the last five or six frames, this means if we over expose the areas we paint with the torch we can simply take a few of the last frames away.

For the final image of the day attach the lens cap to the camera and take a dark frame as the same settings, the stacking software can then use this to help reduce noise in the final image at the post production stage. All of the images will look very dark initially right out of the camera however this is perfectly normal.

To start the post production stage open up the star trails software, click file, Open images and then select all the frames minus the dark frame. Now select file, open and load in the dark frame. Now we have all our image ready simply click build and then star trails, we now need to wait a while and let the software do its stuff, when the image is completed simply click file and then save as and the image is complete.

 Star Trail Tips

Star trail images are always eye catching, but just like photographing images in the day we need to find a good subject and a good composition. Whilst pictures of a night sky alone will result in good star trails if there is no subject matter to the image then they will rarely work well. For stunning images try locating the North Star in your composition, as the earth rotates the other stars will appear to spin around it.

Clear skies are essential for photographing star trails so avoid nights when there is a chance or thick cloud blowing in during the long exposure.

Exposures for star trails can range from several minutes to several hours, the overall exposure length will depend on the amount of motion you wish to capture. One of the major problems with digital cameras during long exposures is there are power hungry, with this in mind I normally limit my exposures to less than 90 mins unless I am using a battery grip with the facility to hold more than one battery at a time.

To help aid with focusing in the dark shine a powerful torch on your chosen subject, once your camera gets a focus lock switch your lens to manual focus so that it doesn’t hunt when you press the shutter button.

Take a compass with you and work out the position of the North Star. As the Earth rotates the North Star will appear to stay fixed and the rest of the stars will appear to rotate around it.

It can get very cold at night particularly when standing around waiting for long exposures so warm clothing is essential.

Safety In Numbers

Night photography can be quite daunting, I like to photograph subjects in remote areas where you don’t attract as much attention. Strange noises & wildlife moving in the bushes can be quite spooky especially if you are on your own, but you soon get used to it. This does put a lot of photographers off from shooting night photography especially lone females. With this in mind I began offering one day workshops photographing at night in Norfolk, UK. I usually hold two or three one day Painting With Light & Star Trail photography workshops throughout the year, these are priced at just £50 and are offered on a first come first served basis. For more details on one day workshops offered in Norfolk, Suffolk, Essex & Derbyshire please visit the workshop section on my website at http://www.theuklandscape.com/Workshops.htm

Autumn Update

Well it’s Autumn already, this year really seems to have flown by. The summer has been really busy with both workshops and commercial work and I have really struggled to do much landscape photography for myself at all. Luckily I have now finished most of the commissions and it felt really good to get out and do a bit of landscape photography in October, now with the shorter winter days I am hoping to make the most of November and December over the coming weeks.

 I had a really good October workshop wise with some fantastic weather for once on both the Peak District and the three day boat workshop. I changed the format of both workshops slightly. For the boat workshop I decided not to head up to Berney Arms Mill, as much as I love this remote location in the previous years when ever we have headed there we have always had rotten weather. I decided to keep the travelling down which made it a much more relaxed weekend. We ended up with perfect conditions photography wise, nice clear nights for star trails, nice light throughout the days and some fantastic stormy sunrises for two mornings in a row. Even I grabbed a quick picture below whilst no one was looking.

 For the Peak District weekend workshop the following week it was again a slightly different format to last years, I made the decision to reduce the numbers on this one and stay in a cottage in the village of Tideswell. Using a cottage in Tideswell would mean we were in a fantastic location to quickly reach excellent areas in both the Dark and the White Peak. The smaller group and the cottage ended up working really well and this is the format I have decided to use for next years workshop with a small group of just three or four photographers.

 Weather wise we couldn’t have asked for more perfect conditions. The first afternoon we met was  a bit overcast, however this ended up working well as we just photographed the nice waterfalls with the autumn colours at Padley Gorge. Day two saw a nice sunrise with a bit of mist on a very cold and windy Mam Tor, the light on Edale and Kinder combined with the Autumn colours made for some fascinating pictures though. Sunset didn’t disappoint either, we headed up to , but walked along the edge until we reached the wonderful autumn trees near the 2nd car park. I have a rule on workshops not to shoot images myself, however the light at sunset was fantastic and even I couldn’t resist two quick shots myself.

 

Day three saw another fantastic morning, we headed up to Curbar Edge and we were standing above a spectacular cloud inversion, the mist just didn’t budge for hours and there were endless shots to be had here. Eventually we headed back to the cottage for breakfast and a bit of a break before heading back out to the White Peak for an afternoon of shooting picturesque sunny skies and autumn landscapes. Sunset ended up being a strange affair, we were again greeted with a cloud inversion which made for some excellent images initially, but suddenly the cloud thickened a bit too much and called an early halt to the sunset shoot. The final morning we were greeted with light drizzle so I decided to take the group to Chee Dale near Buxton. The overcast light ended up working really well for this location and even though the weather and rain was awful I really liked the shots everyone captured here and am looking forward to heading back in the future to shoot the place myself.  Both the boat workshop and the Peak District group were full of fantastic people and certainly made for two really enjoyable weekends, so much so I am actually looking forward to next years already.

Hopefully the winter will be nice and cold this year as I really want to try to do more photography myself in some of the Peak District and Lake Districts more remote location, especially those on higher ground looking down with fantastic views.