STEP BY STEP
STEP 1
Focal length determines image scale. Too high a scale may give you a few bright dots against a featureless sky. Too low and your evening targets will be lost. For this month’s targets, we’d suggest a frame at least 18° high. For a full-frame DSLR this means using a lens with around 70mm focal length or about 45mm for a non-full frame model.
STEP 3
Mount your camera on a tripod, then frame and compose your scene. A landscape orientation with some horizon along the bottom of the shot gives your image some context. Make sure the horizon runs parallel to the bottom of the frame. Some cameras have level indicators built in so it’s worth checking manuals to see whether yours has this facility.
STEP 5
Set the lens to manual focus and focus on Venus. Select the lowest f-number then dial this back a stop or two. A fully open lens gives the best light gathering capability but could also introduce edge distortions. Set an exposure of one second and take a test shot. If the review image looks too bright, reduce the exposure; if it’s too dark, increase it.
STEP 2
A location with a flat horizon will give you a clear view of your targets but may end up looking a bit bland. Choose a location that gives you a relatively flat horizon but with some foreground interest too. Even wispy clouds can enhance twilight shots. Be careful not to overdo this, or you’ll end up not being able to see what you came to photograph.
STEP 4
Initial settings depend on the scene brightness and your setup. Use a low ISO value if you can, about 100-800, as this will help keep unwanted noise down and result in a more tonally rich end result. Shooting in the RAW format offers more adjustment options post capture. If you’re new to RAW, shooting in RAW + large JPG is recommended.
STEP 6
Avoid extending exposure beyond 500/focal length (FL) seconds. If you need to go longer, try raising the ISO. Check the review image’s histogram. Ideally, the main part of the graph needs to sit between the two end points. Adjust your settings to achieve this but review and change them often to cope with the changing light levels at twilight!