For this assignment the client wanted day and night photos of this recently updated financial services building. Normally that's not a problem; I take one set of images in the day time and another in the evening. In this instance this created a challenge because the building is a three hour drive from my home base. And the front of the building faces north so daylight only spreads across the front of the building for a few hours in the early morning and again in the evening. Lastly, when in full leaf the trees along the road obscure most of the new features on the building.
I have an iPad app that tells me where the sun and moon are at in given location and day. Using this app - and a reliable weather forecast - I was able to determine the optimal time of day for the photos. The daylight photos were taken around 7 pm and it took me about an hour. Then hung around for the sun to set and the lights to come on for the evening photos. Then I saddled up and hit the road for home. A late night, but such is the life of an architectural photographer.