I kept the ISO sensitivity low at around 200-400 to maximize image quality. I rarely encountered problems with exposure insufficiency when photographing Kingfishers since they live close to relatively bright waterside locations.
However, since Red-flanked Bluetails live in the dark forest, low ISO sensitivities necessitated shooting at slow shutter speeds, which increased the risk of blurring. Although Kingfishers and Red-flanked Bluetails both move extremely quickly, they remain relatively still when perched on branches. Since I tried to take photographs of perched birds, I judged that using the Nikon 1 would result in little blurring even at slow shutter speeds providing that the subject did not actually move.
In an SLR incorporating a large size mirror, camera shake is caused by the shutter curtain opening and closing when the shutter is pressed. From my experience, the probability of camera blur occurrence becomes extremely high at shutter speeds slower than 1/60 second.
In contrast, since mirrorless cameras, as their name suggests, do not incorporate mirrors, they will not be affected by mirror shock. Therefore, cameras such as the Nikon 1 are capable of taking pictures using an electronic shutter which eliminates mechanical shock from the opening and closing of the shutter curtain.,
In fact, when photographing the Red-flanked Bluetails, I took pictures using both the Nikon 1 and a single-lens reflex camera, and found that I discarded fewer of the Nikon 1 photographs due to blurriness from camera shake compared to the SLR camera, and the captured images were extremely sharp.
Even though I took the example photographs of the Red-flanked Bluetails with the aperture fully open at a shutter speed of 1/30 second, every single feather of the subject was captured sharply with absolutely no blurring. Of course, this was assisted by the resolving power of the PROMINAR 500mm which assures sharp image formation when the aperture is fully open.