Coburg Street Lights

Coburg Street Lights

The lights of Coburg Street and passing cars in a long exposure shot of the street from the traffic lights at the junction with Bridge Street.

This was a 15 second exposure at f/22. The lovely star shape of the street lights is because the opening in the lens was so small (at f/22) and the diaphragms of my lens. It takes a long time to get the exposure but it’s worth it!

This appears to be a beautiful example of Fraunhofer diffraction. It is due to the wave nature of light. The effect depends on the wavelength (that is, the color). It is most pronounced when bright light from a practically infinite distance passes through narrow slits, causing the light to spread perpendicular to the slits. This spreads a point-like beam of light into a pair of streaks.

Using a small aperture creates slit-like situations at the corners formed by adjacent blades. Thus, when you have a combination of relatively intense, pointlike, monochromatic light sources in the image and a narrow aperture, you should see a streak (of the same color) emanating from the points in two directions perpendicular to the blades…

…Finally, length of exposure is related to the occurrence of this effect, as you have observed, but only because exposures with bright points of light are almost always made much longer than needed to record the lights: you’re trying to see the rest of the scene, which is much darker. The brightness of the diffraction streaks decreases so rapidly away from their sources that if you used a sufficiently short exposure to properly expose the lights themselves, the streaks would be practically invisible.

Aperture ƒ/22
Camera Canon EOS 6D
Focal length 19mm
ISO 100
Shutter speed 15s

Light Trails on MacCurtain Street

Light Trails on MacCurtain Street

Ghostly light from passing cars hangs in the air on the corner of MacCurtain Street and Bridge Street in Cork City, Ireland.

This is the second of three light trails or light streaks photos I’ll post here in an unintentional series of long exposure photos. The first was my Light Trails in Blarney photo published yesterday.

Aperture ƒ/22
Camera Canon EOS 6D
Focal length 17mm
ISO 100
Shutter speed 8s

Light Trails in Blarney

Light Trails in Blarney

The red lights of a passing car streak across this photo taken in front of Christy’s in Blarney over the weekend.

The photo was a long exposure of 8 seconds, at f/4, ISO 100. I was shooting in manual mode and made sure the scene was under exposed by at least a stop. As f/4 was my widest aperture the lens captured as much of the red light as it could.

I took numerous shots of this scene and was bent over my camera (with my wallet under the lens to angle it upwards) so long that a woman came over asking if I had lost anything!

Aperture ƒ/4
Camera Canon EOS 6D
Focal length 17mm
ISO 100
Shutter speed 8s

Blarney Men’s Shed win best St. Patrick’s Day Parade float

Blarney Men's Shed

The Men’s Shed in Blarney constructed this fabulous float for the St. Patrick’s Day Parade in Blarney yesterday. It was voted the best float of the day by a panel who reviewed the parade.

The cart was made by members of the Shed so, as the announcer in the village said, it may be the newest cart pulled by a horse in the country now.

Aperture ƒ/8
Camera Canon EOS 6D
Focal length 105mm
ISO 500
Shutter speed 1/100s

The Peace Park

The Peace Park

Many Cork people think the Peace Park is Bishop Lucey Park on the Grand Parade but it’s actually at the top of South Mall next to the Electric bar. It’s hard to blame them. If you do a search for cork peace park the first link goes to the Wikipedia page for Bishop Lucey park but at least the first paragraph there explains the mistake.

Pictured is the World War I memorial on the site.

Horse Trough in Parnell Place

Horse Trough in Parnell Place

It’s been many years since horses have drunk from this trough in Parnell Place, Cork but it’s great this old street furniture is still here. There’s a similar one on Alfred Street, in front of Mc Loughlin’s.

The Bandon Road Roundabout, pre-flyover

The Bandon Road Roundabout

The flyover over the Bandon Road Roundabout in Bishopstown is completed (or so I’ve read, I haven’t driven over it yet) but here’s what it looked like 2006, well before any work was done. The pedestrian walkway I took this from is long gone and the area itself looks a lot different now!

Now, all we need is a north-south road with a 100kph speed limit and we’re all sorted.

Further info on boards.ie and Evening Echo and here too.

WEDNESDAY, JULY 24, 2013
A NEW era of motoring in Cork dawned today as the city’s new 60 million twin flyovers opened to traffic on the South Ring Road.
Traffic travelling both east and west on the N25 were directed on to the new flyovers at the Sarsfield Road and Bandon Road roundabouts from 6am this morning.
Up to 60,000 vehicles every day will now be taken off the two roundabouts, vastly reducing traffic congestion in the Bishopstown and Wilton areas.
Travel times are also expected to be cut by up to 30 minutes at peak traffic periods with the opening of the flyovers which took two years to complete.

Aperture ƒ/22
Camera Canon EOS 20D
Focal length 10mm
ISO 200
Shutter speed 1/20s