Photography

Mark Ratledge

The photos above are panoramas (of approximately 150-180 degrees) made up of three or four frames from a Canon Powershot SX100 IS digital camera, shot at wide angle (~20mm) with as small an aperture as available light and a ~1/60th shutter speed will allow. It’s a good camera, but a bit limited sometimes as it will only stop down to f8. (My old film cameras would go to f32.)

The images rotate randomly via jQuery script, so if you reload the page or go to another page on the site you’ll see a new image. Or click on the image below for a slideshow; click the arrows to go back and forward through the images, or use the “X” or escape key or click outside the slide to quit.

Above Headquarters Pass

 

The eight megapixel frames are stitched together with several different panorama software utilities. Sometimes I use Adobe Photoshop to adjust contrast and fix obvious glitches along the seams of the frames, but don’t try and make the images perfect.

I like the unusual feel panoramas give, beyond the obvious fact that they show more of landscape than a single frame. You’ll notice that fence lines curve and clouds seem to arch over mountain ranges; those effects are from the distortion of the wide angle lens. Water differs in appearance – blurred in the middle of the image and not in motion at one side – as a result of the shutter speed, which was faster or slower when each of the three frames was shot. And obviously, different frames have different contrast gradients and lighting angles that show a change from full light to shadows at the edges of a panorama.