Full 180-degree Rainbow over Morro Bay, CA, with Dynegy aka Duke Energy under arch, 21 Jan 2010
Full 180-degree Rainbow over Morro Bay, CA, with Dynegy aka Duke Energy under arch, 21 Jan 2010. Photo by Michael "Mike" L. Baird, mike [at} mikebaird d o t com, flickr.bairdphotos.com; iPhone 3GS handheld. The focal length of my good camera setup (Canon 5D w/ 100-400mm lens) was way to long for this shot. Even my iPhone was way too long to capture the entire 180-degrees of this gem.
Tech note: Set auto-exposure point to be over the rainbow pattern for best contrast and exposure.
Tech note: [these specs are pre-3GS]
The iPhone's focal length is 3.85mm, but because of the tiny sensor's crop factor, this ends up being equivalent to a 37mm lens.
Focal length: 3,85mm (equivalent to 37,0mm)
Aperture: f/2,8 (fixed)
Focus: infinity (manually adjustable to 2cm)
Sensitivity: Auto ISO
Shutter speed: 1/5s fixed (light sensitivity is only regulated by per-pixel-ISO)
Depth of field: 1,47m to infinity
Sensor size: 1/4"
Resolution: 1600x1200px (3MP)
Dynamic range: 6,3 f-stops
Color space: sRGB, automatic white balance
Dimensions: 8mm x 8mm x 5mm
From: ideenecke.blogspot.com/2009/04/iphone-camera.html (written ~ 3-4-09)
(more) Jan. 12-15, 2010 updates
3GS 3-megapixel camera (resolution: 2048x1536 pixels)