Coolpix 5000 in the surf

My nephew Caleb's class teacher wanted some shots of their surf class and I was volunteered. I thought that surf was not the place for my precious D80 with it's push and clip port system, so the cheaper and more robustly housed Coolpix was dusted off and charged up.

I fitted the wide adapter and screwed on the dome port, set the focus manually to 2m, the exposure to Aperture priority f/8 for max depth of field and the ISO to 200 for shorter shutter speeds and the shutter release to high speed continuous. I could take 3 or 4 shots in quick sequences as the kids stood up on waves.

The day was very grey and dull with poor surf but the results were great. I smeared saliva on the dome port to reduced water drops but that produced some patchy blurring. May have been better to dip the camera under between shots.

This is an example of downgrading to get the results.

Sigma 15mm FE arrived today

The first thing needed was a comparison of angle of view. How wide is this lens with the DX sensor?
Being a fisheye lens the normal angle of view ratios dont apply. With a rectilinear lens you just multiply by the crop factor so a 15mm film rectilinear = 15 * 1.5 = 22.5mm on the D80. A 15mm fisheye is much wider than a 15mm rectilinear lens.

Nikon Coolpix 5000 with WC-E68 wide converter - TOP
Nikon D80 with Sigma 15mm FE - BOTTOM

The Coolpix wide setup gives the same angle of view as a 19mm lens on a full frame camera.
Calculation - 7.1mm Coolpix = 28mm film, multiplied by .68 (Wide adapter) = 19mm

D80 with Sigma 15mm FE gives a slightly wider horizontal view (maybe like an 18mm lens on film) and slightly less vertical view. So the equivalent would be about a 12mm rectilinear lens.
Calculation - 18mm divided by 1.5 (Crop factor for D80) = 12mm

Pay no attention to image quaity. Coolpix image cropped top and bottom from 4:3 to 3:2.