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Member Since 19 Dec 2008
Offline Last Active Sep 29 2015 12:49 AM

Topics I've Started

Underwater 3D Photometry - Second World War era Valentine Tank

21 June 2015 - 12:08 AM

Something I have been working on for a while now is underwater 3D photometry.


The subject are a pair of WW2 era Valentine Tanks. Used extensively by the allies, these are duplex drive (DD) variants designed for amphibious landings. These examples were lost during Exercise Smash in 1944, a training exercise leading up to D-Day. A further 5 tanks were lost and sadly six of their crew drowned. 


The models are derived from around 700 individual frames, all shot on one dive:-


Firstly, the intact example:-




Secondly, the damaged example:-




The tanks are annotated to highlight a few of their features.

Rectilinear wide angle lens on FX & behind Subal glass

17 June 2015 - 06:29 AM

...yeah, I know...another "what wide angle works.." thread...


So I have a very specific requirement to shoot material with a rectilinear lens. Here's the requirements/fits with list:-


  • As wide as practically possible, but NOT fisheye.
  • NOT zoom in any way or form.
  • FX frame - D700
  • Min focus 1m minimum. Closer better but not essential.
  • Subal DP FE4 glass - corner to corner sharpness at F5.6 to F8 to "no visible difference to centre of frame".


So what fits that list? Real world used it in anger experience most welcome...