Peak District mammatus
Posted 13 April 2012 - 00:13
Thunder once every 30 seconds and torrential rain blanketing the moorsides, it wasn't until the back-edge started to move through before I realised the spectacle to follow.
The mammatus were under-hanging from mid-altitude, so much so that downdraughts were forcing them to the surface in places as areas of precipitation. It was a textbook example of when a TCU rapidly develops into a CB, but then exhausts its energy through latent heat and evaporative cooling takes care of the rest.
Photography wise the ISO settings were all over the place so I went with 64-100 to compensate for the back lighting of the sun, which turned out a little grainy but luckily boosted up by HDR and a bit of tweaking with contrast settings.
Posted 13 April 2012 - 06:10
Posted 13 April 2012 - 11:24
You're more than welcome to have a go at resizing Glyn. In hindsight given the ISO noise, at least I know next time to boost it up to 200 at the least for exposure compensation.
Posted 13 April 2012 - 11:46
Picasa can resize using the 'Export' function, though it's "HDR-ish" is an effect and not true HDR image-stacking.
I did it quite simply using MS Office Picture Manager, though that does lose a little quality on resize...