Post by Peterj on Sept 22, 2018 1:40:41 GMT
Many of you are probably aware raw images can be manipulated quite a bit as was I. I have a 12 Mega Pixel Panasonic Lumix DMC fz300 bridge camera that has a Leica lens built in with the capabilities to zoom optically from 25mm to 600mm while maintaining f2.8. It also has the capability to perform "intelligent zooming" to 2400; of course I know that digital zoom is cropping. Panasonic claims that it has programming that makes digital zooming "useable". Up until now I stayed with the very capable 600mm optical.
During my lesson preparation on lunar photography i decided to present samples ranging 25mm - 2400mm to graphically display size in order to help the folks set reasonable expectations for their equipment. I tried an experiment: capture a 600mm raw to compare with a 2400mm jpg (camera in extended zoom has only jpg capability). Camera was tripod mounted, manual mode, 2 sec shutter delay, ISO 100, 1/250 sec at f4. I had a nice capture at 600mm that was a raw file, the 2400mm jpg was passable (almost). I used On1's resize to resize my 4000x3000pixel 600mm raw image to 16000x12000, save, then crop to 4000x3000 to compare. I was surprised just how well the resize looked.
600mm jpg
side by side screen shot
600>2400upsized on left ................... camera digitally zoomed to 2400mm jpg on left
