EX zoom, i.zoom and digital zoom

Started 2 months ago | Discussions thread
Dak on cam
Dak on cam Senior Member • Posts: 1,287
Re: EX zoom, i.zoom and digital zoom

dbelling wrote:

Jon_T wrote:

I use the 10MP i.Zoom similar to Gerald noted.

At least with my FZ1000 the overall the 1124mm EFL IQ results seem to look better than the 20MP 800mm EFL i.Zoom.

What I've found to get best IQ from using FZ1000 10MP i.Zoom is to:
• Get as close as you can to subject (bird, etc.) so subject 'fills' the image area.
• Good daylight lighting conditions (to keep lower ISO)
• Use base ISO setting, as lighting conditions will allow.


Very interesting. If I understand you correctly, you get better IQ by using EX at 10mp + 2x i.zoom than just the 2x i.zoom alone? I wonder why that would be, unless a 10mp image works better with i.zoom than a 20mp image? Thanks for the information.

i.Zoom does crop, digital magnification and edge enhancement.  EX just crops at its full extent (and only then does i.Zoom kick in).  If you afterwards reduce to some smaller viewing resolution, the precropped variant does its edge enhancement at a resolution closer to the viewing resolution.  Since edge enhancement does not add information but gives the existing information more visual impact at the pixel level, being closer to the pixel size of the viewing device may very well give the intended effect better leverage.

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