So this test / show of results was prompted by another thread where there was some light discussion about noise reduction and image stacking. I figured I should post evidence of my claims I love tomatoes, they taste good, and they photo well too because they stay still! Tomatoes at iso 200 from an E-P1 : here's a 100% crop showing some noise : Here's the same tomatoes also at iso 200 from the same E-P1 but 20 image stacked : here's a 100% crop showing how smooth the pasta sauce, err photos can be The merging was done with a program called ALE and it took just over 1 hour to stack all 20 images, but after further research below is information on how to use hugin which does the same in a few minutes. -- ADDED HUGIN INFO -- 1) open hugin panorama creator (yeah it's called panorama but it does everything under the sun) 2) open all the files 3) select "align" and let it do it's thing, all images will line up perfectly (just close the window that openned showing the nice alignment grid etc) 4) do NOT click create panorama, instead on the top tabs, click on stitcher, un-check "panorama outputs", scroll down a little more and check "layers", now click stitch on this panel. TA-DA! perfectly aligned, and merged tomatos with much less noise and it runs much much quicker than ALE (only a few minutes) and it is some-what graphical interface for those who are command-line-aphobic. The quality seems on-par with ALE. No one wants to eat noisy tomatos eh? Here's a link to 3 sample tomatos if you want to try it yourself https://picasaweb.google.com/109795170641138724329/January202013 Even with just 3 images the noise reduction is fairly dramatic, almost 80% of what the 20 images did. I think in real usage maybe 4 or 5 images is optimal.