Panasonic 100-300 vs. Olympus 75-300 II lens test

Started Apr 4, 2013 | Discussions thread
bgalb Senior Member • Posts: 2,179
Re: Panasonic 100-300 vs. Olympus 75-300 II lens test

The test conditions were totally wrong to compare the critical sharpness of two lenses.  The test target was really strange.  Why the foggy appearance at the bottom of the image? There wasn't enough light to make a good test.  Its hard to tell, but it looks like there may have been a pretty good wind blowing.  Different sections of the fence are in and out of focus.  Not to mention that the focus point was different for the two lenses.

To do a valid outdoor test, you need calm, clear conditions with good light and a flat surface perpendicular to the lens axis with good, but not excessive, contrast between elements of different brightness.  If it was windy during this test, then 1/15 second is too slow.  It doesn't really matter how good your tripod was.  Also, the slightest touch on the camera will induce a lot of vibration motion with the long lens attached at 300 mm. A wireless shutter release comes to mind as useful to prevent camera vibrations due to handling when mounted on a tripod.

I have the panny 100-300 with a Roesch Tripod Mount.  Am always looking for a little more sharpness at 300 mm and would get the new oly 75- 300 in a heartbeat if I was convinced it was noticeably sharper at 300.

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