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Great article, thanks very much. However, I'm a bit confused by your statement above that you've giving up a bit of resolution: it seems from your test that although there was some additional astigmatism and distortion, the MTFs were higher with the SpeedBooster compared to the 5DmkII across the board? Or am I missing something?
I wrote that yesterday while I was still crunching the numbers. I think I wasn't mentally ready to accept those results, maybe
At that time I was looking at the astigmatism and the lower numbers (where astigmatism was having it's effect) do show a slight reduction, but the average at each location (sagittal and tangential) are improved.
It's why I said if I was shooting large-print landscapes, where the astigmatism would certainly show, I wouldn't be as happy. But for video or normal photography, I don't think it would be significant.
Edited on Jan 22, 2013 at 06:08 PM · View previous versions