Fred Miranda Offline Admin Upload & Sell: On
|
snapsy wrote:
Here is Rishi's comment about the update. Nice going Fred!
Rishi Sanyal
Yes, Fred was right, as I've now mentioned in some comments below - and we've updated the image to show proper 4 and 16mm image height circles. Our apologies for drawing diameters instead of radii - I blame under-caffeination yesterday morning as we were frantically trying to update the story to incorporate Roger's findings.
That said, this doesn't at all mean our methodologies are suspect - in fact, this finding probably strengthens our initial argument. That a fairly large portion of the image concedes an advantage in tangential 50 lp/mm MTF to the FE 55mm, since the region in between red and blue circles only appears larger now.
So, if anything, this finding just strengthens our claim - so why you use it to claim our methodology is 'suspect' is odd.
That said, we def do not find that our copy of the 50/1.4 was sharper than the 55/1.8 within that red circle, so there's still something going on here. Probably a poor copy....Show more →
Regarding their analysis, I still believe that both tangential and sagittal results along with other frequencies should be taken in consideration.
Like I wrote, I found the review very insightful, especially the way it compares bokeh rendering and coma.
The resolution section is also very good as it was shot at infinity. (My personal preference)
I believe that the discrepancy in their real world results, compared to Roger's test could be lens variation. Perhaps testing both lenses for de-centering or getting better copies could solve the puzzle.
|