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EFS 17-55 USM corner blurriness: experts' opinion needed !

Started Nov 2, 2014 | Questions thread
OP 70d IF Regular Member • Posts: 155
Re: EFS 17-55 USM corner blurriness: experts' opinion needed !

MAC wrote:

70d IF wrote:

MAC wrote:

Do brick wall test on tripod with IS off. Shoot, then flip 180 and shoot again. Compare corners. Right angle orientation to the wall critical.

I have no brick wall at hand right now, but I already did this test, with the same kind of result as the hedge shown here.

your dof is as thin as it gets with that lens f2.8 and 55, I can't tell if you are perpendicular or not

those settings might be good for a portrait where the corner makes no diff

I'd like to see the brick shots and 180 flip which will tell us the data we need

I promise that I was perpendicular ! The dof was not so thin, because the hedge was at a distance of approximately 25 feet.

Anyway, I will try to do your test, but please be patient, I won't be able to do it until next week-end.

 70d IF's gear list:70d IF's gear list
Pentax K100D Canon EOS 80D Canon EF 85mm F1.8 USM Canon EF-S 17-55mm f/2.8 IS USM Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) +4 more
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