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Is Canon EF-S 18-135 STM lens too soft in large apertures?

Started Feb 28, 2013 | Questions thread
photonius Veteran Member • Posts: 6,895
Re: Is Canon EF-S 18-135 STM lens too soft in large apertures?

massud wrote:

maarensv wrote:

massud wrote:

maarensv wrote:

Are those centre, edge or corner crops ?

center

OK, I expect those to be better than the samples you showed.

On the other hand, how many pictures do you take with aperture wide open ?

You showed only 18mm shots. How about the mid and tele FL ?

Regards, Sandor.

I have taken more than 50 sample shots in different focal lengths. Always same results. Here are two more samples in 50mm and 135mm.

50mm f/5

135mm f/5.6

the 135mm is almost sharper than the 50mm, should be the other way round.

I presume you did live-view focusing with 10x.

It does look like your lens is softer than expect from e.g. photozone tests

http://www.photozone.de/canon-eos/776-canon_18135_3556stmis?start=1

i.e. at 18mm in the center, it should already be quite sharp.

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