Canon 60d/ 50d and EF-S are garbage and soft? Explain this.

Richard wrote:

Before you get your undies in a bundle, this is not a troll thread but a serious question to what I see as a serious issue.

While replying to another thread, I was going to give examples how a lens could be soft at f wide open and sharp at F8 on a 60d.

So I head over to the digital picture where the guy rates lenses and shows us how they differ in resolution at different focal lengths and fstops. So I go to there for a view of the EF-s 18-135 on the 60d.

What I find there is no difference in apparent center sharpness between wide open and f8 at any focal lengths.. they all look very soft.

Digital picture review of the EF-S 18-35 on 60d

So then I look at all the other EF-S lenses, the ISO test shots are all taken on the 50d 15mp or the 60d 18 mp. They all exhibit the same behavior all soft. You can see the images change slightly and when choosing f16 you can see the images get a little softer or show CA.

So then I checked all the EF lenses and you can see a difference between wide open and stopped down, except for primes 135 and up seen to not get sharper as you get to F8. They are sharp all the way.

So then I look at DPreview of the EF-s lenses there are tested on the 450d which has a 12mp sensor and it shows that there are differences between center resolution at different Fstops.

So my conclusions are,

the 50d and 60d are higher resolution and they show no difference

The method that the guy at The Digital Picture are not showing the differences or the site has a problem.

I am missing something in viewing the ISO crops

Something is wrong, it would seem or it would seem the higher resolution APSC cameras do not play well with the EF-S lenses.

What do you think?

I have already sent and email to the guy at Digital Picture asking him why the difference between DPreview and his ISO shots. So hopefully I will have an answer.