I have had eight and returned none of them. Maybe I should look at them again with some test screens, but I've never seen anything that stood out in my photos.
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pdirestajr said:I wonder how many people were shooting test charts and returning lenses in the film era.
I think it's crazy when people say things like, "my lens was a little soft at f/1.4 so I exchanged it", or "my ultra wide-angle lens' edges are soft wide open". At what point are people chasing unrealistic and unnecessary expectations?
victorwol said:Of course. You paid for it you have the right to demand what you expect from it. It is just some people expect unreal things. Of course a lens is a +/- 10 has a serious problem. I tested 5 with focal and no one was more than +/- 1 so I stopped because got bored of testing them.
victorwol said:eBay risky? Why? I have sold so much gear lately... How can a place like this be less risky with all the protections eBay have in place? Just wondering. Not looking for a debate.
Testing for absolute sharpness is difficult unless unless you have some lenses of the same type, but you can roughly compare to the iso crops from the digital picture. Adjusting afma is easier (or more expensive if using focal pro) - but looking for decentering is really easy and that's what I did above: Shoot a test chart so that fine patterns at the edges and corners, then compare the relative sharpness of the outer areas.Badger said:I'm a bit embarrassed to admit this, but I'm not even sure what to do to test a lens.
Good question, that's why I attached the crops above. But for even for €670 (which actually is also a lot of money to me, I could nearly buy another 60d for that) I expect the lens to perform at the top 1/3rd of the potential - and it's frustrating to see that one side of the lens is visibly sharper than the other.pdirestajr said:At what point are people chasing unrealistic and unnecessary expectations?
LetTheRightLensIn said:At times, the 17-40L has been notorious for that (a few years ago many people complained about one side being worse and every single person always mentioned the same side so I wonder if there had not been some bad runs on it a few years ago). I exchanged my first one. Pretty huge difference.
I'm sure everyone here know this http://www.canonrumors.com/tech-articles/this-lens-is-soft-and-other-myths/ by heart but for those who missed it its a useful read.East Wind Photography said:Might also have to do with the body it's used with.