My "upgrade" from 20D to 5D thoughts

Started Feb 15, 2013 | Discussions thread
qianp2k Forum Pro • Posts: 10,350
Re: My "upgrade" from 20D to 5D thoughts

Sovern wrote:

So you think that an 85 1.8 will perform better on FF with its football shaped bokeh on the edges which it does not have on crop body?

85mm/1.8 performs better on FF than on APS-C indoor and studio, too long on APS-C indoor. It's only F2.88 FF eq as on APS-C.

Funny as most would agree that primes and zooms that are in the medium price range perform better on crop body as they don't see the edges. The 35F2 is an excellent example of this as is this 50 1.8 a long with the 50 1.4.

"Most" agree? That's pretty funny. All EF prime lenses are designed and optimized on FF with ideal range on FF not on crop. The crop factor or lens focus length "multiplier" has a severe impact in IQ thru enlargement.

Most consider the Canon 17-55 2.8 IS to be better than some of their L lenses yet it is only $1,000 compared to the 24-70L II.

Better than what? 24-70L II is totally in different league. 17-55/2.8 IS is only FF F4.5 eq zoom. 24-105L on FF, not only cheaper but beats 17-55/2.8 on APS-C in sharpness and resolving more fine details (resolution) as confirmed by DXOMark.

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