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I read from manual saying that "max aperture up to 5.6 the cross-type AF sensitive to both vertical & horizontal lines are possible". What does this mean??? "With 2.8f, the center AF point's sensitivity to vertical & horizontal lines is about twice as sensitive as the other AF points". What...

Dear expert, Who could explain what is lens' maximum aperture & AF sensitivity??? How it helps in photo shooting?

Hi All, I just bought a canon speedlite 580EXII, there any good website for better flash photography?

I am using laptop now, if that the case get in a LCD monitor to edit photo?

buy a monitor that connect to laptop?

Any different editing photo in PC monitor compare with laptop? any std brightness to follow?

good website !!!. Thanks

any comment for 15-85mm?

Is there any good website to teach on studio lighting technique. I am looking for diagram that come with image result. Thanks

Any recommendation for a general + macro lens?

what does it mean by 'effective aperture (in terms of relative DOF) will drop to 1 & 1/3 stop'..could you help to explain further this...thnks

crop body

Is 50 1.8 sufficient for food photography?

U use 10-22mm??

So, not getting 17-40 for my crop body due to reason? 1) Not worth in term of pricing 2) Short range of FL 3) Work better for FF 4) No IS & F4

canon 17-55 may be too expensive for me....any comment on 15-85?

Shall I go for Sigma 17-50 / Canon 17-55?

dear all, sorry, is the lens IQ, CA ok?...i planning to getting this to replace my 18-55....is the f4 good when wide open?

Dear All, Is there anyone experience with 17-40L & 15-85 on crop body? Please share.....