70-300 lens

[Bob]

canon lens 70-300 is .What does the DO stand for?
Bob:shrug:

[CT]

It stands for Diffractive Optic Bob.

Loads of info HERE (http://www.luminous-landscape.com/reviews/lenses/Canon-70-300mm.shtml)

[Bob]

Thanks for that am I right then that the lens are the same in quality and will perform and produce the same photos and that the main difference is the size and weight or have I miss read it
Bob

[CT]

Thanks for that am I right then that the lens are the same in quality and will perform and produce the same photos and that the main difference is the size and weight or have I miss read it
Bob

That's about it - the lens is 'L' quality as near as damn it without the size and weight penalty.

[Amp34]

According to these websites the IQ isn't actually much better than the standard 70-300mm USM IS.

http://www.photozone.de/8Reviews/lenses/canon_70300_4556do_is/index.htm

http://www.the-digital-picture.com/Reviews/Canon-EF-70-300mm-f-4.5-5.6-DO-IS-USM-Lens-Review.aspx

The second one thinks the non DO is actually the better bet if you aren't too worried about the size.