Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens

**mpnguyen** · 03-31-2006, 04:41 PM

Please give any advices for this lense if some one used it already. I want to buy it.

**Cadwell** · 04-02-2006, 10:27 AM

Why do you want this particular lens? It does have certain advantages, but it's not the most popular lens out there...

**mpnguyen** · 04-02-2006, 02:53 PM

I like this lense, because it is light weight. I love 70-200 3.5L but it is a heavy one. They both made with different material so. Therefore if you know how bad it is, tell me, so I won't buy it.

**Cadwell** · 04-02-2006, 03:13 PM

It's (relative) light weight and small size are it's advantages.

It's disadvantages are the fairly average optics, zoom creep and bizarre bokeh. Oh... and it's rather high price.

The new EF 70-300mm f/4-5.6 IS USM lens has optics to match and costs about half as much. It's also lighter. It's only major issue is a tendency to go soft at 300mm when held in portrait orientation.

**Piece** · 04-02-2006, 05:34 PM

cadwell, what is zoom creep?

**Cadwell** · 04-03-2006, 02:38 AM

"Zoom creep" is a disease which affects some zoom lenses which change length whilst zooming. When the lens is held in a downward pointing direction, gravity is enough to cause the lens to extend thus changing the focal length. This can be a right royal pain in the backside when you have set your camera up for a particular location.

Better engineered zooms either a) don't extend (internal zooming lenses like the Sigma 100-300) b) have a clutch mechanism to prevent it from happening (Canon 100-400L and it's like) or c) are sufficiently well designed not to do it. (Canon 24-105mm etc.).