Re: Sigma 170-500 APO

2006-02-22 Thread John Whittingham
> The two low points for the lens is the slow max aperture and the > length it extends when zoomed. It is not a lens that can be used > handheld (over 300mm), nor is it very useful for sporting events (due > to the speed). > > I find that I get more use from my APO 300/F4. When I need the extra

Re: Sigma 170-500 APO

2006-02-21 Thread Perry Pellechia
As a follow up to my comments. Here are two examples from the *istD with the Sigma APO 170-500. Warning! Warning! Warning! These are full 6.1MP images straight out of the camera. Shot jpeg iso 800. EXIF intact. They are each over 2Mb. They are not retouched at all. No sharpening, so they will ap

Re: Sigma 170-500 APO

2006-02-21 Thread Perry Pellechia
Brian, I have this lens in Pentax mount. Overall it is an OK performer. AF speed is average compared to others that I use with my *istD. Sharpness is pretty good at one or two stops down. It is best at mid range (250-400mm), just as you would expect with a zoom. The two low points for the len

Re: Sigma 170-500 APO

2006-02-21 Thread brooksdj
Nikon version. Not bad, but i only have a few test shots. As suspected a tad soft at 500,but i'm impressed. Dave > Anyone have this lens mounted to their AF body...ideally a *istD? Feedback? > Thanks in advance! > == > Brian Diper

Sigma 170-500 APO

2006-02-21 Thread Brian Dipert
Anyone have this lens mounted to their AF body...ideally a *istD? Feedback? Thanks in advance! == Brian Dipert Senior Technical Editor: Mass Storage, Multimedia (audio, displays, 2-D and 3-D graphics, and still and video imaging), PCs and Peripherals EDN Magazine: http:/