Thanks Mark. I have one or two more to share - not sure if they are any better than this or not, but we'll see.
I really like the Sigma lens. It is a nice focal length and gives a little more versatility than a 80-200/2.8 plus converters, I think. To get to the same max focal length you only need a 1.4 versus the 2x on the 80-200/2.8 - my experience has been the 1.4x converters don't weaken the image as much. As to construction, it seems pretty well built - not as beastly as a Tokina, but very solid feeling. There seems to be quite a bit of magnesium in it which gives it a bit lighter feel. The tripod foot is well done as it is a quick clamp type so rotation is very quick. One turn and you can rotate and turn right back tight. Zoom is smooth and manual focus is quite well damped. Both focus and zoom are internal so the lens does not change size while working the controls and that is nice for balance. As you can see, I did handhold it the entire airshow without feeling overly burdened. As there really isn't anything else spec'ed the same, it is a rather unique and useful lens. If you have other questions, don't hesitate to ask. -- Bruce Tuesday, October 11, 2005, 5:29:30 AM, you wrote: MR> Bruce Dayton <[EMAIL PROTECTED]> wrote: >>Pentax *istD, Sigma 100-300/4 EX, Sigma 1.4X EX, handheld >>ISO 400, 1/750 sec @ f/5.6 - 300mm focal length + converter >> >>http://www.daytonphoto.com/PAW/norcalpdml_sf_140.htm MR> Great shot Bruce! I like the unconventional composition, too: There have MR> been so many air show photographs done over the years that it's MR> difficult to come up with something different that still works. This one MR> does it. MR> How's that Sigma 100-300/4.0? Sounds like a great focal length & MR> aperture combination for sports and wildlife photography, especially on MR> a DSLR. I'd be interested in size/weight and construction as well as MR> optical quality.
