[rober]

how much difference is there between the 2 sigma 70-300mm lens, besides the price? what features double the price?

[cupic]

I'd say that the APO version does preform better due to the extra coating .I dont know about double the price

cheers

[wildman]

how much difference is there between the 2 sigma 70-300mm lens, besides the price? what features double the price?

Don't have the non APO version so can't compare. The APO version is a bit soft at 300mm but otherwise decent. Very versatile lens. Use it a lot around the house for family gatherings etc.

$209 with free shipping at Adorama. At this price you can't go wrong unless you have unrealistic expectations - there's no free lunch.

[rober]

while searching here I'm finding posts saying you're better off with the 50-200mm. I guess if y'all could help me with what some of the terminology means I can make a more intelligent & informed choice. & let me explain that I'm pretty much a novice. While it's obvious there have to be features that distinguish the $2000.00 Sigma 70-300mm from the $300.00 model the differences ere more subtle between the $159.00 & $300.00 models. As far as budget I'd like to stay $400.00 or less. I should have bought a lens or 2 when I bought the camera 2 years ago. It seems like prices have nearly doubled. & most of the pentax lenses are on backorder.
OK-the lenses. I can check other websites later but for now here is what I found on Abe's of Maine
Sigma 70-300mm F4-5.6 DG $159.00
Sigma 70-300mm F4-5.6 APO DG$209.00
Sigma 70-300mm DG OS $399.00

Tamron 70-300mm DI LD $164.00
Tamron 18-200 XRDI $289.00
Tamron 28-200 XR DI Aspherical IF $274.00

SO-what do these terms mean? DG APO OS DI LD XRDI Aspherical......
I know this is a lot to cram into one thread & I appreciate any input. I'll also continue to search past threads & the archives.