Originally posted by John Diel
I got the chance to use one of these a few years ago. It's a monster!
It's adequate for it's uses, but for really good shots, you'll be better off with quality prime lens.
Yeah, I totally agree when it comes to the primes. The 300 4L prime, even with a 1.4x TC outperforms the Bigma at 500. I'm not sure about the 70-200 2.8+ TC thing, though. I came across a really interesting test image that compared the resolution/color of a whole slew of lenses:
http://www.pbase.com/drip/image/42148952/original (DUW, 350K image)
It would appear that even the 200 2.8L prime with the 2.0TC doesn't beat the Bigma, but the fact that it comes close is pretty impressive. The Canon 70-200 2.8L + 1.4TC also doesn't seem that impressive next to the Bigma (though the Bigma is at 5.6 and the Canon is at 4.0), so I have doubts that my Sigma 70-200 will do even that good:
http://www.pbase.com/drip/image/21661756
Prime + 1.4TC seems like a good bet. Which makes sense to me... most of my friends who've shot 2.0TCs seem disappointed with the quality.
Obviously, the lens to REALLY have is the 400 2.8L.
That's one freakin' sharp lens. As a bonus, I could do curls with it in the downtime to build up my biceps!
He's got way more tests on this lens here:
http://www.pbase.com/drip/lens_tests
Granted these are just center-focus snaps so it doesn't say anything about edge quality, fringing, vingetting, or any other of the things to watch out for. But what really made me stop and wonder if this wasn't a lens worth having was the Photozone test review:
http://www.photozone.de/8Reviews/lenses/si...0_463/index.htm
I've heard that Pop Photo was equally surprised and impressed, but their review isn't in their online archive.
Lens that long, you'll need on a tripod anyway, especially if you want good sharp shots. You're 70-200 is some excellent glass as the Sigma lens are known to be right up there on their quality lens. Not quite on par with the Canon L series, but still, right up there.
Yeah, I really do love that lens. That's kinda why I'm hemming and hawing and looking for tons of tests and opinions. I'd really kick my own ass if I sold off the 70-200, got the 50-500, and hated the thing. I can't find any local shops around here that carry the thing to test, though maybe if I make a trip to Omaha I'll find it. The main thing I'm worried about is handholding. I can handhold the 70-200 I have easy all the way up to 200 in good light. Can I handhold the Bigma up to 200 in good light? It's at least a stop slower at that range, and it looks like it's about as light as a bazooka. Obviously I wouldn't be able to handhold it over 300mm ever, but I can't even go that high right now, so even tripod 500mm shots would be something new and cool. I do have a pretty high-end tripod with a 13lb ball head, so I think it'd be do-able. Might finally motivate me to get a monopod, too.
I wish Canon made a non-push/pull zoom telephoto IS ultrazoom. My friend has a 100-400 IS L that's really, really, cool, but I cringe every time he pumps that thing. I have enough dust getting onto my sensor as it is! And the competeing Sigma 80-400 OS lens has crappy-slow zooming and lackluster optical performance. If they made a 50-500 OS HSM with the same optical quality as the current model, I'd be all over it in a heartbeat.