02-26-2013 10:03 PM
02-26-2013 10:12 PM
Tamron, Tokina & Sigma have several very good lenses, but they also have some duds. I strongly recommend that you be very specific on what lens you're shopping for & how you intend to use it. (IE landscapes, action, low light etc). The more info you supply the better.
02-26-2013 10:19 PM
Like most lens manufacturers, it depends on which lens you are looking at. I have a friend that has one of their SP 70-300mm VC USD zooms that is pretty sharp. He hasn't had any problems with it and is very happy with the image quality. On the other hand, I have one of their AF28-300mm F/3.5-6.3 XR Di VC that I purchased as an alternative to the Canon 28-300mm f3.5-5.6L IS that I also own for when I want to travel light. The Tamron is much smaller and lighter but the image quality suffers quite a bit compared to the Canon L lens. Of course the Tamron is probably 1/4 the price and weight so it's a tradeoff. The VC (image stabilization) on the lens works very well but the images are soft if printed or viewed at a large magnification. The Tamron is amazingly slow to focus with a Canon 5D Mark III once the aperture gets to f6.3. Even at f5.6 the lens is no match for the more expensive Canon where focusing is concerned.
02-26-2013 10:23 PM
02-26-2013 11:05 PM
As a general rule the greater the range the lower the IQ (image quality) & the more it costs the better the IQ, but there are exceptions. Superzooms like the 18-200 & greater are a compromise, BUT many are very happy with them, myself included when it fits my needs (which can be cost or size / weight). I have the original version of their 18-270 VC & used it last year as my travel lens on a 7D; AND when I went on my annual vacation to Cozumel Mexico I found out there was going to be an air show a few days after my arrival. I used what I had & i'm happy with the results as would most people, but when you look carefully the IQ on the wide end is a bit soft. Very few people would notice or complain about thatsoftness and I won't either but I have better gear & a lot of experience shooting air shows, but they are radio control events using smaller & faster (considering the scaled down sizes).
The newer version of the 18-270 VC is supposed to be better, but I don't know whether it's the IQ or AF that's better or both, but this is the link to my results using the original version on a 7D (18 mpixels, fast AF system).
https://picasaweb.google.com/TCPRCphotos/AirShowCozumel2012
If you'd be happy with similar results & are looking for a 1 lens solution then a bit more research should confirm whether or not it's worth a try.
02-27-2013 08:25 PM
I was just reading a photo magazine at lunch today, and it was testing "affordable telephoto" lenses. The Tamron 70-300 came out on top in that "contest".
What lens were you looking at?
02-28-2013 04:05 PM - edited 03-02-2013 11:41 AM
I can't vouch for any of the Tamrons but I can say some very good things about the Sigma 50-150mm f/2.8 EX DC OS HSM APO and it's cousin the Sigma 70-200mm f/2.8 EX DG APO OS HSM.
Right up front neither of these lens' are “L” level or quality. But they are pretty darn good.
I know of some problems with certain off-brand lens' so make sure the one you choose works with your camera. Sometimes you can send it back to the manufacturer and have it re-chipped to work but who wants to do that?
Stick with Canon if you are able to but in my case Canon does not make a 50-150mm lens for crop cameras.
03-01-2013 01:55 PM
The New Tamron 70-200 2.8 and 24-70 2.8 VC's are pretty good from what I've seen and heard. Throw in a Sigma 35mm 1.4 and you've got a sweet 3rd party kit.
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