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Old Apr 13, 2010, 5:52 PM   #11
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It's a relatively common issue with some of the ultra zoom "all in one" type lenses. Here's one thread on the subject:

http://forums.steves-digicams.com/so...al-length.html
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Old Apr 13, 2010, 6:09 PM   #12
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Ok, I will look at this again, a report back!!
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Old Apr 13, 2010, 6:31 PM   #13
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More discussion (this time concerning a Tamron 28-300mm lens). ;-)

http://forums.steves-digicams.com/so...tml#post506869

I've seen that issue reported with the Tamron 28-200mm lenses before, too.
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Old Apr 13, 2010, 9:33 PM   #14
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I have an older copy of the Tamron 28-200mm, and can confirm this. I should also note that the focus changes if you zoom the lens in or out. This can be a real issue when doing close-ups.

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Old Apr 13, 2010, 10:07 PM   #15
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Interesting info

I find that odd how they can market it at a specific range when it isn't a true statement. (Like lying about the horsepower of a car) Regardless whether 150 or 200, I still love this lens and for 100 bucks it still blows me away with its quality. I've gotten crappy images with this and all my lenses but the Tamron 28-200 produces many keepers. I really wish they would label it as the proper mm because being new to telephoto photography, I am basing my knowledge on my experiences and now my judgment of 200mm is skewed.

Well, I just got my Sigma 70-300mm lens today and she is a beut. The few shots I snatched with it in my terribly lit house came out very sharp in the middle range. I have yet to view close ups of the long and short ends.

This definitely has more reach than my tammy<200.

The auto focus was remarkably fast for what I had imagined. I pounded so many mixed reviews of this before it arrived, I was expecting near garbage to arrive in a box.

The zoom is terribly slow as if it needs to be oiled down. I think its just cheap design; having the zoom move the entire front element to zoom instead of a faster moving mechanism.( you can tell i dont know proper terms or part names, sorry) Besides being stiff, it will also stick. It's manageable for the price I paid for it so just like the tamron, its already beyond my hopes in quality. It is brand new however unlike the tamron 28-200 so if this stiffness is a defect, I can return it.

Thanks again for all the info. I was going to just start up a front topic with the tammy lens but rather waste space and flood the boards, thought id just ask you guys while I had you.



Edit: Perhaps it is true 200mm if u focus to infinity. I will have to test it between the two at 200 to see.

Last edited by NMRecording; Apr 13, 2010 at 11:12 PM.
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Old Apr 14, 2010, 1:01 AM   #16
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I also have a Sigma 70-300 and am generally pleased with it. Mine is a bit soft over the 200mm setting, and this is fairly common with this lens, at the telephoto setting. When used in the macro mode, it seems to work just fine.

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Old Apr 14, 2010, 8:03 PM   #17
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I took the 70-300 out today and got some amazing shots. Upon getting home I realized i had it on 1600 ISO the whole time on a bright sunny day. DOH ! I didn't think to check cuz they looked great in the viewfinder. I can probably salvage some of them.
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Old Apr 14, 2010, 11:15 PM   #18
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Been there, done that. Try taking pictures of white pelicans in bright sunlight at 1600 - it took me a while to figure out why my shutter speeds were so high. I was using the K10 at the time, I think, and the pictures were pretty sad.
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Old Apr 18, 2010, 3:39 PM   #19
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Quote:
Originally Posted by NMRecording View Post
My 28-200 tammy isnt the best reach for birds and wild life but I am enjoying the lens.

How would a X2 TC affect IQ and AF speeds?
You should forget that. TC works ok for long prime lens of F2.8 or faster. Rarely do I find (none actually) any positive comments even for * zoom. 2X TC is definitely no no for any lens. IMO
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