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Old Nov 28, 2010, 10:53 AM   #11
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The Sony 18-250 mm zoom is not a very good lens. You make the right choice to send it back. Tamron makes an 18-200 mm zoom which is better than the Sony and is also cheaper. It is only $189 after rebate: http://www.amazon.com/Tamron-AF-18-2...0962818&sr=8-1

The only thing is the range is 50 mm shorter than the Sony.
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Old Nov 28, 2010, 11:03 AM   #12
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So far I like the Sigma 18-250 even though it's slightly heavier than the Sony 18-250.
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Old Nov 28, 2010, 11:03 PM   #13
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The Sony 18-250 is a great lens. Some times I wonder why I have invested so much into my lens collection ( from 8mm to 400mm in about 16 different lenses ) when I look at the results I get with this lens.

I would try another Sony.

Check it out. All these pics were taken with a Sony 18-250.

http://forums.steves-digicams.com/la...ighthouse.html

http://forums.steves-digicams.com/la...ugh-rocks.html

http://forums.steves-digicams.com/wi...-blue-jay.html
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Old Nov 28, 2010, 11:08 PM   #14
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On battery life, I notice when I use my G lenses with SSM ( in lens focusing motor ) that the battery life is shorter then non SSM lenses.
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Old Nov 29, 2010, 5:31 AM   #15
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Quote:
Originally Posted by Clint501 View Post
... I did seem to notice that using the lens IS in the Sigma 18-250 that the battery seemed to drain faster. So I wonder is the lens IS uses more power than in body IS.
That makes sense. It probably does take more energy to flip-flop those optical elements that to rattle the image sensor assembly.
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Old Nov 29, 2010, 5:48 AM   #16
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Sigma 18-250mm f/3.5-6.3 DC OS HSM (Tested)
Sony 18-250mm f/3.5-6.3 DT SAL-18250 (Tested)
Tamron 18-250mm f/3.5-6.3 Di II LD Aspherical IF Macro AF (Tested)

None of them is much better than the others.

None of them is as good as the Sony 18-55mm f/3.5-5.6 DT SAM SAL-1855 (Tested) kit lens plus the $165 Tamron 70-300mm f/4-5.6 Di LD Macro 1:2 AF (Tested).
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Old Nov 29, 2010, 9:18 AM   #17
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I agree TCav - after all that I read there was not a "clear winner". Each had it's positives and negatives but nothing that read gave hands down winner.
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Old Nov 29, 2010, 9:35 AM   #18
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I think you probably just got a bum lens with the Sony if it's soft on one side (it's probably got an optical element alignment or decentering issue).

From what I can see from the charts, the Sony does really nicely for sharpness if you use it down a stop or so from wide open. IOW, just use it at f/5.6 to f/8 and you'll be fine through most of the focal range -- perhaps going to as much as f/11 on the 250mm end if you're "pixel peeping". It also seems to be a well liked lens from user reports I've seen.
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Old Nov 29, 2010, 11:50 AM   #19
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I think you are right Jim. It occurred mostly using the shutter mode for some reason. One shot would be OK then the next re-focus the right side would be off.

Here's an example - had numerous ones that the right side was blurred but the left side was sharp.

I think I'll stick with the Sigma for awhile even though I prefer the weight of the Sony.

I think I just got a bad one.



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Old Nov 30, 2010, 12:54 PM   #20
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The communication through the lens is always slower and will take more power.
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