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Old Jun 17, 2006, 7:33 PM   #101
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Crop 2


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Old Jun 17, 2006, 7:41 PM   #102
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In the crops above, I am sure you can guess which is which.The softness at the wider apertures in the Tamron shows, but to me it is subtle, not dramatic. And the difference all but disappears at f8.

Crop 3




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Old Jun 17, 2006, 7:47 PM   #103
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Crop 4

By the way, I cropped all images around thepoint of focus.They are pretty close,aren't they?

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Old Jun 17, 2006, 7:52 PM   #104
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Crop 1 - 28-300
Crop 2 - 28-75
Crop 3 - 28-75
Crop 4 - 28-300

Confession: I cheated

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Old Jun 17, 2006, 7:56 PM   #105
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JimC wrote:
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Crop 1 - 28-300
Crop 2 - 28-75
Crop 3 - 28-75
Crop 4 - 28-300

Confession: I cheated

Of course you are right on. I don't see the lens brand in my Exif info. Which program do you use to read yours? But one has to admit, it's not a night-and-day difference. I will try more shots indoors and in other conditions, but so far I see no reason to toss my Tamron. And believe meI would if it was clearly inferior.

Rainer

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Old Jun 17, 2006, 8:00 PM   #106
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Cavemandude wrote:
Quote:
How does the EXIF give it away?
Max available aperture (only the 28-75mm would have f/2.8 available).

rduve

Actually, the 28-300mm doesn't seem to do too bad.

But,it was too hard to resist looking at the EXIF with a quick right click on the images using IExif. ;-)


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Old Jun 17, 2006, 8:24 PM   #107
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If you're using PS, just use save for web and it will stripout the EXIF.

With something like Irfanview, there's a check box for retaining the EXIF when you use the Save As option (uncheck the EXIF box and it won't keep it).

I leavethe EXIF in most of the time. But, if I wanted to get people to guess what lens I was using, I'd probably want to leave it out (otherwise, you'll get cheaters like me if there are enough differences between the lenses to figure it out). :-)
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Old Jun 18, 2006, 1:05 AM   #108
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Rduve,

Thanks for the comparison shots! I was doubting the Tamron before, but your comparison shots definitely put it in a new light for me. You're right that the KMseems only slightly sharper in the samples you posted above. I've got enough lenses to play around with now, but I'll still consider picking one up since it's only $140 on ebay :-).

Does anyone else have any other recommendations for a travel lens?
I'm happy with my 24-105 for travel, but i think that extra reach with the Tamron would be nice.
My cousin has a KM 18-200, and to me it is noticeably soft throughout the entire focal range.

Rusty
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Old Jun 18, 2006, 1:37 AM   #109
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JimC wrote:
Quote:
Cavemandude wrote:
Quote:
How does the EXIF give it away?
Max available aperture (only the 28-75mm would have f/2.8 available).

rduve

Actually, the 28-300mm doesn't seem to do too bad.

But,it was too hard to resist looking at the EXIF with a quick right click on the images using IExif. ;-)


JimC: Cheater! But you have to admit, it would have been hard to guess without the Exif.

Now, after posting the pics above I went shopping and took my kids to a pet shop. And that's, as predicted, is where the KM 28-75 shines. Here are a few shots I took with it. The Tamron in comparison was either blurred due to the smller aperture or pics were noticably softer because I had to use the widest aperture of f3.5. Check this out. Here is a shot taken with the KM.


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Old Jun 18, 2006, 1:48 AM   #110
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and another one with the KM 28-75
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