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02-15-2008, 09:15 PM   #1
Igilligan
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Owners of the Tamron 28-75 f2.8 a ?

My wonderful wife has decided that this would be a great valentines gift for us! After much prodding from me.
So I am ready to order from B&H, but it just hit me that there is one thing I have never asked or remember seeing about this lens...
I have the Tamron 70-300 and it has a good amount of CA/PF in high contrast areas. Does this Tamron lens suffer the same issues? Especially since it has a larger Aperture at 2.8 thru the zoom range.

Does your copy of the lens have issues with CA/PF? Any other issues I should be aware of?
Thanks for the help.
I am looking to get a fast zoom to help catch the kids and I know I will use it at 2.8 often and I do not want to have to deal with purple fringing on the shots.

-gus-

02-15-2008, 09:46 PM   #2
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I have the lens and find it prefect really...There is not a single bad thing I can say about it...I also know what you mean about the 70-300 Tamron as I too have the same lens and same conclusion as you, but this not the case with the 28-75mm F/2.8
02-15-2008, 09:51 PM   #3
Igilligan
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Thanks Javier, that is such good news. Do you use it in lowlight situations? Is it reasonably sharp at F2.8 in real world usage?
02-15-2008, 09:52 PM   #4
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These 2 lenses are very different optically. The 28-75 is a gem. IMO everyone who will use a zoom, should get one. As Javier says, I'd be hard pressed to find a flaw in this lens.

Buy it without worry.

02-15-2008, 09:53 PM   #5
Igilligan
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Thanks Peter, I will click send on the order then...
Much appreciated.
02-15-2008, 09:54 PM   #6
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It is indeed sharp wide open and at both extremes but is better 1 stop down and back a bit from each end. But that's true of any zoom I've owned or ever read about. They always are a little sharper stopped down and a little softer when at each end.
02-15-2008, 10:12 PM   #7
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QuoteOriginally posted by Peter Zack Quote
It is indeed sharp wide open and at both extremes but is better 1 stop down and back a bit from each end. But that's true of any zoom I've owned or ever read about. They always are a little sharper stopped down and a little softer when at each end.
Yep, that is exactly what I have found and it really is great in low light.
02-16-2008, 01:01 AM   #8
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I second the opinions of jgredline and Peter Zack. Nothing negative to say about the lens. My lens, i think, is sharp straight from f/2.8 through. As for aberassions, nothing significant that i have ever noticed - at any focal lengths or aperatures.

02-16-2008, 05:21 PM   #9
Igilligan
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Thank you again Everyone....

Few lenses seem to have such support and few detractors...

Your time is much appreciated.
02-16-2008, 05:56 PM   #10
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I was using my 28-75 Di f2.8 today under perfexct purple fringing conditions, kids in multi colored snow suits playing in a snow bank under clear skys in briught sunlight.

I'll be dammed if I can see any CA at all.

This is a really great lens.
02-16-2008, 06:30 PM   #11
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Nothing more to add to what was already said... I actually use this lens very often wide open, and beyond happy with results.

Regards,
D
02-16-2008, 06:39 PM   #12
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QuoteOriginally posted by Igilligan Quote
Thanks Javier, that is such good news. Do you use it in lowlight situations? Is it reasonably sharp at F2.8 in real world usage?
I had to return mine. It was fantastic from F5.6 up, but a real mess from F4 to F2.8

I'm told this is rare and have seen some nice photos using the lens.

Dave
02-16-2008, 08:45 PM   #13
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Dave,

Yes, I remember, very very unusual, shame, but I guess bad copy does slip-in occasionally...

Here are few test shots with this lens wide open, shot in raw, converted with Pentax supplied software, resized in CS2/3, all settings at "O" and no post sharpening (all at f2.8 ISO 800, full exif should be intact):







Regards,
D
02-16-2008, 10:14 PM   #14
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QuoteOriginally posted by Duh_Vinci Quote
Dave,

Yes, I remember, very very unusual, shame, but I guess bad copy does slip-in occasionally...

Here are few test shots with this lens wide open, shot in raw, converted with Pentax supplied software, resized in CS2/3, all settings at "O" and no post sharpening (all at f2.8 ISO 800, full exif should be intact):


Regards,
D
Nice, Very nice!!! and awesome Bokeh!
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