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11-14-2011, 07:00 PM   #16
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QuoteOriginally posted by pcarfan Quote
in my case at f2.8 it gets faster shutter than my other lenses like it's letting in more light than others.
You're saying that your Tamron 17-50mm allows a faster shutter speed at 2.8 than your other lenses do at 2.8? In that case, yours has the opposite problem of mine. Whereas I had a Tamron 17-50mm f3.3, maybe you have a Tamron 17-50mm f2.5.

11-15-2011, 08:23 AM   #17
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thank you guys for your opinions. if there are many cons, i will stay with my prime lens at the moment.
11-15-2011, 09:32 AM   #18
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You can always have both pending budget

I'm a prime person but still have the tammy as there are always times where zooms are much more practical to use

It's a big step up on the kit lens
11-15-2011, 10:34 AM   #19
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If you're after 28mm, why not consider the Tamron 28-75mm f2.8? It's almost universally well-regarded for its image quality on APS-C and makes an excellent walk-around lens. It's the lens I use almost exclusively in my studio. Sharpness is already good at f/2.8 and is outstanding across the frame when stepped down. And on top of everything else, it's inexpensive and easy to obtain.

11-16-2011, 01:47 PM   #20
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Tamron 28-75mm f2.8. good point. "It's the lens I use almost exclusively in my studio" i thought for studio work only the primes are the pro solutions. if you say this lens is working just fine, i surely want to try it. am working on it
11-16-2011, 01:51 PM   #21
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QuoteOriginally posted by piskota Quote
"It's the lens I use almost exclusively in my studio"
I can't speak for the pros, but I find the flexibility of a zoom to be very useful when shooting people in the studio. Especially in situations where you're down on the ground on your butt or kneeling (or even laying prone) when shooting children. Without moving, you can zoom out for a body shot, or zoom in for a head & shoulders shot. There's also less chance of tripping over a wire or knocking down a light, as could happen when "zooming with your feet".
11-16-2011, 02:59 PM   #22
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QuoteOriginally posted by piskota Quote
Tamron 28-75mm f2.8. good point. "It's the lens I use almost exclusively in my studio" i thought for studio work only the primes are the pro solutions. if you say this lens is working just fine, i surely want to try it. am working on it
I had the Tamron 28-75/2.8 as well. It still needed AF calibration but the Tamron 28-75 is better than the F28/2.8.
11-17-2011, 01:04 AM   #23
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i heard that the tamron 28-75 is too soft in the 28-35mm range. and maybe too sharp in the 5o-75mm area. it is ture? thanks.

11-17-2011, 06:18 AM   #24
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Be careful too with the 28-75, I went through two copies that had terrible IQ (not mis-focused, just really, really soft) wide open, and not much better stopped down. I got a 17-50 which has great IQ but mis-focuses quite often & has exposure accuracy problems, which are sometimes extreme.

I would recommend some critical testing with any new lens, especially if itīs AF.
11-17-2011, 03:51 PM   #25
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QuoteOriginally posted by piskota Quote
i heard that the tamron 28-75 is too soft in the 28-35mm range. and maybe too sharp in the 5o-75mm area. it is ture? thanks.
I wouldn't say it was too soft, it was a sharp as the F28/2.8. Again with Tamron you may have to go through some copies.

I compared the FA*28-70 to Tamron here

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/101965-pentax-...-2-8-50mm.html

The FA* was slightly sharper in those rnages but the Tamron was significantly sharper at 70. I kept the FA* which to me seem to render better and slightley sharper at infinity focus and the AF is always spot on and just like the images it produced better.

Last edited by pcarfan; 11-17-2011 at 03:57 PM.
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