Originally posted by augustmoon I got the Sigma 24-60 last week (the Amazon-Cameta $220 deal, that I couldn't pass up)
I have the DA*50-135 and wanted a companion zoom for it (if just that DA* started off at 28 or even 30, I'd never take it off except to take headshots with the FA 77). I'll probably get the DA*16-50 in a couple months, or maybe the Pentax 17-70, depending on what kind of IQ the 17-70 turns out.
I was thinking about getting the Tamron 28-75 for the meantime as the 50-135 starts out a bit long for a walk around lens, and is a bit large for one as well, so I borrowed a Tamron 28-75 and took some test shots with it. At the same time I returned the Tamron 28-75, I then borrowed the 24-70 from Sigma and much preferred the Tamron over the Sigma 24-70. I liked the Tamron lens, and found it to be sharp and have pleasing color and contrast, but from 50-75, the Pentax DA*50-135 beat it out with no question, so for $350 just to cover 28-50, I decided to pass on the Tamron, and just wait to get what I could eventually get better use out of. (The DA*50-135 has spoiled me with the K20D) My coworker has a good copy of the 16-50, and after using it, I know i will eventually get one.
But when I saw this deal on the Sigma, I couldn't resist. It was a bit wider and much cheaper for the meantime, I figured that only $220 for 24-50 was a justifiable interim solution. I would say that I found the Tamron to be sharper than the Sigma, and the Sigma has a slight yellow cast, which is only slightly perceptible to me when i am fine tuning the white balance in Lightroom, but is more noticeable right away I am shooting the exact same scene with this and either my 18-55 II kit lens or the DA*50-135, or my primes. (this is with the same color temp dialed in) but I adjust my color temp to my liking when working with the raw files anyway, so not a big deal, just strange. Still doesn't match up to the DA*50-135. But a noticable improvement over the 18-55 mark II kit lens. And it focuses better (finds a lock faster) than the kit lens (but the Sigma is 2.8). I liked this 24-60 over the Sigma 24-70 I tried for a few days, as the 24-70 did not look to be as sharp as the 24-60 and the Sigma yellow tint was more apparent with the 24-70.
A bit soft at 2.8, but no more so than any other zoom I have ever used. It gets sharper as it is stopped down to f/5.6 to my aging pixel peeping pupils.
So for the price I think it is a really good deal. It is actually an extremely good deal if the Focal Length Range is a good fit with you.
I had it with me yesterday at work, and at lunch I walked down to the waterfront here in San Diego, and they were practicing for the Red Bull Air Races. I didn't know they were practicing on Friday!, so I was cursing myself for not having the 50-135 with me as the 24-60 was just a bit short for the task.
You are right about the slight yellow in certain light conditions. I shoot raw only so it is easily fixed. As for cost it is a good deal for the money. I compared images with DA 16-45 and result at the same aperture, F4 and up, gave me very similar sharpness, color slightly different as expected as lens construction is not similar.
Overall it is a decent lens, more use needed to fit this lens in a specific category. Took it out last night and managed some decent photos in very low light conditions.
I have the impression this lens was passed by many due to its range.
Many opted for the 28 to 70 or 75 range instead. I would not be surprised if Sigma drops it due to low interest. Many found comments have rated the sharpness better than the 24-70 or 28-70 which can make it a lens to own. The Tamron 28-75 is highly rated but only if you find a good one. The price, $500cdn around here, makes it to high for me to consider.