Sharpness at f/8.0 of Sigma versus that of f/2.8 of Tamron at 70mm, has made changed my decision and rating on this lens. The sharpness of Sigma at this focal length is bad at f/2.8, and does not become comparable to that of Tamron until I stop it down to f/8.0. I tested the lens further vs Tamron 70-200mm f/2.8 This is where Sigma HSM shows its weakness. However, the great things were that IQ at 35mm and 50mm f/4, 5.6, and 8.0 was comparable to those of DA 35mm and Sigma 50mm, in term of sharpness, color saturation, and contrast.įYI, please take a look at pictures of my test at 50mm At 50mm, Sigma 50mm prime also gave better IQ than zoom lens does, with the same setting. I found DA 35mm gave image with more details, greater contrast, and as well as better color saturation. At 35mm, IQ was good, but not as good as DA 35mm. The zoom lens was set at 35mm and 50mm to take pictures at f/ 2.8, 4.0, 5.6, and 8.0. I did some test shots in order to compare its IQ to those of DA 35mm f/2.8 and Sigma 50mm f/1.4 primes. In the previous reviews, they stated that images taken with this zoom were sharp at wide open. I currently own Sigma 50mm f/1.4 with HSM, so the focusing speed of Sigma 24-70mm does not amaze me, just as fast as Sigma 50mm prime. The lens focuses extremely fast and accurate on K-5. The lens is great built, making the solid feeling, and looking really cool on my K-5, especially with battery grip attached. I recently bought Sigma 24-70mm f/2.8 HSM from BH. I owned Sigma 24-70mm f/2.8 Macro (no HSM version) before, but I sold it because it is too big, not comparable with my Pentax K-x. Maybe I got a bad copy of Tamron 17-50mm lens. Trying out Tamron 17-50mm, which gives worse IQ than Sigma 17-70mm does, makes me so disappointed. IQ is good, but not yet meet make me satisfied. I prefer using flash indoor, so I do not mind to shoot with a slow zoom such as Sigma 17-70mm, anyway, I always keep f values about 5.6 to 8.0. Therefore, I have been looking for a good zoom lens. I mainly shoot with primes, but I find it inconvenient sometimes when I shoot indoor. Sharpness: 7 Aberrations: 9 Bokeh: 9 Handling: 9 Value: 7 Autofocus: 10 New Or Used: New Not so sharp at f/2.8 (maybe I am too strict), bad IQ at 70mm,resell value Sharp from f/4, great zoom range, fast and accurate focus, good color saturation Sharp at F2, top lens! But you have been warned bokeh is ugly! The only real issue of the lens aside from it's weight is it's bokeh, it is just not nice! The speed and reliable autofocus is a positive, and the build quality is amazing, feels great to hold.Īlthough it is not weather sealed my GX20 is now only half water proof so to speak with this lens. This is my first lens after my initial kit lens, of course it is a massive difference but that don't mean I have to kiss it's ass, there are negatives to this lens too.įirstly I did get this lens for a steal $395, the cheapest from the rest of the reviews and I am sure plenty of other people before me! Brand new of course, but that was a one off steal in general the price is a negative, still can't get hold of it under $400! Sharpness: 8 Aberrations: 8 Bokeh: 7 Handling: 9 Value: 10 Autofocus: 7 New Or Used: New If I didn't have this tomorrow I'd replace it in kind. I was considering a 16-50 2.8 Pentax * but I decided against it because this came up used from a reputable dealer at a few hundred pounds sterling cheaper. It's bokeh could be better but I have realistically nothing to complain about.
I've used it for astro and it's done the job nicely too) The only real downside is that it can be a touch soft at 2.8 to 3.5 but I've used it at 3.5 with good enough results on print up to 10x8s. HSM is snappy enough for my needs (Portrait and kids photography and some landscape. It's what you expect from EX Glass, it's an absolute tank. This was my first non kit walk around lens and it's attatched to the camera unless I need longer reach.
SIGMA 24 70 2.8 IF EX DG UPGRADE
Had this lens four years now and got it to upgrade the superb DA SMC 18-55 3.5-4.5 that came with my now dead K100D. Sharpness: 9 Aberrations: 8 Bokeh: 8 Handling: 10 Value: 10 Camera Used: Pentax K7 Autofocus: 9 New Or Used: Used
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