High Photo Quality is Irrefutable Throughout the Unmitigated Zoom Range
This telephoto zoom integrates Sigma's original Optical Stabilizer (OS) function. It delivers available shutter speeds around 4 stops slower. There are three Special Low Dispersion (SLD) glass elements which provide superb correction of chromatic aberration. In addition the lens features a rear focus system which minimizes inconstancy of aberration created by focusing. It delivers optimum image quality all through the total zoom range. A multi-layer super coating diminishes flare and ghosting. High picture quality is Irrefutable all through the continuous zoom range.
The minimum focus distance of 59.1" through the total zoom range and there is a maximum magnification ratio of 1:4.2 allows it to be quite useful for taking close-up photos. This lens amalgamates Hyper Sonic Motor HSM), which ensures a and high-speed and quiet AF along with manual focusing ability full-time. The addition of an optical Sigma 1.4x EXDG APO or Sigma 2x EX DG APO Tele Converters will create a F6.3-8 168-560mm MF ultra-telephoto lens or a F9-11 240-800mm MF ultra-telephoto lens respectively.
The HSM simply means the lens can autofocus on entry level Nikon cameras.
Revisited Nov 9, 2014
• Incorporating Sigma's original OS (Optical Stabilizer) function.
• Three SLD glass elements and a rear focus system provide optimum image quality throughout the entire zoom range.
• Super multi-layer coating reduces flare and ghosting.
• The minimum focusing distance of 150cm (59.1") makes it useful for close-up photography.
• HSM ensures quiet and high-speed autofocus.
• Compatible with Sigma's APO Tele Converters.
Sigma 120-400mm F4.5-5.6 DG APO OS HSM Telephoto Zoom Lens Mount View
Best bargain in this zoom range, June 7, 2009
By I. Clements
I got this lens largely because it was on sale and I was thinking it would be a nice addition. I ended up returning it because realistically I don't have much use for a lens in this range and would rather spend the money elsewhere at the moment.
I did give it a thorough work out over a couple weekends and was quite impressed with it performance.
The OS works flawlessly and I was able to snap some very detailed shots of grounded geese while walking toward them using it hand-held. You could pick out the details in the feathers from 30 ft away easily.
The one downside, which should be obvious, is this is a very heavy lens. You aren't going to be able to carry this one around all day just on the off chance you'll need it. The tripod mount makes a very convenient hand grip, but at full zoom its just tricking to hold it long.
The HSM focusing is quiet fast and not too noisy, but I though the OS system relatively slow compared to Canon IS. One thing to really note is that you MUST NOT use the OS if you have the lens on a tripod. Without some shake to compensate against the OS system freaks out and you can see the image jumping all over the place. I made this mistake and ruined some good pictures but that isn't the lenses fault that was me.
I'd definitely recommend trying out this lens if you are thinking of the Canon 100-400 L series. Its about 40% cheaper and a very well made lens.
You really need to evaluate though if you truly need a lens like this as it it just too heavy just to have in your bag just in case.
My solution to my need was to go with a Tamron 70-200 F2.8 (which I love to death) and a Tamron 2x converter. With the converter on it gives me the equivalent of a 140-400 F4-5.6 lens for a lot less money and a lot less weight. I find this combo actually a bit faster than the Sigma.
The only thing missing is the OS but since you truly need a tripod for something in this range and since you can't use OS/IS with a tripod anyway I don't see that as a big loss.
Wonderful Lens, November 16, 2008
By Gaylon Wampler (Colorado, USA)
I'm a professional photographer[...] and until now, have never owned anything but Canon or Nikon lenses. For years I specialized in
sports photography and the lenses I most often used were a 400 f:2.8 and a 600 f:4. I moved on to other fields of specialty and decided I didn't want to lug around that kind of weight and got rid of the big glass. Now, several years later, I decided I needed a long lens again, but in a decidedly smaller package. After trying an unnamed top manufacturer's 80~400 lens and being unhappy with the quality of the image, I dared to try Sigma's new 120~400. I ran the lens through the ringer and tested it under every situation I could think of and through it all, it has performed flawlessly! In fact, I was ready to accept a little less sharpness, so when I evaluated my results, I was thrilled. I highly recommend this lens and I have the utmost confidence in this beautiful package of glass.
Thursday, 31 January 2008
APO 120-400mm F4.5-5.6 DG OS HSM
High ratio zoom lens housed in a compact construction and incorporating Sigma’s original OS (Optical Stabilizer) function.
The Sigma Corporation is pleased to announce the launch of the new APO 120-400mm F4.5-5.6 DG OS
Incorporating Sigma’s original OS (Optical Stabilizer) function.
Three SLD glass elements and a rear focus system provide optimum image quality throughout the entire zoom range.
Super multi-layer coating reduces flare and ghosting.
The minimum focusing distance of 150cm (59.1”) makes it useful for close-up photography.
HSM ensures quiet and high speed autofocus.
Compatible with Sigma’s APO Tele Converters.
This telephoto zoom lens incorporates Sigma’s original OS (Optical Stabilizer) function. It offers the equivalent of using a shutter speed approximately 4 stops faster. Three SLD (Special Low Dispersion) glass elements provide excellent correction for chromatic aberration. This lens is equipped with the rear focus system that minimizes fluctuation of aberration caused by focusing. It provides optimum image quality throughout the entire zoom range.
The super multi-layer lens coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. The minimum focusing distance of 150cm (59.1”) throughout the entire zoom range and has a maximum magnification of 1:4.2 make it useful for close-up photography. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focusing capability. The addition of the optical 1.4x EX DG APO or 2x EX DG APO Tele Converters produce a 168-560mm F6.3-8 MF ultra-telephoto zoom lens or a 240-800mm F9-11 MF ultra-telephoto zoom lens respectively.
*1 OS function is not available.
*2 If the camera body does not support HSM motor, AF does not work.