Obviously, the image stabilization (IS) technology and a few other bells and whistles, including a focus range limiting switch. This is great and something very unique to Sigma – neither Nikon, nor Canon allow this much customization on their lines of lenses. The ring turns 180 degrees through its focus range, providing excellent tactile resistance for manual focusing operations: it's nicely cammed, and very smooth. In terms of glass construction, the new 120-300mm lens is similar to the old model with 23 elements in 18 groups with a large front element needing a 105mm filter. You can change this behavior with a USB dock and set one of the custom modes on the lens to speed priority, in which case the speed of the lens will greatly increase, but the accuracy will drop.

Sigma UK APO compatibility chart – Sigma UK

Most prime (single focal length) telephoto lenses can accept and work well with teleconverters to extend their reach, but at the expense of shutter speed due to the smaller effective aperture when a teleconverter is employed. Because your shoulders, elbows and neck are you means of income and you want to protect them from injuries. This very usefully includes built-in Vibration Reduction, activated by the OS switch on the lens barrel, which offers around 4 stops of compensation. In terms of image and construction quality, in my opinion little or nothing at all is sacrificed by going the Sigma 300/2. and 2X teleconverters for the EX series of lenses and this is where some differences to the Canon equipment became apparent.

This lens uses a convenient system for rotating drop-in filters: there is a thin ring with ridges next to the filter holder that rotates a small gear in the lens, which meshes with a gear on the filter holder to rotate the filter.

Lens reviews update: the Sigma 120-300mm F2.8, and Nikon Lens reviews update: the Sigma 120-300mm F2.8, and Nikon

Finally, at 300mm, we don't see as sharp an image as we saw at the other focal lengths when shooting wide open. It's likely that no further discussion is required, in which case we recommend starting a new thread. blur units in a small central region of the frame by ƒ/8, and maintaining 2 blur units into the corner regions.as that is certainly not latest generation those are much heavier then those of today, but 120-300 you don’t have a particular strong case unless you believe Nikon made an older design after they already started making newer designs, which is contradicting its optical performance. When you shoot events lasting hours regularly with heavy glass you prioritize your own health over showing off. G Master OSS, both of which we’ve found to be incredibly fast and sharp, as is to be expected from Sony’s high-end G Master lineup.

Lens Review - Sigma 300/2.8 HSM EX

I placed my combo on a tripod and it revealed a pretty good alignment where I didn't seem to need to adjust anything with autofocus fine tune. I have not tried the lens myself but reports indicate that is VERY close to the Canons at the center of the image, the AF is one of Sigmas best and it takes the (Canon) extenders well. While hand holding this lens is not impossible, it's large and heavy, and using a monopod (at least) is highly recommended if you plan on shooting for any length of time. DG OS HSM Sport, a high-end super-telephoto lens with a versatile zoom range and a wide constant aperture of f/2.

It is a shame Pentax has let there market share drop to a point where it is just not practical to own there product.

Sigma 300mm f/2.8 EX DG HSM APO - Digital Cameras, Digital

Mounted on a Canon EOS 1n, the focus locks onto the subject with authority, with no hunting or back-and-forth fine-tuning. While a 300 f/4 lens with a matched 2X teleconverter will yield a 600mm focal length with acceptable image quality, the effective aperture of f/8 makes the viewfinder dark, shutter speeds long and autofocus in most camera systems slow or inoperative. Compared to the previous version, Sigma states that this model is dust and splash-proof, but not fully waterproof – more like "weather-sealed. With its smooth turning tripod collar and focusing ring, easy-to-use filter holder and excellent autofocus performance (with or without teleconverters), the Sigma 300/2.

for years, and I have had longer and heavier lenses too, so you don't need to lecture me about carrying and using such gear. You can bet that something in a body, mount or similar will change making your investment obsolete in a Sony. photography-lover: Common sense and experience tell a user what can be done with the lenses she/he owns. I noticed this when I was out in the field shooting and was scratching my head wondering how it was that I had never noticed this problem with my Nikon 200-400 f/4G VR. When shooting wildlife or sports where things are happening quickly, I can imagine a situation, where I will miss a shot because I focused in the wrong direction and by the time I corrected, the moment had passed.