I series of lenses in all their distinctiveness. The 90 millimeter f 2.8 dg dnc its an auto focus, full frame lens for sony e mount cameras and also l, mount minimalist cameras and id like to thank sigma uk for providing a copy of this lens for testing. Although, as usual, this is a totally independent review, its price is going to be 550 pounds in the uk for the price in us dollars. Take a look down in the description about 40 years ago. Short telephoto lenses, with only a moderate maximum aperture of f 2.8. Were somewhat popular, they were small and affordable, and in a time when everyone was still having to manually focus, a telephoto lens with a brighter aperture than f 2.8 would have been tricky to handle. But manufacturing technology and accurate autofocus systems meant that brighter lenses, like classic 85 millimeter f 1.8 models became more commonly used. So this 90 millimeter f 2.8 lens feels a little bit like a blast from the past, but actually the advantages of keeping the maximum aperture a little darker are still there. They can be a little less expensive, theyre, sometimes a little sharper, but most immediately obvious in this case is that the lens will be much smaller and this one certainly is, and while a maximum matcher of any f 2.8 will hardly blow your background into an oblivion. This lens will still give you a strong emphasis on your subject, so lets get stuck in and take a close look at it build quality first, like other lenses in the series from sigma.

Its build quality is something to behold. These really are some of the best designed and manufactured auto focus lenses. You can buy today its nice and small and not very heavy, but the body is made entirely of metal tightly assembled with a nice brushed finish. The rear mount is made of metal and features a weather sealing gasket. The first control point is an aperture ring which clicks around very satisfyingly and with a good firmness, so you wont accidentally change your aperture. Very often, we also get an auto manual focus switch and a manual focus ring that turns incredibly smoothly and responds very precisely to being turned. This lens does not seem to exhibit much focus breathing, which is a nice little bonus for video makers. The lenses autofocus motor works reasonably quickly, silently and accurately, as i was shooting in a slightly darker situation. The camera sometimes sent the autofocus the wrong way, but it snaps back into place quite quickly, as well as a normal plastic lens cap. It also comes with something sigma have been working on a magnetic lens cap that attaches itself right onto the front. A magnetic lens cap holder is available separately, which you can attach to your camera bag or somewhere else about your person. Goodness knows if this idea of sigmas will ever catch on, but theyre certainly sticking with it. The lens also comes with a high quality metallic hood, which clips very firmly into position and looks the business its filter thread.

Size is 55 millimeters wide and it does not have image stabilization overall. The build quality of this particular lens really is on another level, its rather rigid design, aesthetic might not be to everyones taste, although personally, i think it looks cool but theres. No denying that handling this thing is a huge pleasure and i especially like its compact size. Much more important, though, comes image. Quality lets start by mounting it onto a full frame camera. My 42 megapixel sony, a7r iii in camera. Corrections are turned on here in the middle of the image straight from f 2.8. The lens is razor sharp, with excellent contrast. Lets look over in the corners, they are virtually a sharp. Actually, this is great. This lens might not have the brightest aperture in the world, but at least its fantastically sharp the lens stays. This sharp down to f11, where the effects of diffraction begin to soften the image a little and reduce contrast, stop down to f16 or darker and softness gets worse. But overall, this is essentially perfect. Image. Quality lets take a look at the performance on an aps c camera now by mounting it onto my 24 megapixel sony a5100. No need for much chitta chat for me here. The image quality continues to be absolutely perfect from the middle and into the corners straight from f, 2.8 spectacular. Once again, the lens stays this sharp down to f11. So nothing more to say here really, no matter what camera you use or aperture.

You shoot at this lenses image. Quality is magnificent. Now lets turn off in camera corrections and see about distortion and vignetting. Manufacturers nowadays tend to leave these to be corrected by your camera, to make the lenses themselves a bit smaller and simpler and thats clearly been the case here. Just look at all that pin cushion distortion and vignetting at f 2.8, stop down to f4 f, 5.6 and f 8 to see corner brightness, improving so definitely leave. Those in camera. Corrections turned on now lets take a look at close up image quality. The lenses minimum focus distance is 50 centimeters, which is quite a bit closer than normal for a short telephoto lens. Less impressive is the close up image quality at f 2.8, which becomes badly washed out stop down to f4 and contrast begins to return, but were still seeing a lot of blue color flinching its only at 5.6 that sharpness and contrast become excellent. Again, lets see how well the lens works against bright lights, its just an average performance here. Really there is flaring and glaring to be seen when bright lights are directly in the picture and a bit of glaring when bright lights are just off the picture too. Finally, lets look at this lenses. Bokeh no problems here at all those outer focus backgrounds, look lovely and soft to me in virtually every situation, autofocus points of light have a slight cat size shape to them in the image corners, which generates a slightly swirly effect when shooting on a full frame camera At f 2.

8, which many people find desirable and connected to bokeh is longitudinal chromatic aberration at f 2.8, its very strong here, as you can see its still there at f, 4 and f 5.6, but at f 8, its finally gone overall. This lens is small, very nicely made and incredibly sharp when shooting at normal distances. It also has lovely quality bokeh. It has one or two image quality problems, though most notably close up image quality, some wild distortion when images are not corrected and not a very good performance against bright lights. A 90 millimeter lens with an aperture of any f 2.8 feels a bit like the answer to a question that no one asked and its price is on the high side, but this is still a very nice optic indeed. So if you are wanting a sharp portrait lens, which is also lovely and small, then it comes recommended thanks for watching. I hope you enjoyed this video testing. Lenses like this is a huge, huge pleasure, but its also very challenging and time consuming. If youd like to support this channel, then check out my link to my patreon page down in the description below there. Youll find all kinds of exclusive content and videos for supporters.

https://www.youtube.com/watch?v=vUn0QSa5lhU