TAMRON 28-75mm F2.8 RXD A036SF Lens for Sony-FE

Product Information

Since I am most often using Canon lenses, I personally find the reverse-direction-rotating zoom ring to be awkward. Additionally, TAMRON has adopted a new design with improved ergonomics and revised the coating of the lens exterior to improve scratch resistance. The filter size is 67mm, which is standard among TAMRON’s fast-aperture zoom lens series and enables the sharing of lens caps, filters, and other accessories. I have not tested the Tamron 28-75/2.8, but it seems like exactly the same lens for half the price. Autofocus is via a motor in the lens. As the lens focuses, the focus ring turns. It is not silent; the little motor sounds like a kid's toy. In most cases I can admit that I think in that exact way, but I have to say that based on my experiences with the Tamron 28-75mm f/2.8, I feel as though it’s not that way at all.

Pursue a wide range of photography with a lineup of lenses that all have the same 67mm filter diameter We are a little concerned that this port is uncovered, although Tamron state that it is fully water-proofed and therefore that a cover is not necessary. Maybe because it's an obsolete Tamron lens not as much was done to hide the issue, but normally when these hijinks are played each maker will show the internal lens construction diagram with the lens set to a different focal length, which changes the positions of the elements to hide the stain of all this.This covers the basic focal lengths desired in a normal general purpose zoom lens but might feel long to some 1.6x FOVCF users.

This lens uses the very latest VXD linear motor focus mechanism for fast, quiet and precise auto-focusing, and full-time manual focus override is also possible. There's a new Focus Control button and Connector Port and it has a moisture-sealed construction which has gaskets covering all the moving areas of the lens (focus, zoom ring etc as well as a gasket on the mount). Lens performance differs depending upon directions. Solid lines show performance in the sagittal (radial) direction while dotted lines indicate performance in the meridional (circumferential) direction. When sharp lenses capable of delivering uniform optical performance over the entire image field are tested, MTF charts show curves plotted in good balance. Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.Compared to the silver-coloured plastic on the Sony FE 24-70mm f/4 ZA OSS Vario-Tessar Carl Zeiss T*, you get a more robust metal mount on this zoom. Handling wise, it feels neither to big nor too small and rests comfortably in the average size palm when a little extra support is required beneath. Crop from above image at f/11. If this is 6" wide on your screen, the complete image printed at this same magnification would be 40 x 60." (1 x 1.5 meters.) There is no instant manual focus override. You have to move a switch on the lens. You can't even select manual focus on the Sony A99, which grays-out the manual and DMF ("Direct Manual Focus") override modes.

It’s not unusual for standard zoom lenses to exhibit barrel distortion at their widest setting. This zoom is no exception and our tests reveals prominent barrel distortion, whereby straight lines bow outwards towards the edge of the frame. By the time you reach 50mm barrel distortion turns to pincushion distortion. This becomes obvious in shots taken of straight lines and is accentuated slightly more at the furthest point in the zoom range. Tamron 28-75mm f/2.8 Di III RXD review: Verdict As you pull focus, you’ll notice very little focus breathing: When I adjusted the focus from infinity to 0.85m at 75mm focal length, I measured a 2% increase in magnification. This is hardly noticeable. Same at 28mm focal length. Size (diameter x length): at 76 x 118mm (3.0 x 4.6in.) plus 28mm for the lens hood (87mm diameter) the Tamron is quite slim. The Sigma is 88 x 125mm, the Sony is 88 x 136mm, the Nikon and Canon are 89 x 126mm (all without lens hood). All lenses extend when zoomed to their longest focal length: The Tamron extends by 18mm, the Sigma 34mm, Sony 31mm, Nikon 30mm, Canon 23mm. [+] As demonstrated by the product images, it's a much better match for a more professional full-frame camera like the Sony A7 IV that we tested it with, where it just feels better balanced and more "at home". Better than any other brand, even if you're in AF-C and grab the manual-focus ring, it just swaps to manual focus instantly and stays in manual focus. Other brands will try to fight you for focus if you're in continuous AF, while this lens just does what you tell it to do. Bravo!

At f/2.8, the Sony 28-75 2.8 shows some spherochromatism at close distances, along with regular spherical aberration making things softer. Importantly, the lens is fully compatible with the "Direct Manual Focus (DMF)" system feature of Sony cameras that enables the user to instantly switch between autofocus and manual focus. Spherochromatism, sometimes mistakenly called "color bokeh" by laymen, is a minor aberration which can add slight color fringes to out-of focus highlights. It's a personal preference; I know all lenses today are as sharp as each other so I always choose the smallest and lightest. Actually, I still prefer my Z 24-200mm (and RF 24-240 and E 24-240) as my daily lenses — but that's just me. At 35mm, central sharpness is excellent from f/2.8 to f/4, outstanding at f/5.6, very good from f/8 to f/16 and good at f/22. The edges are very good at f/2.8, excellent at f/4 and f/5.6, very good from f/8 to f/16 and again dropping off to just fair at f/22.