- FOCUS PROBLEMS SIGMA 18 35 1.8 FULL
- FOCUS PROBLEMS SIGMA 18 35 1.8 ISO
- FOCUS PROBLEMS SIGMA 18 35 1.8 SERIES
Here is the review, in this paragraph from user Sigma77, who is a usual participant in our comments section: I bought the lens for the a6300 with an appropriate a-mount adapter. We got to the bottom of the matter and let this lens compete against our fixed focal lengths – Canon EF 50mm 1.8 and Canon EF 85mm 1.8 – which are also in our lens park. Whether the imaging performance is really as good as it is said in many forums remains to be seen. The scope of delivery is very extensive, so there is not only a front and back cap, but also a matching lens hood and a lens quiver, which is not uncommon in this price range. With the current street price of about 549,-€ (for Canon) it competes with our fixed focal lengths. The initial RRP of 999,-€ has already gone down a bit, which made it more and more attractive for hobby photographers from time to time. It has been developed for the APS-C market and for many photographers it is THE alternative par excellence. With the Sigma 18-35 mm F1.8 DC HSM Art, released in 2013, they have released a very fast zoom lens with a continuous aperture of f/1.8. on a much more expensive Canon 24mm/1.4 II.
FOCUS PROBLEMS SIGMA 18 35 1.8 FULL
But it can also be very interesting for full format models, as it vignettes only below 26mm and the marginal image performance is hardly weaker than e.g. The Sigma is calculated from the image circle for APS-C models such as the 7D Mark 2, 70D, 700D, 650D, 1200D etc.
FOCUS PROBLEMS SIGMA 18 35 1.8 SERIES
Sigma’s high-quality Art series offers the world’s fastest standard zoom lens (interchangeable lens) with the Sigma 18 – 35mm / 1.8 DC HSM Art.
More important, of course, is how the ambitious lens proves itself in practice. In terms of design with selective sharpness, this results in the effect of a continuous aperture of 2.8 compared to 35 mm focal lengths, which is currently unique.
FOCUS PROBLEMS SIGMA 18 35 1.8 ISO
It is therefore possible to work with low ISO values for large aperture openings and thus at least partially compensate for the quality advantage of cameras with sensors in 35 mm format. On the other hand, it is 2 to 3 f-stops brighter, so it lets four to eight times more light onto the sensor. In terms of focal length, the Sigma 1.8/18-35 mm on the CanonAPS-C sensor (bleed factor 1.6), designed exclusively for cameras with an APS-C sensor, is equivalent to 29-56 mm on the Canon APS-C sensor (bleed factor 1.6), and 27-53 mm on the other APS-C DSLRs (bleed factor 1.5), which is less than conventional standard zoom lenses. With a slightly spectacular focal length range but extreme light intensity, the voluminous standard lens opens up interesting possibilities for cameras with sensors in APS-C format. The Sigma 18-35 mm F/1.8 DC HSM is again such a unique thing. In recent years, Sigma has repeatedly presented lenses that deviated from the usual monotony with unusual focal lengths or light intensities. The new lens should also be able to be supplied with firmware updates via the USB dock. At 810 grams, the Sigma 18-35 mm F1.8 DC HSM is not exactly a lightweight. In addition to the lens hood, the Super Multi Layer coating should help to avoid reflections and ghost images. Filters can be attached via the 72 mm front thread, a tulip-shaped lens hood and a lens quiver should be included in the scope of delivery. The Hypersonic motor of the Sigma 18-35 ensures fast and quiet focusing at the same time. The closest focusing distance is 28 centimetres, which enables a maximum magnification of 1:4.3.īoth zoom adjustment and focusing are internal, so the lens does not change its length. The lens is composed of 17 elements in 12 groups, the nine aperture lamellas are intended to create a particularly round opening, which provides a softer bokeh. With such a fast zoom, the correction of imaging errors becomes a very special challenge, which Sigma wants to master with a self-developed, brightly pressed aspherical glass lens and the installation of SLD glass, which has a particularly low dispersion. The Sigma 18-35mm F1.8 DC HSM belongs to the new Art line of the Japanese optics specialist and should be able to replace several fixed focal lengths due to its high optical performance. Sigma currently expressly does not exclude others. In any case, the lens should come with connectors for Canon, Nikon and Sigma on the market. Sigma even sees the new powerful zoom as an alternative to several fixed focal lengths in the photo bag of the ambitious photographer. The focal length range should range from 18-35 millimeters, which corresponds to a 35mm equivalent of 27-53 millimeters for APS-C sensors. With a continuous speed of F1.8, Sigma is currently developing the fastest zoom lens for APS-C cameras with the Sigma 18-35. Sigma 18-35 mm F1.8 DC HSM Type Datasheet Sigma develops high-intensity wide-angle normal zoom for APS-C with the Sigma 18-35
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