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Introduction
The Sigma 90mm F2.8 DG DN is a quick, short-telephoto prime lens for Sony Alpha full-frame and APS-C E-mount mirrorless cameras, the place it gives a 135mm equal focal size. It is also out there for Leica / Panasonic / Sigma L-mount cameras.This new lens is a part of the Sigma I collection of compact, high-performance, impeccably constructed primes for mirrorless digicam programs, which boast a premium all-metal weather-sealed building, a magnetic steel lens cap and a steel lens hood.The Sigma 90mm F2.8 for Sony was launched in September 2021, becoming a member of the Sigma 24mm F3.5 DG DN, 35mm F2.8 DG DN, 65mm F2.8 DG DN and 45mm F2.8 DG DN lenses in addition to the brand new 24mm F2 DG DN that we have just lately reviewed.It options 11 parts in 10 teams, with one aspherical ingredient and 5 particular low dispersion parts to scale back chromatic aberrations and colour fringing.There is a Tremendous Multi-Layer Coating to reduce inner reflections in order that flare and ghosting don’t happen.This lens boasts a dust- and splash-proof construction and has a minimal focusing distance of 50cm / 19.7in. with a most magnification of 0.2x.It has a rounded 9-blade diaphragm which creates a pretty blur to out-of-focus areas of the picture and an inner focusing mechanism which suggests the lens barrel does not transfer.There’s a stepping motor for quick, quiet and exact auto-focusing, whereas the focusing ring gives superb guide focus management.A conventional aperture ring runs from f/2.8 to f/22 in third-stop increments with an Auto setting additionally out there for camera-based aperture choice.The Sigma 90mm F2.8 DG DN lens is accessible now priced at £549 / $639 within the UK and USA, respectively.
Ease of Use
Weighing in at 295g and measuring 64mm × 61.7mm, the all-metal bodied Sigma 24mm F2 DG DN is each extremely mild and extremely small for a 90mm full-frame lens.
Its general dimension may be very well-suited to a digicam just like the Sony A7 III that we examined it with, as proven within the product images.
Even with the equipped hood hooked up, it’s nonetheless amazingly discrete for a 90mm lens.
Most 90mm optics are normally specialist macro lenses, such because the Sony FE 90mm F2.8 Macro G OSS, which is over twice the burden and size than this Sigma 90mm.
While you do not get the identical macro capabilities with the Sigma 90mm F2.8 DG DN, having such a protracted focal size in such a small package deal makes it fairly distinctive, no imply feat in what’s now a really mature digicam system with numerous avaulable lenses.
Construct high quality is solely very good, far exceeding what you may anticipate from a mid-range, f/2.8 prime.
Sigma have actually gone to city on the brand new I collection, a lot in order that they’ve defined in nice element simply how a lot thought has gone into it.
It incorporates a brass bayonet mount that is supposedly extra sturdy than a traditional steel mount.
A rubber seal is integrated into the lens mount’s design to make it dust- and splash-resistant.
The Sigma 90mm F2.8 DG DN lens has a steel lens mount and it accepts widespread 55mm filters by way of steel threads on the entrance of the lens.
The lens does not characteristic built-in optical picture stabilisation, relying as a substitute on the digicam physique’s stabilisation system.
The Sigma 90mm F2.8 DG DN lens has a generously large, ridged motor-assisted focus ring that may be very properly damped. Handbook focusing is feasible by utilizing the main target mode change to toggle between AF and MF.
There aren’t any arduous stops at both finish of the vary, making it slightly tougher to set focus at infinity. Polariser customers must be happy that the 55mm filter thread does not rotate on focus.
The Sigma 90mm F2.8 DG DN lens utilises a stepping motor which produces quiet, however not silent, clean focusing, making it pretty well-suited to taking pictures each stills and video, with the general lens size remaining fixed throughout focusing.
With regards to auto-focusing, it proved to be a fast performer on the Sony A7R III digicam that we examined it with.
We did not expertise very a lot “looking”, both in good or dangerous mild, with the lens precisely focusing nearly all the time.
Sony’s close to flawless Eye AF works completely with this lens, shortly locking onto and monitoring the topic’s eye regardless of the wide-angle view, and it totally helps Sony’s DMF and AF+MF taking pictures modes.
The Sigma 90mm F2.8 DG DN lens options an aperture ring that has 1/3EV stops starting from f/2.8 to f/22 and an Auto setting should you choose to set the aperture by way of the digicam physique.
Sadly there is not any Click on change on the lens barrel that allows you to de-click it for silent operation throughout film recording.
The Sigma 90mm F2.8 DG DN lens is not equipped with a lens case, nevertheless it does include an excellent high quality, hybrid plastic and steel, round lens hood (LH576-02) that continues the ribbed texture of the lens barrel, and likewise an modern magnetic steel lens cap (LCF62-01M), along with a traditional plastic cap.
This devoted steel cap clips to the entrance floor of the lens magnetically, and there is even an optionally available magnetic steel lens cap holder (CH-11) that may be clipped to a bag or a belt.
Notice that the magnetic lens cap cannot be used with filters and is kind of awkward to make use of when the lens hood is fitted.
Focal Vary
The 90mm focal size gives an angle of view of 27.0 levels on a 35mm full-frame digicam.
Chromatic Aberrations
Chromatic aberrations, sometimes seen as blue or purple fringes alongside contrasty edges, weren’t very obvious in our take a look at photographs, solely showing in very excessive distinction areas. The instance under present the worst-case state of affairs.
Mild Fall-off
With the lens set to its most aperture of f/2.8, there may be some mild fall-off within the corners, requiring you to cease down by a minimum of 3 f-stops to fully forestall it.
Distortion
There’s little or no distortion evident within the JPG information – the Sony Alpha A7 III robotically and efficiently applies corrections to them – however the Uncooked file suffers from numerous pincushion distortion that you’re going to have to appropriate in post-processing.
JPEG
Uncooked
Sunstars
The Sigma 90mm F2.8 DG DN is able to producing fairly good sunstars when stopped-down to f/16 or f/22, as proven under.
The lens is slightly vulnerable to flare when taking pictures straight into the solar, although, even with the equipped lens hood fitted.
Macro
The Sigma 90mm F2.8 DG DN is not claimed to be a macro lens, nevertheless it does provide a minimal focusing distance of 50cm / 19.7in. with a most magnification of 0.2x. The next examples show how shut you may get to your topic.
Bokeh
Bokeh is a phrase used for the out-of-focus areas of {a photograph}, and is normally described in qualitative phrases, equivalent to clean / creamy / harsh and so on.
Within the 90mm F2.8 DG DN lens, Sigma have employed an iris diaphragm with 9 rounded blades, which has resulted in very interesting bokeh for a brief telephoto lens.
We do realise, nevertheless, that bokeh analysis is subjective, so we have included a number of examples under on your perusal.
Sharpness
With the intention to present you ways sharp this lens is, we’re offering 100% crops on the next web page.
Subsequent Web page
Sharpness: 1 »
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