Sigma 30mm F1.4 DC DN Contemporary Micro Four Thirds Lens Review
|Sharpness||The Sigma, while a class-leader in the E-mount environment, has a tougher time shaking up the Micro Four Thirds order. Performance wide open is fairly on-par, with sharpness dropping only a bit towards the outer third of the frame. Stopping down sharpens the corners up a little and performance remains fairly consistent until diffraction starts to kick in beyond F5.6.|
|Chromatic Aberration||Wide-open the Sigma shows fairly consistent and correctable chromatic aberration. As the lens is stopped down, blue/yellow fringing (blue line) is reduced while cyan/red fringing increases. Overall, aberrations never get to the point where corrections will greatly effect sharpness.|
|Vignetting||Thanks to the lens' design being optimized for APS-C use, the central part of the frame used by a Micro Four Thirds sensor is much less affected by the lens' vignetting wide-open. It continues to improve on stopping down and by F2.8 there's hardly any left.|
|Distortion||The Sigma exudes a fair bit of barrel distortion, with its effects being most noticeable in the corners.|
Versus the Panasonic Leica Summilux DG 25mm F1.4
It is very close between these two lenses. Wide-open, the Panasonic does end up being sharper in the center all the way through the central third of the frame. However, as we move outwards, we see the sharpness of the Panasonic continues to trend downwards. The Sigma is much more consistent across the frame. That trend continues at F2, but by F2.8 the outer edges of the Panasonic have improved and surpassed the performance of the Sigma, and stays ahead as diffraction begins to lower overall sharpness of both lenses at F5.6 and beyond. So while the Sigma never beats the Panasonic, it offers a more consistent performance with sharper extremities at brighter apertures.
The Panasonic does struggle a bit with chromatic aberrations, showing a spike at the edge of the frame for both colors at all apertures. Performance near the center does seem to be consistently better than the Sigma, however.
Where the Sigma is able to pull ahead is in terms of vignetting and distortion. Vignetting hardly effects the Sigma, with only 1/3 stop of light lost at the very corners. The Panasonic, on the other hand, loses over a stop in the extremes, though it improves as soon as you stop the lens down. Both suffer from barrel distortion, but the amount the Panasonic deals with is much more than the Sigma, especially in the extremes.
It's worth noting that the Panasonic's distortion is automatically corrected when the lens is mounted on an Olympus or Panasonic camera and when it's processed with any compatible Raw converter, so we're more interested in the effect on sharpness in the corrected image.
|Brown Crown by Nilesh Trivedi|
from brown challenge
|D72_4852_DxO Smug by richpics|
from Aviation Legends: X-Planes
|Ancient Bristlecone Pine by ed rader|
from My Best Picture of the Week
|Everyone look at the camera by cjf2|
from Looking down the lens.
Sony's new 12-24mm F2.8 GM is the widest fast aperture zoom for full frame. Based on our tests it's a worthy recipient of Sony's 'GM' moniker.
Chris and Jordan took the new Sony 12-24mm F2.8 GM to Calgary's eclectic Ingelwood neighborhood. From record stores to spice shops, find out what got their attention when it was time to go wide.
The six prize-winning photographs and four honorable mentions were narrowed down from more than 6,000 entries captured across North America.
Though Thunderbolt 4 remains at 40Gb/s, its minimum requirements include dual 4K monitor support, faster external drive speeds and more.
You can now use compatible Fujifilm cameras with video conferencing software on macOS hardware without the need of a dedicated capture card.
The Epson V600 remains one of the most popular flatbed film scanners on the market. Revisit our review of this affordable and (mostly) easy-to-use option and see how its output compares to local lab scans.
Canon's mirrorless EOS R5 comes with a ton of features and capability stemming from its design inside and out. Come along with us on a guided tour of Canon's new high-end, high-megapixel camera and check it out for yourself.
Announced alongside the EOS R5, the R6 offers a lot of the same technology but in a more affordable, slightly more enthusiast-focused model. Take a closer look.
Alongside the EOS R5 and R6, Canon has announced a brace of lenses, all in the short to long telephoto range. Filling out the 'long' end are one L-series zoom, and two innovative primes.
Alongside a trio of telephoto lenses, Canon also announced a new 85mm this week. The RF 85mm F2 Macro IS STM is a compact, affordable alternative to the pro-oriented 85mm F1.2L.
The EOS R5 has been a long time coming – we knew it had 8K and we knew it had an AF joystick. But now that's it's here, what is it really like to use? Find out in our initial review based on hands-on time with the camera.
The R6 doesn't promise quite such headline-grabbing specs as its big brother, but it still packs a punch, whether you shoot stills, video or both.
Think you've read everything there is to know about the new Canon cameras? Chris and Jordan share eight important things you may have missed from today's Canon EOS R5 and R6 announcements.
We've been shooting around with the new Canon EOS R6. Initial impressions of image quality are positive, and out-of-camera JPEGs appear similar to that of the gold award-winning Canon EOS-1D X III. Have a look for yourself.
Canon has officially released the long-awaited EOS R5, the company's top-end full-frame mirrorless camera. Featuring a new 45MP CMOS sensor, Dual Pixel AF II system, 8K video capture and 20 fps bursts, this is the RF-mount camera we've been waiting for.
Although the Canon EOS R6 doesn't have the 45MP sensor and 8K video capture of the higher-end R5, it's still an incredibly capable camera with specs that outshine similarly priced peers.
The Canon RF 100-500mm F4.5-7.1L IS USM is the company's first super-zoom lens for RF-mount. Despite a relatively slow aperture range, it's very versatile, offering five stops of stabilization, weather-sealing and compatibility with Canon's new teleconverters.
Canon's RF 85mm F2 Macro IS STM is an inexpensive telephoto prime lens with a minimum focus distance of just 0.35m (14") and a 0.5x magnification. When attached to the new R5 and R6, it offers a whopping eight stops of shake reduction.
Canon has announced a pair of super-telephoto fixed-aperture primes. The 600mm and 800mm use diffractive optics to keep their size and weight down. They'll also be compatible with new 1.4x and 2x RF teleconverters.
Canon has announced a new small-footprint inkjet photo printer, the imageProGraf Pro-300. it will produce prints up to 13 x 19" and it goes on sale later this month for $900. A new textured photo paper will also arrive in July.
The new compression standard is set to reduce video file sizes by half to save space and speed-up transmission, paving the way for more portable 8K footage.
Sony recently confirmed plans to launch a successor to the video-centric a7S II. We don't even know the name of the camera, but Jordan already has a feature wish list for the new 'a7S III' – and it doesn't include 8K.
The Profot B10 is the first studio flash system that can be used when shooting with an iPhone camera.
The Pixii camera is an interesting little rangefinder camera that features a 12MP APS-C sensor and lacks a rear LCD display, opting instead to pair with your mobile device, which can be used to view and transfer images.
Sirui is launching an Indiegogo campaign for a wide-angle answer to its existing 50mm F1.8 anamorphic lens. The 35mm APS-C lens will come in a Micro Four Thirds mount with adapters for other systems.
Sony has added a 12-24mm F2.8 to its top-shelf 'G Master' series of lenses. It's the widest constant F2.8 zoom currently offered for full-frame, with a hefty price tag to match: it will sell for $3000 when it ships in mid-August.
Take a look at the view from Sony's new ultra-wide F2.8 zoom – we paired it with the a7R IV for some initial shooting.
Canon's EOS-1D X Mark III is one of the best DSLRs ever made. With fast burst speeds, great video quality and impressive autofocus, the 1D X III is equal parts cinema rig and sports shooter. Find out how it fares against steep competition in our full review.
Nikon Rumors is reporting that Nikon will announce successors to its Z6 and Z7 camera systems by the end of the calendar year.
Canon says the event, set to take place at 14:00 CEST in two days on July 9, will be its 'biggest product launch yet.'