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By Vashistha, on May 20th, 2016
Canon 1dx mark 2 showing issues when paired with some specific Sigma ART lenses. The problem is not uncommon, according to the SLRlouge website who found the fix of the issue also added the problem was arising in Sigma 35mm ART and Sigma 85mm ART Lenses.
Why and when the problem occur ?
When you pair sigma lenses with your 1DX Mk2 camera you will notice some circular bands in your images, these unwanted circular bands appear due to the Auto Lens Aberration Correction algo inside the camera, the Lens Aberration Correction algorithm automatically corrects images when you capture a image with particular Canon lens. But Canon DSLRs automatically trun-off Aberration Correction when they spot a third-party lenses, unfortunately Canon 1DX Mark2 applying same Aberration Correction filter to Sigma 35mm and 85mm lens. Hence to avoid the issue you must follow these steps.
To Fix of the issue
The fix of the problem is very simple
- Locate the Lens Aberration Correction setting in the first menu on the 1DX MK II, and enter its sub-menu.
- Switch Peripheral Illum Corr to OFF
Do share you thoughts with us.
Also take a look at Nikon D5 vs Canon 1DX Mk2 Camera High ISO Test and Specification comparison
Source (news and image) – slrlounge.com and Resource Mag
By admin, on March 28th, 2016
A new Sigma ART 24-70mm F2.8 lens patent surfaced over the web, The lens will arrive for Fullframe sensor based DSLRs. We may see some big announcements from Sigma on Photokina 2016 as we have told you earlier.
Patent Details Below
Patent Publication No. 2016-38502
Published 2016.3.22
Filing date 2014.8.8
Example
Zoom ratio 2.74
Wide-angle intermediate telephoto
Focal length 24.85 50.00 68.00
F-number 2.92 2.92 2.93
Full angle of view 2ω 83.71 45.71 34.33
The image height Y 21.63 21.63 21.63
The total lens length 150.73 167.12 178.30
source – bit.ly/22Gpbuh
By admin, on December 15th, 2015
 Sigma latest patent surfaced over the web that shows a 11-22mm ART lens patent, but surprisingly the lens features variable aperture being a ART lens.
Description, self-interpretation of the patent literature
- Patent Publication No. 2015-203734
- Published 2015.11.16
- Filing date 2014.4.11
- Example 1
- Zoom ratio 1.88
- Wide-angle intermediate telephoto
- Focal length 11.33 15.33 21.30
- F-number 4.50 5.00 5.86
- Total angle of view 2ω 126.85 108.80 87.93
- Image height Y 21.63 21.63 21.63
- Overall length of the lens 163.42 156.24 156.59
See more Sigma Patents
By admin, on November 29th, 2015
Sigma 20mm ART lens is new and world first lens that supports MAX F1.4 aperture while having a ultra wide range of 20mm, sure its wide aperture will add more fuel to your creativity.
Recently roger cala of lens rentals .com published a very informative review of the same.
The bottom line here is pretty obvious. Despite being a wider field of view, the Sigma 20mm f/1.4 clearly has a higher resolution than either the Canon or Nikon 24mm f/1.4 lenses do in the center half of the image, and are at least the equal of the others in the outer half. That’s just flat amazing…
Click here to buy the Sigma 20mm F1.4 from Amazon | Sigma 20mm F1.4 for Canon | Nikon from B&H
By admin, on October 25th, 2015
A bunch of Sigma high quality Lenses are expected to arrive soon, The Sigma ART lenses are already dominating the third party Lens market. Now take a look at the list of Sigma upcoming lenses
- Sigma 85mm F1.4 ART Lens – The lens will exclusively will arrive for portrait shooter some time in 2016.
- Sigma 24-70 F2.8 ART OS – The 24-70mm ultra-bright lenses are one of the most popular lenses among Cannikon users, the arrival of Sigma made monster in 24-70mm category will sure decelerate Sales speed of Canon EF 24-70mm f/2.8L II USM & Nikon AF-S NIKKOR 24-70mm f/2.8E ED VR lenses.
- Sigma 70-200 f/2.8 OS Sport – The lens is coming in 2016 with very fast AF that will sure attract professional shooters. The lens will arrive in
The website also said the Sigma is currently working on 12 lenses and they are ready to introduce new series of Wide angle prime lenses and new super-telephoto lens is also coming in next 2 to 3 years.
However we have already published detailed specification of the upcoming lenses here
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via – Canon Rumor
By admin, on July 17th, 2015
Finally Sigma announced the new ART lens for fullframe camera sensor, the lens features constant F2 aperture throughout out the zoom range, as said by Sigma the 24-35mm lens will do work of three prime lenses (24mm, 28mm and 35mm ), the lens features advance optics, upgraded overall design and improved AF algorithm to achieve fast and continuous auto focus. The lens will be available in Sigma, Canon and Nikon mounts. Timing, pricing and availability will be announced at a later date.
Continue reading Sigma 24-35mm F2 DG HSM Art lens US Pricing Announced
By admin, on June 19th, 2015
Sigma finally announced the fullframe 24-35mm F2 ART Lens for Fullframe cameras, the lens actually covers three need of three prime lenses, that includes 24mm, 28mm and 35mm, Sigma also adopted finest optics available and latest technologies in the recently announced FF lens, you get fixed F2 aperture through out the zoom range and lens incorporates large-diameter aspherical lens elements, which require advanced technologies to manufacture, one FLD glass and seven SLD (Special Low Dispersion) glass elements, of which two are aspherical lenses. The advanced optics and optimized lens power distribution minimize spherical aberration, axial chromatic aberration and field curvature, resulting in outstanding optical performance. Even at widest aperture, this lens delivers breathtaking image quality.
Continue reading SIGMA 24-35mm F2 DG HSM ART Lens for Fullframe Camera Announced
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