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By admin, on February 3rd, 2017
Sigma 85mm F1.4 lens becomes the world most perfect lens ever build to date. The sigma 85mm F1.4 Lens features amazing optics that made it world no 1 during the test. The lens features bright F1.4 aperture and Hyper Sonic Motor for fastest AF support. for more you buying option can visit B&H store
 While looking at the score card we generally roll eyes to the sharpness score of any lens and after that we look at for Distortion, vignetting..etc. While looking at the score card of Sigma you can see that lens is even more sharper then Ultra Expensive Carl Zeiss Otus. But, At the same time we can’t ignore that Tamron SP 85mm F1.8 Sharpness score is also same as of Sigma 85mm F1.4, but it goes down in table due to bit more distortion and Chr. aberration.
By admin, on January 7th, 2017
 According to latest rumors the Sigma 24-70mm f/2.8 OS Art lens is expected to be announced sometime in February 2017. If such Lens announced by Sigma then for sure it will low down the sales graph of native 24-70mm F2.8 Cannikon lenses. As the information we have received a while ago that Canon is testing 24-70mm F2.8 IS Lenses. Still, the expected date of arrival is unknown. Whereas Nikon already have 24-70 F2.8 VR lens in it’s arsenal.
Also see – Canon .CR2 File Format Hacked and Decoded
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source
By admin, on October 24th, 2016
Sigma new 8mm F1.8 Fisheye lens patent surfaced over web for M4/3 system cameras. Take a look at the details below
Self-interpretation translated via gogle
Patent Publication No. 2016-184136
Published 2016.10.20
Filing date 2015.3.27
Example 7
INF 120mm
Focal length 7.90 7.60
F-number 1.82 1.83
Full angle of view 2ω 197.08 197.08
The image height Y 11.60 11.71
Sigma More Lens Patents
By admin, on August 8th, 2016
Sigma New Patent filed for ultra-wide 14mm APS-C Mirrorless camera, take a look at the patent details below
Patent Publication No. 2016-139087
Published 2016.8.4
Filing date 2015.1.29
Example 1
INF 200mm
Focal length 13.98 13.28
F-number 3.53 3.54
Full angle of view 2ω 90.74 92.90
The image height Y 14.20 14.20
Overall length of the lens 89.25 89.25
BF 17.5750
Lens configuration 8 groups 10 sheets
2 aspherical three sides
ED 1 ( sigma in ELD)
Fluorite 4 ( sigma in FLD)
Example 2
INF 200mm
Focal length 13.97 13.28
F-number 4.13 4.13
Full angle of view 2ω 90.90 92.68
The image height Y 14.20 14.20
Overall length of the lens 82.60 82.60
BF 17.6874
Lens configuration 8 groups 10 sheets
2 aspherical three sides
ED 1 ( sigma in ELD)
Fluorite 4 ( sigma in FLD)
Sigma patents
FumakeTadashi
Inner focus (the second group)
source – egami.blog.so-net.ne.jp
By admin, on June 27th, 2016
Sigma Finally in the mood to enter in the Cinema lens market, according to latest rumor coming from rumormill We may see Cinema Lenses from Sigma Soon. But the Big Question is when Sigma is ready to enter in the Cinema world ? at the moment we can expect to see development announcement of new products this September.
The Rumor is not New
The rumor is not new on July 18, 2014 In an interview to Resource Magazine Sigma CEO Kazuto Yamaki SILENCE hinted that they are working on Cinema Lenses
“How could one of the greatest innovators of lens technology in the world not be producing lenses for high-end digital video and motion picture cameras? With such high standards, cinematographers seem like a natural market for Sigma. When I asked Kazuto about this, he simply smiled and said the two words that make every tech writer crave more: “No comment.” It looks like Sigma may still has a few more tricks up their sleeve…”
We will update you soon as we get any new information.
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By Vashistha, on May 26th, 2016
Sigma is rumored to announce the 85 mm F1.4 art lens this September 2016 during the photokina event. According to the website photorumors the Sigma 85 MM 1.4 lens is currently being tested by the photographers around the world.
Not only 85 mm lens, we may seem new art lenses at the event to we can also get some development announcement from Signa regarding the same.
Stay with us and we will update you soon as we get any new information.
source – Canonrumors
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
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