Sigma Corporation of America to Release Two MTF Charts for Measurement of Lenses
Company releases the data of Geometric and Diffraction MTF charts for Global Vision Lenses
RONKONKOMA, N.Y., — February 3, 2014 – Sigma Corporation of America, a leading researcher, developer, manufacturer and service provider of some of the world’s most impressive lines of lenses, cameras and flashes, today announced that the company will now release a Geometrical MTF (Modulation Transfer Function) chart in addition to a Diffraction MTF chart when measuring the performance of all new Global Vision lenses.
MTF charts are important because they help photographers better understand the optical quality of lenses. Sigma has traditionally released Diffraction MTF data because it takes the diffraction quality of light into consideration, which can dramatically affect the data outcome. Diffracted light exists at every aperture, giving photographers a more accurate measurement of how the lens will perform in real life. Although Geometric MTF data is easier to measure and calculate since it does not consider the diffraction quality of light, it tends to show higher values in the graph and less defined results.
“As a family-owned organization, we hold ourselves and the products we design to a very high standard,” said Mark Amir-Hamzeh, president of Sigma Corporation of America. “Our customer’s expect high quality products and by sharing both MTF charts for all our new lenses, we are able to help guide them in making the most informed purchase decisions based on how our lenses will perform in actual photography situations.”
As a leader in technology and innovation, Sigma Corporation is committed to showing the true value and quality standards of all Sigma Global Vision lenses. Every lens is tested with Sigma’s proprietary modulation transfer function (MTF) “A1” measuring system before being shipped from the factory in Japan. By making both MTF charts available, Sigma is providing its customers with accurate measurements of its lenses and giving photographers a chance to see the full potential of Sigma’s lenses.
B&H photo has the well regarded Sigma 105mm f/2.8 EX DG OS macro lens for sale for $669 after a $300 rebate (compare at $969.00)
Sigma 105mm f/2.8 EX DG OS macro lens
B&H Photo has informed us that the Sigma lens rebates will end tomorrow.
You can save up to $200 on Sigma lenses and still get free overnight shipping if you order today.
Sigma Deals at B&H Photo
More Sigma Primes
We’re told that Sigma is working on a 135 f/2 DG OS Art series prime lens for release some time in 2014. Possibly around Photokina in September.
The source goes on to say that Sigma is going to be very aggressive next year and announce a lot of high performance glass.
The same source also says that Sigma may have a surprise camera announcement. There are a few details to be worked out, but there’s a possibility of a big DSLR announcement.
New 300 f/2.8 OS & 400 f/2.8 OS lenses coming?
We’ve been told again that Sigma will likely announce new “sport lenses” some time in 2014. The first two to come will be the 300mm f/2.8 OS and 400mm f/2.8 OS. One of these lenses may be in testing for the Sochi Olympics this winter. A new 500mm and 800mm zoom lens could also be on the horizon, but less is known about them at this time.
A recent patent for a 300 f/2.8 from Sigma does make a good case for the updates.
Is Sigma getting serious?
Below is a list compiled by [PR] about possible lens announcements by Sigma before the Photokina show in September 2014. Most of these lenses we’ve already posted about, but once you put them in a list, it appears Sigma has their work cut out for them.
Announcements don’t necessarily mean availability before next year, especially with the big super telephoto lenses.
- Sigma 24-105mm f/4 OS
- Sigma 24-70mm f/2 OS HSM (Could be 2.8)
- Sigma 300mm f/2.8 OS
- Sigma 400mm f/2.8 OS
- Sigma 500mm f/4 OS
- Sigma 600mm f/4 OS
- Sigma 135mm f/1.8 DG OS
- Sigma 24mm f/1.4 DG ART
- Sigma 50mm f/1.4 ART
More from Sigma?
We’ve been told to expect an announcement some time in 2013 for a 24-105mm f/4 OS lens from Sigma.
Such a lens could be a big winner if it performs better than the Canon EF 24-70 f/4L IS and the EF 24-105 f/4L IS.
Super Telephoto ART Calibre Lenses
We’re told Sigma is working on new 300 & 400 f/2.8 OS lenses as well as new 500 & 600 f/4 OS lenses. The lenses would incorporate Sigma’s new philosophy on quality, but at a much lesser price than the Canon or Nikon counterpart.
We could see an announcement on multiple large lenses sometime in 2014.
RONKONKOMA, N.Y., – Aug. 1, 2013 - Sigma Corporation of America, a leading researcher, developer, manufacturer and service provider of some of the world’s most impressive lines of lenses, cameras and flashes, today announced a revolutionary new, fee-based service that will enable the company’s Global Vision lens owners to change their lens mounts for use on different camera systems.
Starting Sept. 2, Global Vision lens owners can request the Mount Conversion Service to convert their current Sport, Contemporary or Art DSLR lenses to their choice of a Sigma, Sony, Pentax, Nikon or Canon mount. Global Vision category lenses for mirrorless interchangeable lens cameras (MILCs) can be updated to either a micro four thirds (MFT) or Sony E- mount.
In addition to the announcement of the industry’s first Mount Conversion Service, Sigma is also extending the warranty on all of its products – including cameras, lenses and flashes purchased on or after July 1, 2013 – to four years. Previously, warranties varied by product. This enhanced product protection provides Sigma’s customers with more consistency and improved service.
“Professionals and amateurs alike are taking advantage of the many affordable camera options in today’s market; they’re updating their camera bags and exploring new systems and brands,” said Mark Amir-Hamzeh, president of Sigma Corporation of America. “When photographers purchase a lens, it’s often a significant, financial and artistic commitment – and we believe that investment should last a lifetime. Our new Mount Conversion Service and extended warranty are intended to help Sigma users get more enjoyment from our products, regardless of how their approach to photography changes overtime.”
The Mount Conversion Service is limited to all of Sigma’s Global Vision lenses. Current, applicable full-frame lenses include the 120-300mm F2.8 DG OS Sport and 35mm F1.4 DG Art; APS-C crop sensor lenses include the 30mm F1.4 DC HSM Art, 17-70mm F2.8-4 DC OS Macro Contemporary and 18-35mm F1.8 DC Art; and MILC lenses include the 19mm F2.8 DN Art, 30mm F2.8 DN Art and 60mm F2.8 DN Art. Lenses can be converted to any mount of a photographer’s choosing, as long as Sigma has released that product in the requested mount.
Cost of the conversion will range between $80 to $250, plus shipping costs, depending on the focal length of the lens. All lenses will be shipped to Sigma’s US subsidiary in New York, and updated, calibrated and optimized for the new camera system at Sigma’s factory in Aizu, Japan. All lenses that undergo the Mount Conversion Service will be covered under warranty for six months following the update. Teleconverters, USB Docks and other accessories are not eligible for the service.
To request the Mount Conversion Service, please visit your local Sigma subsidiary. Customers in the United States should visit www.sigmaphoto.com.
Sigma has started a new instant rebate program in the United States. Save up to $200 on select lenses until September 25, 2013.
Sigma lens rebates at B&H Photo
Tamron is running instant rebates until September 30, 2013. Included in their program is the highly regarded 24-70 f/2.8 VC
Tamron lens rebates at B&H Photo
Canon’s lens and Speedlite rebates are set to expire on July 6, 2013. B&H Photo is telling us that the rebate program is not being extended. There’s a chance a new program will launch shortly after this one, but there’s no guarantees of that for the moment.
Canon lens & Speedlite rebates at B&H Photo