High capacity, high-performance fault-tolerant storage for photography and video.
Non-RAID or RAID-0/1/4/5/10.
Capacities up to 84 Terabytes!
Zeiss 15/2.8 Distagon Q&A — Distortion
Related: distortion, optics, wide angle, Zeiss, Zeiss 15mm f/2.8 Distagon, Zeiss Distagon, Zeiss DSLR Lenses
This is one of several pages resulting from the March 13, 2012 discussion with Staff Scientist Dr. Hubert Nasse. See the original list of questions.
These pages are a summary of the discussion based on notes taken, and as reviewed by Dr. Nasse. Bracketed comments [ ] are editorial in nature.
Low distortion was a design goal for the 15/2.8 Distagon. In particular, a distortion goal of 2% was desirable, and also to avoid a wave-type distortion as found with the 21/2.8 Distagon (one of its few faults).
The 15/2.8 Distagon succeeds with only 2% barrel distortion, which is usually undetectable by the eye. For critical uses, barrel distortion is straightforward to correct in post processing.
For very close work near to 1:9, the distortion rises, but with such close focusing, the perspective is often the dominating factor. Note that a 1:9 reproduction ratio involves a sensor to subject distance of only 25cm (10 inches), and that affords only 9cm / 3.54" of clearance to the front lens element! Users working at such close range might consider using a filter to protect the front lens element from mishaps.
Up to 128GB for 2019 iMac 5K!
Up to 64GB for 2015/2017 iMac 5K
Save nearly 50% over Apple pricing
20% off every day with coupon code diglloyd20 at NuLeafNaturals.com
100% organic non-GMO, no additives or preservatives, lab tested for purity and quality.
$699 SAVE $450 = 39.0% Apple 12.9" iPad Pro (Mid 2017, 512GB, Wi-Fi Only, Gold) in Electronics: iPads and Tablets
$5499 SAVE $800 = 12.0% Apple 15.4" MacBook Pro with Touch Bar (Mid 2018, Space Gray) in Computers: Apple Macs
$2549 SAVE $300 = 10.0% Apple 15.4" MacBook Pro with Touch Bar (Mid 2018, Space Gray) in Computers: Apple Macs
$7995 SAVE $3720 = 31.0% Leica Leica SL (Typ 601) Mirrorless with 50mm Lens Bundle in Cameras: Mirrorless
$1000 SAVE $500 = 33.0% Westone W80 Eight-Driver True-Fit Earphones with ALO Audio and M… in Electronics: Audio