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Blog Articles Medium Format Mirrorless L-Mount DSLR Zeiss Leica Making Sharp Images BW+IR

spherical aberration

optical behavior in which rays from different areas of the lens focus at slightly different distances resulting in a smearing of focus

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2016-05-05 Shipping: Sony FE 50mm f/1.8

2016-03-31 Sony FE 50mm f/1.8

2012-03-08 Thoughts on Canon EOS 5D Mark III, 22.3 Megapixels

2011-03-13 Zeiss 35mm f/1.4 Distagon Spherical Aberration Study

2010-08-13 Spherical aberration — aspherical vs spherical lens elements

2010-08-09 Spherical aberration + Nikon 50mm f/1.2 AIS

Sharpness and Blur by Optics

Blur from optical behavior or subject-related issue..

1. Blur and Haze from Spherical Aberration

How To Get Peak Sharpness With Perfect Focus

Focusing is more complicated than it first appears..

1. Focus Fast Lenses Stopped Down
2. Use Focus Assist (Electronic Rangefinder)

Focus Shift and Spherical Aberration

Elusive sharpness, depending on aperture.

1. Your Lens Might Be Sharper Than It Seems! 📹

Spherical Aberration

Diffuse haze at wide apertures..

1. Spherical Aberration
2. Examples of Spherical Aberration
3. Case Study: Spherical Aberration with Nikon 50mm f/1.2 AIS

Longitudinal Chromatic Aberration

Understanding Longitudinal (Axial) chromatic aberration (LOCA)..

1. Longitudinal Chromatic Aberration (LOCA / Violet Fringing)
2. Spherochromaticism (Spherical Aberration by Color)

How to Test A Lens

How to verify a good sample and assess all aspects of lens performance..

1. Focusing Accuracy When Testing

Landscape Photography at Wide Apertures

Escape the banale postcard look by shooting landscapes at f/1.4 or f/0.95..

1. Challenges

Pentax 31mm f/1.8

Full frame moderate wide angle..

1. Overview of PENTAX smc FA 31mm f/1.8 Limited

Focus Shift In-Depth

Focus shift assesments of a wide variety of lenses of various brands. Shows a range of apertures for each lens and the mount of focus shift, discusses how to compensate for it..

1. Focus Shift and Spherical Aberration
2. ~100mm Lenses: Canon, Nikon, Zeiss

Schneider Kreuznach LS 35mm f/3.5

Wide angle 24mm equivalent for Phase One XF system.

1. Aperture Series: Mosaic (IQ4 150)

Schneider Kreuznach LS 80mm f/2.8

Compact normal 54mm equivalent for Phase One XF system.

1. Aperture Series: Mosaic (IQ4 150)

Optical Performance

Sharpness and rendering..

1. Resolution Charts Overview

35mm f/1.4 Distagon

Strokes of a master..

1. MTF For 35/1.4 Distagon
2. Examples Near Alpine Creek
3. Sharpening for f/1.4 and f/2
4. 35/1.4 Distagon Spherical Aberration Assessment
5. Comparison — Zeiss ZE 35 f/2 (Mosaic)

50mm f/1.4 Planar

Brilliant imaging in a compact package..

1. 50/1.4 Planar Main Page

85mm f/1.4 Planar

True-to-life imagery..

1. Focus Shift

Zeiss LensSpire Articles

Articles written for Lenspire.ZEISS.com..

1. Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges 📹

Focus

Focus accuracy and focus shift..

1. Focus Shift and Spherical Aberration

Sony FE 50mm f/1.2 GM

High performance, high speed..

1. Design Challenges for Sony FE 50mm f/1.2 GM

Sigma FE 35mm f/1.2 DG DN Art

Ultra high speed native-mount moderate wide angle..

1. MTF for Sigma 35mm f/1.2 DG DN Art, Fantasy vs Reality

Leica M 50mm Lenses

Six models to choose from..

1. Noctilux vs Summilux vs Nikon 50/1.2 (M240, DeChambeau Barn)

Leica 90mm f/2.2 Thambar-M

Leica’s retro telephoto..

1. Leica 90mm f/2.2 Thambar-M, Introduction

Blog posts, reverse chronological

2016

2016-05-05 Shipping: Sony FE 50mm f/1.8

2016-03-31 Sony FE 50mm f/1.8

2012

2012-03-08 Thoughts on Canon EOS 5D Mark III, 22.3 Megapixels

2011

2011-03-13 Zeiss 35mm f/1.4 Distagon Spherical Aberration Study

2010

2010-08-13 Spherical aberration — aspherical vs spherical lens elements

2010-08-09 Spherical aberration + Nikon 50mm f/1.2 AIS