Just MTF Charts

Just the Cinema MTF Charts: Tokina and Veydra Primes

The Zeiss post was really long, this one is pretty short. I will mention again, these are less than 10 copy averages; we don’t carry a lot of these lenses. But there’s no MTF data elsewhere for them, so I will put out what we have.

A Quick How to on Reading MTF Charts

If you’re new here, you’ll see we have a scientific methodology to our approach, and use MTF charts to measure lens resolution and sharpness. All of our MTF charts test ten of the same lenses, and then we average out the results. MTF (or (or Modulation Transfer Function) Charts measure the optical potential of a lens by plotting the contrast and resolution of the lens from the center to the outer corners of the frame. An MTF chart has two axis, the y-axis (vertical) and the x-axis (horizontal).

The y-axis (vertical) measures how accurately the lens reproduces the object (sharpness), where 1.0 would be the theoretical “perfect lens”. The x-axis (horizontal) measures the distance from the center of a lens to the edges (measured in millimeters where 0mm represents the center, and 20mm represents the corner point). Generally, a lens has the greatest theoretical sharpness in the center, with the sharpness being reduced in the corners.

Tangential & Sagittal Lines

The graph then plots two sets of five different ranges. These sets are broken down into Tangential lines (solid lines on our graphs) and Sagittal (dotted lines on our graphs). Sagittal lines are a pattern where the lines are oriented parallel to a line through the center of the image. Tangential (or Meridonial)  lines are tested where the lines are aligned perpendicular to a line through the center of the image.

From there, the Sagittal and Tangential tests are done in 5 sets, started at 10 lines per millimeter (lp/mm), all the way up to 50 lines per millimeter (lp/mm). To put this in layman’s terms, the higher lp/mm measure how well the lens resolves fine detail. So, higher MTF is better than lower, and less separation of the sagittal and tangential lines are better than a lot of separation. Please keep in mind this is a simple introduction to MTF charts, for a more scientific explanation, feel free to read this article.

 

Tokina Vista Cine Lenses

Vista 18mm T1.5

Lensrentals.com, 2019

Vista 25mm T1.5

Lensrentals.com, 2019

Vista 35mm T1.5

Lensrentals.com, 2019

Vista 50mm T1.5

Lensrentals.com, 2019

Vista 85mm T1.5

Lensrentals.com, 2019

Vista 105mm T1.5

Lensrentals.com, 2019

 

Veydra Mini-Primes

The Veyrdras don’t cover a FF sensor, most technically cover an S35 size sensor, but they are at their best on a m4/3 sensor (10mm from center).

12mm T2.2 Mini Prime

Lensrentals.com, 2019

16mm T2.2 Mini Prime

Lensrentals.com, 2019

25mm T2.2 Mini Prime

Lensrentals.com, 2019

35mm T2.2 Mini Prime

Lensrentals.com, 2019

50mm T2.2 Mini Prime

Lensrentals.com, 2019

85mm T2.2 Mini Prime

Lensrentals.com, 2019

 

Roger Cicala, Aaron Closz, and Brandon Dube

Lensrentals.com,

June, 2019

Author: Roger Cicala

I’m Roger and I am the founder of Lensrentals.com. Hailed as one of the optic nerds here, I enjoy shooting collimated light through 30X microscope objectives in my spare time. When I do take real pictures I like using something different: a Medium format, or Pentax K1, or a Sony RX1R.

Posted in Just MTF Charts
  • Max

    Thnx for the test! Any plans on charting cine zooms? Sigma, Fujinon, Angineaux EZ especially interesting!

  • boeck hannes

    thank you. your posts make me soooo happy! invaluable!

  • Totally agree. The best lenses no one has heard of. But they are getting hard to find.

  • Max Manzan

    Within the intended 4/3 image circle the performance of the Veydras continue to impress.

Follow on Feedly