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GLM / A field guide to cinema glass36 lens families

The image starts here.

Lens
Explorer

Find a lens by its character, its format, or the way you shoot.

Original illustrative lens50 mm / T1.5 study

The assembled lens

A machine for seeing.

Precision rings outside. Carefully arranged glass inside. Turn the lens, then pull the assembly apart.

Scroll to take it apart
0°

Conceptual anatomy. No manufacturer design or optical performance is being simulated.

A FEW MINUTES AT THE OPTICAL BENCH

PLAY WITH LIGHT.

Turn a control. Watch the image change.
Three small experiments in seeing.

f/2.8HIGHLIGHTIRIS / GEOMETRIC STUDY

Illustrative optics. These are diagrams, not sample footage from a named lens.

EXPERIMENT 01

OPEN IT UP.

A small opening. A big difference. Move the iris and see how aperture changes the light passing through a lens.

f/2 · wide openf/16 · stopped down
Iris blades
51%

Geometric light relative to f/2.
Exposure settings held constant.

A wider aperture usually gives shallower depth of field. Distance and format matter too. T-stops account for transmission loss; this f-stop sketch does not.

Read more from Nikon

THE GLASS MAKES A DIFFERENCE

FIND YOUR
KIND OF GLASS.

From precise modern primes to gloriously imperfect classics. Explore 36 lens families by what makes them different.

36 families in the collection

ORIGINAL OPTICAL STUDIES

12 of 36 on the bench

Lens drawings illustrate optical types, not exact manufacturer designs. Rendering notes are qualitative. Coverage and mechanics can vary by focal length, generation and rehousing.

THE SHORTLIST2 / 2
Cooke SP3
Cooke Speed Panchro
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