Zeiss ZK-Series Bedienungsanleitung PDF herunterladen (Seite 8)

Types of 35mm Lenses

DSLR Lenses – Canon vs. Nikon Mount

There are a huge range of DSLR lenses which offer

excellent optics and variations on primes, zooms, mounts

etc that the choice can be bewildering. However, some

useful points about using DSLR lenses for cinematic

productions:

Firstly, modern digital SLR cameras tend to be fully

automatic and all of the lens controls are operable from

the camera. Consequently, over time, the manual

functions began to disappear from stills lenses, so that

today many lenses available to buy do not have a manual

iris ring, which makes them useless for the lens adapters

above. Canon followed this lead and even their most

expensive lenses don’t have a manual iris ring, so the

camera body always controls the iris adjustment.

This is counter to how cinematographers like to work, so VMI prefer to offer fully-manual

Nikon-mounted Zeiss ZF Distagon and ZF planer lenses with high quality Nikon-Canon

adapter rings. This means that you have the benefit of using a fully manual lens on a DSLR

adapter.

Problems with using stills lenses for video applications

1. Stills lenses aren't built to withstand the rigours of motion picture film

production, which means that they are built in much more lightweight lens housings.

As a result of this, the screws holding a lens together are not designed to withstand

the forces applied when using follow focus units etc. If you use a lens control system

to control the focus, then the power of the servo units is sufficient to rip the screws of

a stills lens apart!

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Zeiss ZK-Series Bedienungsanleitung Seite 8