In the video below we show you the ARRI sensor/format coverage of each lens in our TLS Cooke Speed Panchro lens set, up to LF open gate.
You'll notice that only the longer lenses completely cover the LF open gate format, which is to be expected from a set of vintage lenses designed in the 1940s and 1950s.
An interesting detail is that sensor coverage changes as focus is racked, which is why a video works well as we can show you how coverage changes as focus is racked from minimum object distance to infinity. This is primarily visible in the wider focal lengths lenses.
The table below summarises coverage of the lenses in our set.
TLS Cooke Speed Panchro Image Circles & Format Coverage
Focal LengthImage CircleLF Open GateS35 Open GateS35 3.2K
18mm
≅31mmNo
No
Yes
25mm
≅34mmNo
Yes
Yes
32mm
≅32mmNo
Mostly - strong vignette
Yes
40mm
≅38mmNo
Yes
Yes
50mm
≅44mmYes - some vignetting
Yes
Yes
75mm
≅45mmYes
Yes
Yes