Alan Gordon Enterprises Mark Vb Director's Viewfinder

According to Alan Gordon, The Mark Vb has all the features of the Mark V plus new markings on the Aspect Ratio ring, making it easier to read for both film and video use. We also eliminated the 1/2 video window and replaced it with the current video chip standard of 2/3 . Film sizes and video formats are color-coded for quick reading.

I have never used it for that purpose, but I am very positive that you can set it up very precisely yourself in a few min.

Yes, the Alan Gordon Enterprises Mark Vb Director's Viewfinder has an option to cover 35mm (18-200mm).

The Alan Gordon Enterprises Mark Vb Director's Viewfinder (B&H# ALDVFM5B) does not fit onto a camera but rather is used as a standalone viewfinder. As such, it may be used while filming with any camera including the Sony PMW-F5 CineAlta Digital Cinema Camera (B&H# SOPMWF5) or Canon EOS C300 Mark III Digital Cinema Camera Body (EF Lens Mount) (B&H #CAC3003EF) in order to get an idea of the framing of the image in 16mm, 35mm, and other sizes of film or sensor formats.

this has all standard film formats including standard S35 sensor size

Yes, the metal ring between the rubber eyecup and the body of the viewfinder is a so called "focusing ring". Once you set it up to your desired diopter (there are no markings, you do it by the eye), I suggest that you gaffer tape it together with rubber eyecup because it has a tendency to fall off and it is a very important part of the device. I always keep a spare in my bag!

Formats16mm film: 8.5-100mmS16mm: 10.5-125mm35mm: 18-200mm35mm Anamorphic: 35-420mm1/2 Video: 6.5-80mm2/3 Video: 8.5-75mm1 Video: 10.5-125mm

Mark Vb has a dial for Super16mm format lenses from 10.5mm-125mm. I haven’t tested it and compared with my BMPCC4K. I’m using the viewfinder on my Alexa shoot for location scouting and camera setups