Jump to content

Search the Community

Showing results for tags 'aperture'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Cinematography Forums
    • General Discussion
    • News & Press Releases
    • Lighting
    • Camera Operating
    • AC's & DIT's
    • Grip & Rigging
    • Visual Effects Cinematography
    • Grading, DI and Telecine
    • Students and New Filmmakers
    • Cameras Systems and Formats
    • Lenses & Lens Accessories
    • Camera Accessories & Tools
    • Film Stocks & Processing
    • Books for the Cinematographer
    • Cinematographers
    • In Production / Behind the Scenes
    • On Screen / Reviews & Observations
    • Cine Marketplace
    • Business Practices
    • Jobs, Resumes, and Reels
    • Please Critique My Work
    • Regional Cinematography Groups
  • Not Cinematography
    • Producing
    • Directing
    • Sound
    • Editing
    • Off-Topic
    • Forum Support

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


Website URL


Skype


Location


My Gear


Specialties

Found 7 results

  1. Hi, We are two technicians working in the film industry in France (a grip guy and a gaffer) and we just discovered this very interesting forum. We particularly noticed that gaffers and cinematographers were asking questions about light output and what aperture is obtained at a certain distance. It happens that with the help of two IT engineers we developed an iOS app responding to this question about 2 years ago. First and for all, we’re not going to post messages everywhere on this forum to sell our app nor are we going to pollute your threads to gain in visibility. We just think s
  2. Hey everyone, I'm getting ready for a film challenge where our entire short will be made on a single 100 ft reel of Kodak 7219 and shot on a Krasnogorsk-3. In preparation for the shoot I decided to do a lens test with the stock Meteor 5-1 lens on my original Blackmagic Pocket Camera. Surprisingly though, my footage all seemed to be about a stop under exposed. I know that the aperture of a lens doesn't always let in as much light as it should and that T-stops are supposed to correct for this, right? So is this the case here? Have those of you that use the Krasnogorsk-3 encountere
  3. Hi group, Well I was always wondering: Why don't lenses provide the F stop which exactly corresponds to the light actually hitting the film emulsion or sensor (not accounting for lens flare and other random factors, just the glass inside the lens)? So in reality: if I get an F stop value from, say, a light meter, I most likely will get it in T stop. Otherwise the "exposure triangle" would make no sense (to me that is). Looks like some lenses are reducing as much as one stop while others perhaps a third of a stop. There is some information for some lenses regarding the actual T-stop, but ma
  4. Hi, I'm Ben, a learning camera assistant who chose not to study film and is now catching up on production etiquette and techniques! I recently pulled focus on a short film for a great DoP (Tansy Simpson) here in London and at one point she asked me to push the iris to a 'two plus' Now i assumed this meant something like a t2.1, or did it mean 2.5? I'd love to get clarification on this as I was too worried she might think I was an amateur if i asked! Thanks in advance for any help offered, Benjamin
  5. Hi all :) When using a metabones speedboster, how do you really gauge the true aperture the lens is giving you? I mean from a practical point of view, you keep it mind that you get +1 stop of light hitting the sensor. But from a tech point of view, if your lens is set at let’s say 2.8 (and it’s the fastest the lens can get to), does the camera shows you the added stop? Or is it a passive speedboaster that doesn’t trasmit aperture values? In case it doesn’t trasmit that, you just keep in mind that if the lens is set at 11, you could set f/8 on your light meter? So in practice c
  6. Hi everybody, I was wondering how people control the aperture and pull focus during a steadycam shot for example. Is it possible through only one remote? Or I'd be necessary to do so with 2 different motors and and remotes? Thank you in advance for the help, Davide
  7. The fact that I'm creating a topic of this nature may come to a surprise to many of you, but I feel it's necessary because I'm getting at least three different answers based on my own research. 1) Wikipedia: http://en.wikipedia.org/wiki/16_mm_film#Super_16_mm WP states the camera aperture is 12.52 by 7.41 mm (0.493 by 0.292 in). This gives us an aspect ratio of 1.6884:1 (1.69:1). Unfortunately, nothing is cited clearly in that article (shocker!). For an interesting twist, the entry also lists regular 16 mm as having a height of 7.49 mm (0.295 in). I thought Super 16 just extended t
×
×
  • Create New...