Contact
One address, read by one person. That person is me, Ulisses Balbino, and I built every calculator on this site.
Write to that address directly if you prefer. The form below is a shortcut, not a gate.
What that button actually does
It is worth being plain about this, because a lot of contact forms on the internet are decorative and quietly throw your message away.
This site has no server. It is a folder of static files, which is why it loads instantly and why nothing you type into a calculator ever leaves your machine. A form with no server behind it cannot send anything on its own, so this one does not pretend to. It takes what you wrote, assembles a subject line and a message body, and hands the whole thing to your own email program with the address already filled in. You read it, you press send, and it arrives from your address so I can reply to you.
Nothing is uploaded, stored, logged or passed to a third party at any point, because there is nowhere here for any of that to happen.
If the button does nothing, it means your device has no email program connected to the browser, which is common on a desktop that uses webmail only. In that case copy the address, ulisses@openyourais.com, into whatever you normally write email in. Same inbox, same person reading it.
What is worth writing about
A number that looks wrong
This is the most valuable message I can get, and it goes to the front of the queue. Send the page, the figure, and the source that disagrees with it. Manufacturer and platform publications win every argument here, including against me. I will correct the page and say what changed.
A published table I have not found
The hardest part of building this site was finding data rates that manufacturers actually publish rather than figures that circulate on forums until they feel official. If you know of a published table from a camera maker or a platform that belongs here, that link is genuinely useful, and it will show up on the sources page with the credit for finding it.
A calculator that should exist
If you keep doing the same piece of arithmetic by hand on jobs, tell me what it is. Every tool on this site started as something I was tired of working out on the back of a call sheet, so that is a proven way to get my attention.
Reuse and licensing
Quoting a figure with a link back is welcome and needs no permission. Anything larger, such as embedding a calculator or republishing a table, is a conversation. The terms page covers where the line sits.
What I cannot help with
I cannot tell you which card to buy, diagnose a camera that is dropping frames, or work out what happened to footage that has already gone missing. I am a film director who builds calculators, not a support desk, and pretending otherwise would waste your time at a moment when you probably do not have any.
For anything about how this site handles data, the privacy page is more complete than an email answer would be.
Reply times
I read everything that arrives. Corrections get answered quickly, because a wrong number on a public calculator is a small emergency. Everything else gets answered when a shoot is not eating the week. That is an honest description rather than a service promise, and I would rather give you the honest one.