Quick question regarding f-stop/t-stop

[James Lyndon]

Hi

 

I just downloaded Drylab's Set Report app for iPhone. I'm going throught the features and under each take you have the ability to assign the T-Stop. Coming from a photography backround the options are a little different to what I'm used to (f-stops).

 

The options are, for example:

 

1.4

1.4+

1.4/2

2/1.4

2-

2

2+

2/2.8

2.8/2

...etc

 

If iI'm shooting at 1.4 that's fine but what if I'm shooting at 1.8 or 2.5?

 

do these values represent 1/3rd and 1/2 stops or something? If so which is which?

 

Hopefully someone can shed some light on these meanings.

 

Thanks in advance.

 

- James Lyndon

[Max Field]

Are you just asking the difference between t-stop and f-stop? The wording confuses me slightly.

[James Lyndon]

No, I'm asking what the terminology of

 

1.4+

1.4-

1.4/2

2/1.4

...etc

 

I;ve attached an image of the app options wheel:

 

[Adrian Sierkowski]

looks to me like the app designer is just crap. 2/2.8 coudl be a 2 and 1/3rd and maybe 2.8/2 is more like a 2 and 1/2 and 2.8- is more like a 2 2/3rds

 

In cinema we generally don't work in the, as i call them, strange stops, e.g. 1.8 ( we'd call that 2 and 2/3rds-- or sometimes a bump under 2.8).