Free FomaPan Reciprocity IOS APP

[ian barber]

For many years, I have found myself returning to Fomapan black and white films, so I decided to create a simple iOS app specifically for Fomapan users.
There are no unnecessary features or complicated settings. It is simply designed to get the job done.

The app calculates reciprocity corrected exposure times for Fomapan 100, 200 and 400, making long exposure photography much easier without needing to consult charts or work through the calculations manually.

Just choose your film, enter the metered exposure time, and the app gives you the corrected exposure.

It is now available on the Apple App Store.
https://apple.co/4gQtUF9

 

[ian barber]

It looks like you used the Te=Tm[1.5(logTm)^2+4.5(logTm)+3] formula

The above formula is different to the one I used in the App.

past 1 sec you could add at least thirds of a stop?

I can see the benefit for this so I will add it in the next release

Ian

 

[ian barber]

I have submitted Version 1.1 to Apple to review.
Version 1.0 took 9 days to get approved so will just have to wait and see if they approve 1.1

What's New

• Added selectable full, half and third-stop exposure intervals
• Added filter compensation for ND and coloured filters
• Added a built-in exposure countdown timer
• Added warnings when calculations exceed published data
• Added an About section and privacy-policy link
• Refined the interface and improved usability

 

[Flack]

I shoot a lot of Formapan when I can get out with my camera, so this should be handy, thanks Ian.

 

[Vieri]

Version 1.1 is now live

I checked it out, adding the timer is a great idea!

Nice to have the filters as well, although not as fundamental as the timer in my opinion (people using film are normally used to calculate filter adjustments), but still a cool extra. I think that having thirds of a stop in the Exposure adjustment for ND filter to be overkill, since all ND filters are rated in single stops and it makes it more cumbersome to move between different filters. Also for colour filters, the most you need is 1/2 stop precision, 1/3 is overkill.

Also, but this is just cosmetics, I don't know if the numbers in the "metered exposure" selectors are calculated by the app or if you have any control over them, but you might want to revise them, e.g. in the 1/3 stop selector after 2 you got 2.5 sec (should be 2.6).

Hope this helps, best

Vieri