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Discussion in 'Pinhole Photography' started by M.A.Longmore, Sep 30, 2011.
Pinhole Assist, can be found in the iTunes App Store !
Looks OK, pity you cannot store different reciprocity curves, not lots just a few films. It says you can adjust set curve but couldn't fond out how.
(I am the developer of the app) I just wrote the web page about custom curves yesterday. You will find there explanations: leborddelapiscine.blogspot.com
Alternatively, If you have trouble, send me your data, I will write the file for you.
Regarding your request for differents curves,: Yes it is planned. In fact, there are 4 curves already integrated in the app, but there are hidden (lack of time for building the interface). Next major release will include these predefined curves and user curves.
Thanks for that I'll give it a go, but the question is were do you fing that file in iTunes? . It looks like there is just a look up table to set the values in, is that a correct understanding? I like the ability to off set the lightmeter reading so to calibrate it.
THat's two questions :
Answer 1 : to calibrate the cell, open the "settings" app (first screen of the springboard) you will find one entry labeled "pinhole assit". You can adjust the cell there.
Answer 2 : For changing the table values, open itunes; select your iphone/ipod. On the "Apps" settings, below the part where you can check/uncheck your azpp on the iphone, there is a list with app. Look for pinhole assist there. Clic on it. The file is displayed on the left. (see there http://leborddelapiscine.blogspot.com/2011/10/howto-make-custom-reciprocity-chart-for.html )
My iTunes looks like that ( in french : replace "Assistant Sténopé with "Pinhole Assist") :
All this is detailled (with screenshots) in the "help" of the app ( circled (i) on bottom right on the main screen (I can't post the bitmap, it is too large).
I tried the app but measurement with the camera always results in 0 ev.
Definitly, there is a problem. The strange point is that the video is ok, but the program seems to fails to read the exif data.
Thank you for reporting the problem. I need some more information:
- What is your iPhone/iPod model ?
- What iOS version do you have ?
--> maybe we can continue on private mail.
An update to Pinhole asist is available. It should cure the problem you have, limnidytis.
In addition (the following text is an excerpt of the update information) :
* BETTER CELL ACCURACY,
* BETTER INDICATION OF LONG EXPOSURES,
* SUPPORT FOR HARMAN TiTAN CAMERA (f:206, 250 and 288),
* ADDED DIAPHGRAM VALUES OF 2,4,8,16 for calibrating purpose (use these value to compare measure with your "classical" camera".
* ADDED RATINGS SUPPORT
With Pinhole Assist 1.5 now supporting multiple reciprocity charts, new charts were expected. Here they are.
A chart adapted from Jim Shull's The Hole Thing (the one I currently used for films)
Several charts derived from formulas by Gadget Gainer on APUG forums :
Several chart derived from formulas originating from Without Lenses website
T max 400
T max 100
TRiX & Plus 125
A chart for Ilford films
free download here : http://leborddelapiscine.blogspot.com/2011/12/new-reciprocity-file-charts-for-pinhole.html