There Is An App For That ?

[M.A.Longmore]

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Pinhole Assist, can be found in the iTunes App Store !

Ron
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[SMBooth]

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.

 

[pinholic]

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.

 

[SMBooth]

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.

 

[pinholic]

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).

 

[limnidytis]

I tried the app but measurement with the camera always results in 0 ev.

 

[pinholic]

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.

 

[Romary]

Android?

 

[pinholic]

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

 

[pinholic]

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 :
400TX
TMX
TMY
HP5+
100 Delta
Several chart derived from formulas originating from Without Lenses website
T max 400
T max 100
TRiX & Plus 125
Ilford films
A chart for Ilford films

free download here : http://leborddelapiscine.blogspot.com/2011/12/new-reciprocity-file-charts-for-pinhole.html