iphone lightmeter for pinhole

[medium120]

hi all

i entered this analog photography world from LOMO toy cams

now i am doing some more experimental things and considering to get a light meter to go with my DIY pinhole...
saw on the internet that there's lot of iphone light meters

this one looks good http://www.kitdastudio.com/?p=183
and it said it got a timer for the pinhole photogtraphers... sounds "designed"...

but... anyone knows how these things work like? accurate like the analog ones ?

I got a few free ones http://itunes.apple.com/us/app/light-meter-free/id410228606?mt=8
they works pretty well when compared with reading from digital cam pictures...

any suggestions would be appreciated :munch:

best
medium120

 

[postalman]

I find my android one is a good match for my digital camera. Unfortunately it only does ev2-ev12 (meaning can only be trusted for ev3-ev11) due to hardware limitations, which sucks when dealing with ev11-16. Not sure what the range on the iPhone light sensor is though.

I'm personally looking around or a small analogue meter to replace it with.

 

[Mike Wilde]

It is common to use a small dial calculator to translate the smallest commercial light meter reading (typically f/32 to f/90, depending on the hardware) into the f/256 to f/512 range common with pinhole. The trickly part is to also incorporate the effect of reciprocity failure into the exposure. I have seen home mnade dial calculators that have two sides; one for the smaller aperture translation, and the second to do reciprocity work arounds.

 

[SMBooth]

Not enough ranges in the aperture. Pocket Lightmeter app is proberly better option for "app" meters. EV calculator is worth having a play with too. Not a lightmeter as such more a EV dial with good aperture selection

 

[Rich Ullsmith]

I have found metering to be counterproductive with pinhole. Perhaps if the exposures are going to be in the range of seconds instead of minutes, it might be helpful. I think learning the characteristics of a particular film and developer is more useful in pinhole.