erikjorgensen303 PRO 10:54pm, 7 June 2012
Hi everyone,
i did a quick search on this and couldn't find anything. I am getting more technical in my shooting but currently dont own a "real" light meter. i do however have two iPhone app light meters. I was shooting today and checked a single shot with both meters and they both had different readings. Has anyone tested the accuracy of these apps against a real light meter and if so which is most accurate or inaccurate??
Reflectorboy 5 years ago
I've been using "Pocket Light Meter" by Nuwaste studios for almost a year now. As long as I have it set to full stops it matches my Polaris meter almost every time. But I think the true test is how consistent the exposures are on a that situation, it has been accurate every time. Just have to keep in mind that it is a reflective meter and make adjustments like you would with any other reflective meter.
Nate Matos 5 years ago
I have two as well, I don't use them for every shot. I've gone light meter-less enough now that I can do a damn fine job at guessing. Most of the time it's just "I bet this is 5.6 at 1/125" then I'll double check it with my phone. Modern neg film is forgiving enough it's not going to really matter all that much for shooting on the street. If I'm doing portraits or something a little more "serious" I'll use a real meter/built in spot meter.
Tony WAS 5 years ago
I use the iPhone app "Pocket Light Meter" and it does a pretty good job, even with slide film. It has a semi-spot meter by just touching the screen where you want a reading. Like all light meters, you have to exercise a little judgement on where you meter. The only thing I wish I could add is lens info, particularly focal lengths. Zoom would also be handy.

Mount Moran-Oxbow Bend by Tony WAS

pocket light meter app by Tony WAS
Eirik0304 PRO 5 years ago
I too use the same meter after mye Sekonic died on me. At least when not using a the cold shoe mounted VC II meter on my smaller cameras.

I can't fault it at all. It is indeed semi spot. It also adjusts the preview to the settings as they are, so you get an idea as to what the levels are for the whole frame. Since I mostly use normal focal length lenses (which the meter obviously simulates) I get a good preview of what the exposure will look like.
ArthurJS PRO 5 years ago
The darned thing just works. I'd say to those on the fence, download it, and have fun with it. Pocket Light Meter is great.

A. Moore (MooreALX) 5 years ago
I use the same meter app. Absolutely love it. I figure it's saving me a couple hundred that I'd have to dump on a Sekonic, so I kicked up a few bucks to the developer. He deserves it, it's a great product.
ArthurJS PRO 5 years ago
Even happier they went back to the "old" interface/fonts in the app.
absimilard PRO 5 years ago
i used the luxmeter app for measuring fpr my Kiev 60 and Pentax 6x7. I liked the "spot" function and for the fact i photograph mainly perons i measured the light direct in their face.

i often encounter that the negatives are one stop too dark, but i guess i have to lift the exposure to compensate fpr the "light" tones of the face?

nontheless i have shot a Gossen Digipro F lightmeter this week and look forward to it!
erikjorgensen303 PRO 5 years ago
thanks everyone!
danfascia 5 years ago
A little late to the party, but on the back of this thread I started using the Pocket Light Meter app which is super. I previously had Fotometer Pro, which works, but is more about design (faux retro) than accuracy such that it is quite hard to read the exposure. I prefer the utilitarian nature of the Pocket Light Meter app.

@absimilard: Regarding why you need to add a stop to faces, that is exactly correct. Since a meter (any meter) measures for Zone V, 18% grey you will need to increase exposure by one stop for caucasian skin tones if you have metered off the face. The alternative is to meter something mid-grey in the scene if it exists, otherwise adjust accordingly as you have been
robb albrecht 5 years ago
I use the Tiny Light meter app on Android and it seems to work just fine. I use a Sekonic L-508 for most of my metering though. The apps are getting pretty impressive.
chris-hutchison 5 years ago
One more here for the Pocket Light Meter camp. Pretty much every image in my Flickr photostream was metered (or double-checked) with it. In fact, I've never even owned a grown-up light meter!
Jim Austin Jimages PRO 5 years ago
You all got me thinking "outside the frame".

a) What is the range of ISO's, and in what increments, of the app?

b) Where can the Flash metering apps be found, for studio work. ??

Thanks, Jim
Tony WAS 5 years ago
1/3 stop increments:

ISO speed: 0.8-102,400

Aperture range: f/1 - f/512
Covenant OPC PRO 5 years ago
I used it for two rolls of pinhole exposures in a wide variety of lighting. The exposures were from 2 seconds to 3 minutes. All turned out well except for a few I guessed on! I bracketed a few and in each case the iPhone app was correct (when taking reciprocity into account).

Like ArthurJS says, just do it!
flipperkoning 5 years ago
Only downside to the iPhone and light meter apps is that i need to use both hands to operate it, so i prefer a normal light meter i can hold in one hand and the camera in the other!
For real spot metering or flash stuff i use a Kenko 2100 and for casual metering i use the Sekonic L208 Twin Mate, as i often meter with incandescent light!
Tony WAS 5 years ago
Only downside to the iPhone and light meter apps is that i need to use both hands to operate it.

You can operate Pocket Light Meter with one hand quite easily.
chi_cowboy PRO Posted 5 years ago. Edited by chi_cowboy (member) 5 years ago
I also like Pocket Light Meter, but the app does have one huge disadvantage that often prevents me from using it: I need to publicly display my iPhone to operate it.

Here in Chicago, there is a huge problem with roving bands of thugs stealing iPhones. At least one person has been killed in an iPhone theft. In my own downtown workplace, I know of four co-workers whose iPhones have been snatched from their hands while they were walking on the street or taking public transportation.

One friend's iPhone was almost stolen when a nice-looking young lady approached him at a CTA bus stop and asked him when the next bus would be arriving. My friend obligingly pulled out his iPhone and opened the transit app. As he did, a thuglet accomplice waiting nearby reached up to snatch the iPhone.

Unfortunately for the thuglet, my friend the held the iPhone high above his head and the little guy just couldn't jump high enough to grab it. My friend chased the kid for several blocks while calling police on his phone, but to no avail.

Another friend held on to his iPhone while a robber tried grabbing it from his hand, but the sharp edges of the phone's case lacerated his palm in the struggle.

So, yes, I do use Pocket Light Meter and find it quite convenient and accurate. However, do consider the threat of "Apple pickers" before using yours in public.
Vyshemirsky PRO 5 years ago
Hey guys,

I am the developer of Pocket Light Meter app.
It is nice to hear you enjoy it. Let me know if there is anything you think can be done to improve the application.

TheAntiMark 5 years ago
Hi vlad!
I really like your app, I have a few nice to haves...
-An option to include reciprocity (need to select film/paper type)
-Somehow I seem to have problems in very low light with low ISP paper, does this need a special formula?
-An ability to save commonly used camera. Eg I have a pinhole, and I have an slr etc... Says lots of scrolling
Thanks again for the app - its a winner!
Tony WAS 5 years ago
I'd like the following, mostly to later incorporate into EXIF data (using exiftool) and processing B&W film:

1. The ability to manually input lens focal length and aperture used
2. Camera make and model
3. Film name (e.g., Fujichrome Provia 100F)
4. The ability to note B&W developer time changes for the zone system (i.e., n-2, n-1, n, n+1, n+2)

But otherwise, I sure like using the app. Here's a 4x5 I shot and developed this afternoon using my Korona 4x5 with a Fujinon 210mm f/5.6 on Fujichrome Provia 100F. I stopped down one stop for the final exposure (1/15" @ f/8).

Pocket Light Meter metering by Tony WAS

Kids by Tony WAS
Vyshemirsky PRO 5 years ago
@Tony Schountz Brilliant result! I was always worried if the application will be good enough for slide film, but your results are perfect.

I do agree that some extra note taking and EXIF integration would make it an excellent replacement for a notebook. I would probably include some of the suggested features in future updates.

@TheAntiMark Your suggestions are quite difficult. I would need some clarifications with them.

Reciprocity correction - how big of a database should there be? And how would you display a corrected exposure so it is not confusing. None of the professional light meters have that correction feature as far as I know, so displaying the result wouldn't be that intuitive.

When using slow paper you probably hit the reciprocity failure problem, and the only way to find out is to check paper datasheets.

And there is another problem with camera profiles. Imagine that you have a fixed aperture camera, e.g. a pinhole camera. If you use shutter priority mode to measure the exposure for some weird reason, then whatever is the exposure your aperture is the only possible solution for the equation. The same stands for all cameras, as all of them have limited ranges. How would you show that there is an error between the measurement and camera range?
Tony WAS 5 years ago
Oh, and the ability to save the frame number for when I'm using roll film (not sure how I forgot about that one).
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