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Lumu Light Meter for iOS Devices

The Lumu light meter for the iPhone does something your camera can't - 

The Lumu tells you how much light is falling on your subject, not just how much it's reflecting

Digital cameras work out the exposure by measuring the light reflected from your subject towards the camera. This works well enough most of the time, but it falls down when you've got a especially reflective subject, like a white wedding dress, or a non-reflective one like a black cat. That's one reason why all cameras have EV (exposure value) compensation controls, so that you can correct the exposure when it's not quite right.

Original price R 1,199.00 - Original price R 1,199.00
Original price
R 1,199.00
R 1,199.00 - R 1,199.00
Current price R 1,199.00

But old-school photographers and cinematographers know there's another way – you measure the light falling on your subject instead, using a specially-designed translucent dome attachment with a hand-held meter. Taking these 'incident light' readings is more fiddly but measures the thing you really want to know – how much light is falling on your subject, not how much it's bouncing back.

You can now lock in an accurate exposure with the exceptionally portable Lumu Light Meter:  a simple module that connects directly to your iOS device via the 3.5mm headphone jack. This incident meter is compatible with iOS 7.0 and later and utilizes a digital silicone photodiode along with a hemispherical cardioid-type diffuser and black aluminum body to measure ambient light. It offers a wide measuring range of 0.15-250,000 lux, or EV -4 to 20 at ISO 100, and has a rated repeat accuracy of 0.1 EV. Additionally, it does all this with minimal power draw from your device. 

In order to optimize usage for your applications, there are three iOS apps available: Photo, Video, and Pinhole. The Photo app is designed for stills shooters offering a variety of controls, metering options, and settings, including a reflected light mode using the device's camera. Video users will be pleased by their own dedicated app which adds much needed motion parameters such as frame rate to the mix. And, the Pinhole app allows extreme long exposure photographers to work alongside a timer and accurate metering system. 

This meter is very convenient coming in at just 0.94 x 0.78" in size and it has 0.09" of free space between it and the device in order to remain bumper-proof. Also, it comes with a leather neck strap and storage pouch to ensure your investment is either by your side or safely put away.

Lumu Photo App 
Photo Mode: Offers parameters such as time (shutter speed), aperture, ISO, EV, and lux.
Camera Mode: Uses device's camera to create a reflective reading.
Average Mode: Calculate average value or contrast between multiple measurements.
Measure Mode: Show EV and incident light levels in lux or fc (foot candle).
Notes: Store measurements with camera info, location, notes, and a photo.
Settings: EV compensation for using ND filters, EV step in 1 EV or 1/3 EV, custom wallpaper.
Lumu Video App 
Video Mode: Calculate video parameters, including frame rate.
Filter Compensation: EV compensation for using ND filters.
Measure Mode: Show EV and incident light levels in lux or fc.
Lumu Pinhole App 
Photo Mode: Calculate correct time and start a timer.
Notes: Store measurements with camera info, location, notes, and a photo.
  • Incident Light Meter for iOS 7.0 & Later
  • Digital Silicone Photodiode
  • Hemispherical Diffuser
  • Measuring Range: 0.15-250,000 lux 
Receptor Head Hemispherical diffuser, cardioid-type
Receptor Element Digital silicone photodiode
Measuring Range 0.15-250,000 lux (EV -4 to 20, ISO 100)
Repeat Accuracy ±0.1 EV
Dynamic Range 1:1 000 000
Accuracy <0.6 deltaE, Repeatability: <0.2 deltaE
Measuring range 0.15 – 250 000 lux
Accuracy +/- 3%
Source Draws from iOS device
Power Consumption 10 mW max.
Connection 3.5 mm headset jack
Certifications CE, FCC
Housing Material Stainless Steel, Diffusers: Polycarbonate Lexan
Operating Temperature 14 to 122°F (-10 to 50°C)
Storage Conditions -4 to 140°F (-20 to 60°C)


 (W x H x D)

0.94 x 0.78" (24 x 18 mm)
Packaging  Box Dimension (L xWxH) 5,4X5.0X2.2''
  • Lumu Light Meter for iOS Devices
  • Lumubag Storage Bag
  • Lumuneck Strap

1. FREE Standard Shipping

Free Economy Shipping is available on all orders exceeding R5,000.(T's&C's apply)

*Terms and conditions to qualify for free shipping:

  • Shipping may only be to a physical address within the borders of South Africa. No P.O Box's allowed.
  • Shipping to outlying or remote areas like farms and game reserves may attract an additional fee.
  • The delivery time to city areas is usually between 2 and 4 working days*. This excludes weekends and public holidays

2. Courier Guy Courier Service (local)

We use Courier Guy couriers as our preferred method of delivery.

Your parcel is well packaged and handled with care while in transit.

Delivery Charges:

Shipping charges are all depended on the following:

  • Volumetric and Physical weight
  • Courier Option

If Item is in stock, your item can be delievered between 1-2 Business Days - Main Cities are: Cape Town, Johannesburg, Pretoria, Durban, Port Elizabeth and East London. Other cities/towns will take more than 1-2 delivery time.

If Item is being collected from our suppliers, you item can be deeilevr between 2-7 Business Days - To all areas.

If the item has been pre-ordered for you, this can take anything from 4 - 8 weeks.

*Reckoned from time of dispatch to time of arrival to client. This is an estimate and not guaranteed. This period does not include Saturdays, Sundays and public holidays.

3. UPS Courier Service (International) Please note:

International orders are generally subject to local import duties and taxes (VAT)

DT Film Services is not responsible for, nor can we offer, any specific advice regarding any customs related fees that you may incur. For specific information, please consult with your local government import office.

Privacy: Your privacy is important to us. We strive to exceed your expectations for privacy. Cross-border shipments are subject to inspection by customs authorities. We may also be called upon to provide certain order, shipment, and product information to our international carriers. Carriers may communicate such information to customs authorities for the purpose of facilitating customs clearance and compliance with local laws.

Delivery Charges: 4. Collect from DT Film Services in Durban

You are welcome to place your order online, pay for it and collect it from our Durban branch. You will need to bring in a print out of the order for collection. Please ask for Louise in Sales on arrival.

DT Film Services - Durban

Open: Mon-Fri 8 to 5PM

5 Nunhead Road

Manor Gardens

Durban, 4001

South Africa

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Stock is going in and out all the time, so to be 100% sure that we have an item available, please phone (031) 261-6961 or email