Light Metering Using Sekonic Meter

A. Sources of Light

1. Ambient Light (Sun.Moon and lamps)
2. Flash Light

B.
Metering Types

1. Incident Metering (Direct to subject)
2. Reflected Metering (Spot metering)

C.
Metering Mode

1. Ambient Mode
2. Flash Mode
a. Auto reset cordless flash mode (if we don't want to use sync cable)
b. Cord flash mode (when using sync cable)
c. Wireless flash radio trigger mode

When using Flash mode always entering ISO & Shutter speed


Notes:

A.
Camera create appropriate exposure using 3 things:
Exposure Triangle

1. Aperture
2. Shutter speed
3. Iso

B.
Using light meter
1. If We enter Aperture and ISO and light meter give the shutter speed
2. Or we enter ISO & Shutter speed and the meter give the Aperture
3. If in studio we metering strobes , enter Iso and shutter speed so the meter will give us the aperture

JTL s45m Master AC slave bulb

JTL's AC slaves are great tools for providing even fill light in conjunction with your master flash unit. They screw into any standard AC light socket and do not require a sync cord, so you won't need a complicated lighting setup for them to function (although a sync cord can be used with the S-45, if it's needed). The flash tube's long life means that you'll be creating bright, consistent light for years to come. 

Features 

• Output:45WS
• Guide No. (ISO 100, Ft): 90
• Power Supply:AC 110-130V, 60Hz
• Triggering:Slave, Synch Cord & Test
• Synch: Yes
• Flash Duration: 1/1000 – 1/500 Sec.
• Flash Tube Life: About 5000 Cycles
• Recycle Time: 3 Sec.
• Beam Width: ≥ 55°
• Slave Sincerity (Ft): > 35
• Color Temperature: 5600K
• Size: 3" Diameter by 5 1/2" Lon

USD 50.99 By Freestyle photographic supplies

Photogrpahy

1. Knowing your camera & Type of lenses

a.Exterior
b.Interior
c.Menu /Modes
d.Type of lenses
1.
2.
3.
4.
5.
6.

2.
The key factors on photography
a.Lighting
b.Art

3.
The common mistakes and solutions

4.
Glossary and subjects  to know
a. Exposure Triangle
b.Flash Triangle
c.White balance
d.Noise
e.


5.
Acessories
a.Bag
b.Tripod
c.Lens hood
d.LCD Hood
e.Light Meter
f.Filters
g.Reflector
h.Difusser
i.Flash
f.Softbox
g.Umbrella

What is ambient light ?

1. Ambient light 

means the light that is already present in a scene, before any additional lighting is added. It usually refers to natural light, either outdoors or coming through windows etc. It can also mean artificial lights such as normal roomlights.

2. Ambient exposure?

a.Iso

b.Shutter speed

c.Aperture

Basic of flash Photography

https://www.scantips.com/lights/flashpower.html

What is the difference between Lumen,Kevin and watt?

https://www.earthled.com/blogs/led-lighting-faq-frequently-asked-questions/what-is-the-difference-between-lumens-kelvins-and-watts

Understanding Lights

1. https://digital-photography-school.com/understanding-light-better-portrait-photography/

2.https://fstoppers.com/studio/how-read-light-photography-part-1-2544

3.https://www.lightstalking.com/understanding-light/

Luminous Flux vs Lumen

https://gharpedia.com/luminous-flux-vs-lumens-know-difference/

Luminance vs Illuminance

https://sensing.konicaminolta.us/blog/luminance-vs-illuminance/

Seconic Meter Functions

1. Incident metering for Ambient & Flash
2. Measuring LED,HMI and Fluorescent light
3. Measures Tungsten, Flash and Natural Light
4.  Measuring Range -5 to 22.9 EV (Iso 100)
5. Cine Setting : Frame Rate & Shutter Angle
6. 1 degree spot metering with viewfinder
7. 40 degree reflected light metering
8. Photo cine and HD cine metering modes
9. Flash power control and radio triggering
10. Measures virtually any kind of lights
11. Employ SSI (Spectral speciality Index)

a.C 700 U USD 1,199
b.L 858 D U    USD 599
c. L 478 D U USD 339
d. L 308 XU  USD 219
e. C 800  USD 1,599
f. L 478 DR U  USD 379
g. L 478 DR U EL  USD 399
h. L 398 A  USD 218

Flash Exposure Triangle Vs Ambient exposure triangle

Flash exposure triangle

1.ISO
2.Aperture
3.Flash output power

Ambient Exposure Triangle
1. Iso
2.Aperture
3.Shutter Speed

1. Photovision 14 " Pocket one shot digital target
2. Lense Hood
3.LCD Hood
4.Camera cage

Flash Exposure compensation

https://neilvn.com/tangents/flash-photography-techniques/flash-exposure-compensation/