Broncolor Flash Pack Bonanza

[Daniel Unkefer]

18x24 Sinar Norma 300 Xenar F4.5 Rembrandt Lighting by Nokton48, on Flickr

[Daniel Unkefer]

Broncolor discontinued product manuals. Broncolor is wonderful for software and product support. And education as well. See here:

https://broncolor.swiss/discontinued-products-manuals

[NormaN]

Broncolor discontinued product manuals. Broncolor is wonderful for software and product support. And education as well. See here:

https://broncolor.swiss/discontinued-products-manuals

Great, thank you Daniel !

[NormaN]

Hello everyone

I have now found time to take my very first shots with strobe light.
An antique stone bust has proven to be ideal because patient.

The setup:

Main light: From the top right about 45° a screen (white coated) at a distance of about 1.5 m
Strobe light Pulso 3200 J

Fill light: A small softbox (approx. 30x60 cm) at a distance of approx. 0.6 m from the left approx. 45°
Strobe light Pulso 1200 J

Camera: Eastman Commercial 8x10

Lens: Rodenstock Sironar 5.6/300

I took a total of 4 shots with 1/125 and measured the following values with the Sekonic:

f 22.0: Main 246 J (6.3) / Fill 30 J (3.3) / t= 1/810, Total Power: 6.5
f 32.3: Main xxx J (7.6) / Fill xxx J (3.3) t= ? , total power: 7.7
f 38.2: 800 J (8.0) Main / 100 J (5.0) Fill t= 1/405, Total Power: 8.2
f 45.2: Main 1054 J (8.4) / Fill 132 J (5.4) t= 1/325, total power: x.x

The Ilford HP5 8x10 negatives were exposed at half box speed, developed in ID11 (20% shorter development) distance lens to bust 70 cm, resulting in a scale of 1:1.33 and an extension factor of 3.0

Everything worked great:
- The Sekonic 756 connected to the Grafit A4 with a cable always triggered
- The shutter has always released correctly via the radio transmitter to the receiver
- BUT: Out of sheer delight with the lightning equipment, I forgot to calculate the extension factor of 3….So the pictures are 3 stops underexposed (resp. since I took the picture with half box speed, 2 stops underexposed?

Does this mean that I would have to at least reach a flash line with f 64 to get a f 22?

[Daniel Unkefer]

Great start NormaN

Yes, two or three stops under you would need f45 or f64 on the meter, assuming only one POP. This is why large format requires a lot of strobe power! If subject is not moving, you can do multiple POPS, as I have done above.

[Daniel Unkefer]

Also, if you find you need MORE light, consider getting another pack 1600 Joules. You could use that with your fill light, full power with your Pulso 2 Head. Then use the Pulso 4 head at full power 3000 Joules, and you will be maxed out in terms of heads/packs. One stop difference between main and fill.

Just sayin'. 1600J packs can be pretty reasonable. I bought two Primo 2 and one Pulso 2 Fifty US Dollars each