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Archive 2017 · Streaklight 360 Metering Numbers For Ref

  
 
jlafferty
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p.1 #1 · p.1 #1 · Streaklight 360 Metering Numbers For Ref


Noticed PCB has an "expected output" chart on their site, metered at 5 and 10ft. So, I made a first pass at metering the Streaklight 360 today at 10 feet, ISO100, 1/200th to see where it falls in the lineup.

I chose these three power settings as, for my uses, they represent the three typical scenarios: greatest output; best output vs. recycle time compromise; highest power where instant recycle first appears. TBH I am usually shooting somewhere at 1/8 to 1/16 power for my key; 1/32 to 1/64 fill for full length. I'll meter more mods and add to the list as time allows.

1/1 power - 3 seconds +/- recycle
Reflector: 14
Reflector SD: 13
Reflector DD: 11
Beauty Dish: 11
BD and sock: 7.1
Softlighter with reflector: 5.0


1/2-7 power - "near instant" recycle
Reflector: 9.0
Reflector SD: 8.0
Reflector DD: 7.1
Beauty Dish: 7.1
BD and sock: 4.5
Softlighter with reflector: 3.2


1/4-3 power - instant recycle
Reflector: 8.0
Reflector SD: 6.3
Reflector DD: 5.6
Beauty Dish: 5.6
BD and sock: 4.0
Softlighter with reflector: 2.5


BD "beauty dish" // SD "single diffusion" // DD "double diffusion"




Feb 19, 2017 at 09:37 PM
jlafferty
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p.1 #2 · p.1 #2 · Streaklight 360 Metering Numbers For Ref


Tested again today, being even more intentional. ISO 100, 1/1 power, Streaklight 360 in a Softlighter bare bulb:

At 10ft, four times I got f/5.6

At 5ft, four times I got f/9.0



Feb 25, 2017 at 08:51 AM
jlafferty
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p.1 #3 · p.1 #3 · Streaklight 360 Metering Numbers For Ref


More figures... this time, instead of handholding the meter, I put it ontop of an apple box and in line with the center axis of each modifier, with a measuring tape at 5 and 10ft.

Recycle times (guesstimated using “1 mississippi”)
1/1 power: around 3.5 secs
1/2 power: 1.5-1.75 secs
1/2-7 power: 1/3rd sec, or just “1 miss”
1/4 power: 1/6th sec, “near instant”
1/4-3 power and below: instant

All measurements taken at ISO 100, 1/200th using a Sekonic L358, level and on axis with center of modifier; distance measured from the front face of each mod
Each measurement taken 5 times for consistency with dome recessed
SD: single diffusion disc
DD: double diffusion disc
E.u: light level is below what can be measured by the meter


46” PHOTEK SOFTLIGHTER - 10FT
1/1: 6.3
1/2: 5.0
1/2-7: 4.0
1/4: 3.6
1/4-3: 3.2
1/8: 2.5
1/16: 2.0
1/32: 1.4
1/64: 1.1
1/128: E.u

46” PHOTEK SOFTLIGHTER - 5FT
1/1: 10
1/2: 8.0
1/2-7: 6.3
1/4: 5.6
1/4-3: 5.0
1/8: 4.0
1/16: 2.8
1/32: 2.0
1/64: 1.4
1/128: 1.1


MEDIUM CHIMERA 36x48” WHITE - 10FT
1/1: 6.3
1/2: 5.0
1/2-7: 4.0
1/4: 3.6
1/4-3: 3.2
1/8: 2.5
1/16: 1.8
1/32: 1.3
1/64+3: 1.0
1/64: E.u

MEDIUM CHIMERA 36X48” WHITE - 5FT
1/1: 11
1/2: 9.0
1/2-7: 7.1
1/4: 6.3
1/4-3: 5.6
1/8: 4.5
1/16: 3.2
1/32: 2.2
1/64: 1.4
1/128: 1.1


BARE REFLECTOR - 10FT
1/1: 16
1/2: 13
1/2-7: 10
1/4: 9.0
1/4-3: 8.0
1/8: 6.3
1/16: 4.5
1/32: 3.2
1/64: 2.2
1/128: 1.6

BARE REFLECTOR - 5FT
1/1: 32
1/2: 25
1/2-7: 20
1/4: 18
1/4-3: 16
1/8: 13
1/16: 9.0
1/32: 6.3
1/64: 4.5
1/128: 3.2


REFLECTOR SD - 10FT
1/1: 14
1/2: 11
1/2-7: 9.0
1/4: 8.0
1/4-3: 7.1
1/8: 6.3
1/16: 4.5
1/32: 3.2
1/64: 2.0
1/128: 1.4

REFLECTOR SD - 5FT
1/1: 29
1/2: 20
1/2-7: 18
1/4: 16
1/4-3: 14
1/8: 11
1/16: 8.0
1/32: 5.6
1/64: 3.6
1/128: 2.8


REFLECTOR DD - 10FT
1/1: 13
1/2: 10
1/2-7: 8.0
1/4: 7.1
1/4-3: 6.3
1/8: 5.0
1/16: 3.6
1/32: 2.5
1/64: 2.0
1/128: 1.3

REFLECTOR DD - 5FT
1/1: 25
1/2: 18
1/2-7: 16
1/4: 14
1/4-3: 13
1/8: 10
1/16: 7.1
1/32: 5.0
1/64: 3.2
1/128: 2.5


BARE BULB NO REFLECTOR - 10FT
1/1: 6.3
1/2: 5.0
1/2-7: 4.0
1/4: 3.6
1/4-3: 3.2
1/8: 2.8
1/16: 2.0
1/32: 1.6
1/64: E.u

BARE BULB NO REFLECTOR - 5FT
1/1: 10
1/2: 8.0
1/2-7: 7.1
1/4: 6.3
1/4-3: 5.6
1/8: 4.5
1/16: 3.2
1/32: 2.5
1/64: 1.6
1/128: 1.1




Feb 27, 2017 at 11:12 AM
jlafferty
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p.1 #4 · p.1 #4 · Streaklight 360 Metering Numbers For Ref


Incidentally, I also tested the color temp drift as power moves from 1/1 to 1/64th using an XRite Color Checker. It warms as power is lowered, by a total of around 370K:

1/1: 5901K
1/2: 5926K
1/4: 6082K
1/8: 6152K
1/16: 6162K
1/32: 6197K
1/64: 6271K

In practical use this means for me a 1/4th CTB on my fill, which cools the light by 300K.

Edited on Feb 27, 2017 at 12:58 PM · View previous versions



Feb 27, 2017 at 11:19 AM
PhotoMaximum
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p.1 #5 · p.1 #5 · Streaklight 360 Metering Numbers For Ref


Great info...


Feb 27, 2017 at 12:24 PM
jlafferty
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p.1 #6 · p.1 #6 · Streaklight 360 Metering Numbers For Ref


I'll keep adding as I find quirks. I love these lights but it's best to be forewarned against issues.


Feb 27, 2017 at 12:58 PM
kaplah
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p.1 #7 · p.1 #7 · Streaklight 360 Metering Numbers For Ref


jlafferty wrote:
Incidentally, I also tested the color temp drift as power moves from 1/1 to 1/64th using an XRite Color Checker. It warms as power is lowered, by a total of around 370K:

1/1: 5901K
1/2: 5926K
1/4: 6082K
1/8: 6152K
1/16: 6162K
1/32: 6197K
1/64: 6271K

In practical use this means for me a 1/4th CTB on my fill, which cools the light by 300K.


I did a similar test, using the same target you did, on and AD360II (from Adorama, whatever their designation is for it). Temp showed much more stable:

1/1 5750
1/2 5800
1/4 5800
1/8 5850
1/16 5850
1/32 5900
1/64 5750
1/128 5750

I don't know if the -II model has differences from the original (other than TTL), or if this is just sample variation.





Feb 28, 2017 at 08:56 AM
jlafferty
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p.1 #8 · p.1 #8 · Streaklight 360 Metering Numbers For Ref


Compare output against either the B800 or DB800 at 320-330ws:







A more complete picture, raw output aside:

The Bees get you a much faster recycle time at full power - 1 sec vs. 3.5 sec. They might be more color temp stable, but I'm not sure - would love to see someone with them weigh in. Likely shorter flash duration, but I'm just guessing. Option to shoot on AC power.

The Streaklights, on the other hand, are: cheaper (especially when on sale), lighter (much lighter battery depending), smaller and do HSS which, in my use, offsets the flash duration advantage the Bees might have.

Modifiers available, I'd place them even.



Feb 28, 2017 at 09:13 AM
jlafferty
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p.1 #9 · p.1 #9 · Streaklight 360 Metering Numbers For Ref


Thanks for doing this. Do you know whether the Streaklights are 360 II's or just 360s?

kaplah wrote:
I did a similar test, using the same target you did, on and AD360II (from Adorama, whatever their designation is for it). Temp showed much more stable:

1/1 5750
1/2 5800
1/4 5800
1/8 5850
1/16 5850
1/32 5900
1/64 5750
1/128 5750

I don't know if the -II model has differences from the original (other than TTL), or if this is just sample variation.






Feb 28, 2017 at 09:26 AM
jlafferty
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p.1 #10 · p.1 #10 · Streaklight 360 Metering Numbers For Ref


Interesting... I think the Streaklights are based on the original Witstros and not II's, simply based on control layout and screen size. Hmm...






Feb 28, 2017 at 09:30 AM
jlafferty
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p.1 #11 · p.1 #11 · Streaklight 360 Metering Numbers For Ref


Err, then again... the TTL Canon/Nikon Streaklights look exactly like the Godox Witstro 360 IIs:



The More You Know...



Feb 28, 2017 at 09:37 AM





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