Min aperture with 200W/400W studio light

[danielyamseng]

Let say I have a small studio 9 feet x 12 feet with most of the working distance at 3-5 feet, what's the smallest aperture that I could work with?

Would that be a case where by I had can't use the smallest apaerture on the lens eventhough the light was set to it's minimum power?

Do you guys know what's the minium power for unit like D-Lite 4 and Bowens Gemini 200W?

[vadim_c]

Let say I have a small studio 9 feet x 12 feet with most of the working distance at 3-5 feet, what's the smallest aperture that I could work with?

Would that be a case where by I had can't use the smallest apaerture on the lens eventhough the light was set to it's minimum power?

Do you guys know what's the minium power for unit like D-Lite 4 and Bowens Gemini 200W?
I understand your question is about largest not smallest aperture ? :-)
I can go to 2.8 with my 400 WS 6 stops range monolights but I rarrely do.

[Lithian]

Keep in mind you can probably add an ND gel to the lights and/or an ND filter to the camera to let you open up even more

[danielyamseng]

No. Let say I shoot at 5 feet at min power. Do the 400Ws light force me to use aperture smaller than f22 at ISO100?

[Lithian]

lets see, the dlite4 has a guide number of 64.3 using a 48 degree reflector and has a range of 1/1 - 1/16th power

so at minimum power it has a guide number of 4. So iso 100, light 1m from subject you'd use f4

[danielyamseng]

If it's with softbox at the same distance I could use f5.6, right?

And if a 200Ws light is use with the softbox, then it should be f4?

[Lithian]

A softbox would rob more power, so it'd probably be somewhere between f2 and f2.8 at minimum power.

One thing to consider with these numbers is that in a small room light will bounce around and can add more light back onto your subject.