Soft Boxes - How do I determine how much I need??

This is the section for general questions and tips about flashes and lighting.

Moderators: Bob Andersson, Thomas, Bjorn van Sinttruije

Soft Boxes - How do I determine how much I need??

Postby len woodruff » Wed Jul 24, 2013 12:23 pm

I have 2 16 inch soft boxes with 105 watt compact florescent bulbs. I am thinking this is about 1000 watts combined.

It doesn't seem to give me enough light for my macro/portrait shots.

How would I determine what I need to get enough light?
len woodruff
 
Posts: 12
Joined: Mon Jul 01, 2013 11:32 pm

Re: Soft Boxes - How do I determine how much I need??

Postby mirageii » Fri Jul 26, 2013 11:49 am

How close to the subject are you positioning the softboxes?
Canon EOS 400D, EF-S 18-55mm, EF 24-105mm f/4L IS USM, EF 50mm f/1.8 MK I, EF-S 10-22mm, EF 70-200mm f/4L IS USM, EF 35mm f/2 IS USM, EF 85mm f/1.8 USM, EF 135 f/2L USM
Canon 430EX II, Manfrotto 055CXPRO3, Arca Swiss P0
Panasonic GX1, Panasonic 20mm f/1.7, Olympus 45mm f/1.8
Canon EOS 30/33 and Pentax MX/ME Super
Rollei 35S

MY FLICKR!
User avatar
mirageii
 
Posts: 389
Joined: Sat Feb 09, 2008 9:06 am
Location: Manchester (UK)

Re: Soft Boxes - How do I determine how much I need??

Postby len woodruff » Fri Jul 26, 2013 12:08 pm

mirageii wrote:How close to the subject are you positioning the softboxes?


Less than 12 inches. I have one point down @ 45 degrees on the left and one parallel pointing directly at the subject.

I take pictures of 1/25 scale cars and their components like engines etc.
len woodruff
 
Posts: 12
Joined: Mon Jul 01, 2013 11:32 pm

Re: Soft Boxes - How do I determine how much I need??

Postby Camron70 » Tue Oct 21, 2014 9:35 am

I have 2 16 inch soft boxes with 105 watt compact florescent bulbs. I am thinking this is about 1000 watts combined. :roll:
You can easily check out our9L0-412 real questions which prepares you EMC You can also get Harvard University real passguide wikipedia the quality examsheets.com Lyndon State College
Camron70
 
Posts: 1
Joined: Tue Oct 21, 2014 9:33 am

Re: Soft Boxes - How do I determine how much I need??

Postby len woodruff » Tue Oct 28, 2014 3:37 pm

Thanks how many bulbs are in each unit?
len woodruff
 
Posts: 12
Joined: Mon Jul 01, 2013 11:32 pm

Re: Soft Boxes - How do I determine how much I need??

Postby Maestro » Thu Oct 30, 2014 1:17 am

You could get a light meter (which usually measure in lumens/lux, BTW, not watts).

Or you could just take a picture and see how many stops you are underexposed. (Keeping in mind that each stop under means you need to double the amount of light(s).)

Or since you're shooting static subjects with a constant light source*, you could just use a longer shutter speed.

Mark

* P.S. although, for macro photography, you generally want to use flashes/strobes, not CFLs.
Maestro
 
Posts: 755
Joined: Wed Apr 08, 2009 2:29 am

Re: Soft Boxes - How do I determine how much I need??

Postby len woodruff » Thu Oct 30, 2014 2:19 am

Maestro wrote:You could get a light meter (which usually measure in lumens/lux, BTW, not watts).

Or you could just take a picture and see how many stops you are underexposed. (Keeping in mind that each stop under means you need to double the amount of light(s).)

Or since you're shooting static subjects with a constant light source*, you could just use a longer shutter speed.

Mark

* P.S. although, for macro photography, you generally want to use flashes/strobes, not CFLs.


Thanks I will try that.
len woodruff
 
Posts: 12
Joined: Mon Jul 01, 2013 11:32 pm

Re: Soft Boxes - How do I determine how much I need??

Postby dubaiphil » Thu Oct 30, 2014 3:53 pm

Shooting at what ISO?

Whatever the ISO, double it, then double it again - hey presto - 4 times as much effective light
dubaiphil
 
Posts: 1831
Joined: Thu Oct 08, 2009 11:24 am


Return to Flashes, strobes and lighting

Who is online

Users browsing this forum: No registered users and 1 guest