November 22, 2014, 05:44:30 AM

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Messages - keithfullermusic

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1
Lighting / Re: Studio Light Power Question?
« on: Today at 03:58:22 AM »
I am not very experienced with studio lights but I've researched them a bit in the last few months and I would like to add a couple comments.

First is that from my understanding, the Ws rating is not really a normalised and directly comparable measure. It should be comparable within a given brand, but might not be between brands. For example, the light output from similarly rated lights might differ because of the tube and electrics\electronics efficiency, reflector geometry and reflector efficiency.

Second, because your actual flash has 5 stops does not mean that a lower powered flash will also have five stops. You might pretty well have a 4 stops 250Ws light that has the same minimum output as your larger strobe. Apparently, the actual precision and range of adjustment appears to be one of the most evident compromise of cheaper strobes.

I didn't really think about that - different brands having different ratings, but it makes sense.  Fortunately, I have two Bowens 500R's and I'm thinking about getting the 250R's to go along with them.  I would imagine that they would have similar performance, only the 250's would be a stop dimmer at both ends compared to the 500's - the 500s are 15-500, and the 250s are 7-250.

2
Lighting / Re: Studio Light Power Question?
« on: November 21, 2014, 09:18:27 AM »
You have 5 stops of adjustment over a six stop range. For example if you are at full power, 500Ws, you can come down five stops to 15Ws. The settings on the flash would be :Stops dial 1, Tenths dial 0.0, for 15Ws, now go up to 5 on the Stops dial and you have gone up four stops, then go to the Tenths dial and go up 0.9 stops for a 4.9 stop adjustment range across a 5.9 stop output range.

If they had a zero on the Stops dial and you could input just 0.1 on the Tenths dial you would have full adjustment range of your actual output range.

You are right, the numbers are straightforward, 400Ws is close to 1/3 stop less than 500Ws and 250Ws is one stop less than 500Ws.

great - thanks for the clarification.  i was debating getting a 250W light for the background.  I often find that even with my main lights turned up all the way, and the background light turned down all the way - the BG is still too bright.  this is because i often have large modifiers on my main lights (which eats up the light), and just a standard reflector on the BG.

a 250W light should essentially be 1/2 the brightness at its lowest stop compared to the 500W at its lowest stop, which would be great.  I would also assume that the 250W at full power would be the same thing as my 500W at one stop below full power.  clearly, the recycle time on the 250W is going to be slower, but I think it will be ideal.

3
Lighting / Re: Studio Light Power Question?
« on: November 21, 2014, 09:14:06 AM »
I have this site bookmarked as it has a lot of good information.  I hope it helps you too.

http://www.scantips.com/lights/flashbasics2.html

In your example (1-6) that does represent 5 stops as there are five increments between 1 and 6.

thanks for the link.  it was very informative.

4
Lighting / Studio Light Power Question?
« on: November 21, 2014, 08:29:18 AM »
So, I have have two Bowens 500R studio lights.  They are rated at 15Ws-500Ws over 5 stops.  But what exactly does that mean?

To me I'm guessing that every time a turn it up a stop, it doubles the Ws - but I might be wrong.  I would think that it actually has 6 stops which go as follows:

1 - 15Ws
2 - 30Ws
3 - 60Ws
4 - 120Ws (roughly 125)
5 - 240Ws (roughly 250)
6 - 480Ws (roughly 500)

I should also note that I have two dials:

The first is for complete stops (1-5)
The second is for 1/10th stops (0-1)

It actually goes up to 6 (the full stop dial turned to 5, and the 1/10 dial turned up to +1.0), so did Bowens list that incorrectly?


THEN, that leads to my next question - how much dimmer are the 400W and 250W lights?  Is the 400W less that 1 stop at full power compared to the 500W, and is the 250W exactly one stop less than the 500W at full power?

I only ask because I'm looking to get a two more lights, and I want to keep my options open.  Thanks.

5
i am posting just to see how many squares i have.

6
Lenses / Re: More EF 100-400 f/4.5-5.6L IS II Talk [CR2]
« on: October 28, 2014, 12:38:35 PM »
i'm not sure how "quite a bit smaller" is dependent on the photographer?  either way, i bet a lot of people are waiting for this lens.  i have the old one, and while it's not perfect, it's still sweet.

7
EOS Bodies - For Stills / Re: So what makes a camera a "pro" camera?
« on: October 18, 2014, 06:03:35 AM »
http://www.k2focus.com I'm currently updating it, but the layout is done.
Did you post this in the wrong thread?  Looks like it belongs in the "show your website" thread

Ha,  you're right. Sorry about that.

8
Portrait / Re: Post photos of other photographers in action
« on: October 15, 2014, 08:31:21 AM »
a couple more of a friend of mine when i was living in michigan.  the one in the building is the packard plant in detroit.


9
Portrait / Re: Post photos of other photographers in action
« on: October 15, 2014, 08:21:33 AM »
i took this one of a buddy of mine when he came to visit us in glasgow

10
EOS Bodies - For Stills / Re: So what makes a camera a "pro" camera?
« on: October 15, 2014, 07:45:00 AM »
A pro level camera must have:

1) a sensor with 14+ stops of DR
2) the ability to shoot 4K at 120fps minimum
3) the ability to take clean shots of the back of the lens cap
4) the highest score possible on DxO
5) the ability to post to Facebook
6) the ability to find jobs
7) a price of at least $3,500

I'm sure i forgot a few things, but that's what I consider the bare minimum of a "Pro-Level Camera."

11
Photography Technique / Re: My wedding photography job.
« on: October 15, 2014, 07:38:34 AM »
i'm curious - you bring all that stuff to every wedding?

i do lots of weddings, and use a combination of 3-5 lens and a single flash.  i carry extra flashes, umbrellas, reflectors, a tripod, backup camera, and a few other things in the car, but i almost never need them.

i'm not going to tell you how to do weddings - only you know what you need to bring with you - but i really think you should think about leaving 90% of that stuff behind.  i'm telling you right now that there is no possible way i'd be able to move around and grab the shots that i like if i had to carry a professional studio on my body everywhere i went.

having an assistant is great, and i never shoot weddings alone, but i think you should seriously consider "packing lighter."

12
Canon General / Re: More Canon Lens Mentions [CR2]
« on: October 11, 2014, 11:56:27 AM »
just out of curiosity, who would want this lens?  11mm on FF is super wide, probably way too wide for many people to ever really find that useful.  i guess it would be cool sometimes for events, but even then I don't think people would be using it at the 11mm end all that much.  and with the bulb design you can't use filters, so are there many landscape people that would want this? 

i'm not shocked by the price, seeing as this is the new Canon trend that's here to stay.  also, it's a lens that no one else has or probably will have for a long time.  i just think that it's more of a "fun" lens than a useful one, and for $3,000 I don't see too many people jumping for it.  however, there always seem to be enough people out there who end up buying this stuff.

13
Here are some I did this week.  I took the Perrier one in portrait, but added the right section seen in the landscape version in Photoshop.

Wonderful

Thank you.  I just got into this type of photography.  There are some nice shots on this thread.  Here is one I did last night.




14
Here are some I did this week.  I took the Perrier one in portrait, but added the right section seen in the landscape version in Photoshop.

15
EOS Bodies / Re: Canon Says Higher Resolution Sensors Are Coming Soon
« on: September 25, 2014, 08:16:20 PM »
Out of curiosity, is it possible to put a nikon sensor on a canon camera?

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