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Oct 5, 2017 07:28:56   #
cthahn
 
When you go to a class do not argue with a instructor. You might consider talking with him after the class if he is receptive.

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Oct 5, 2017 07:36:01   #
jcboy3
 
fotoman150 wrote:
I'm taking basic photography course with my girlfriend at the local community college. She is just getting started so I took the class with her.

The instructor said he saw someone in an outdoor shoot with the flash pointed up and said the flash was useless because none of the light from the flash would hit the subject.

I disagreed with him and said that a small amount of flash would hit the subject.

He said that was incorrect because light traveled in a straight line. At that point I became quiet because I'm trying not to make a know it all out of myself and make him look bad in front of the newbies.

Yes light travels in straight lines but in all directions. That's why photographers use snoots and barn doors. Right?

And that's why Neil Van Niekirk uses the black foam thing when bouncing flash.

Am I right or wrong?

I mean a strobe unit is not like a flash light and even a flash light has some spill over.
I'm taking basic photography course with my girlfr... (show quote)


There are two reasons I shoot with the flash pointed up; either angled up or straight up with a bounce card.

First is if I am getting close to my subject, where the flash can't be turned down enough to avoid overexposure. This is more of a problem with older or cheaper flashes; better flashes have much lower minimum output. But it's always a consideration because flash overexposure is hard to fix.

Second (and most important) is that the flash provides an indication to the subjects that I have taken the picture. Smile, flash, everybody relax. And people usually know if they blinked during the shot, and can request a repeat. Yes, it can be hard to tell quickly whether everyone has their eyes open. I'll take a couple of shots just to be sure, but feedback is always useful.

Which is not to say that's what the person mentioned is doing, but discounting out of hand the usefulness misses the above points.

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Oct 5, 2017 08:14:37   #
billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
 
fotoman150 wrote:
I'm taking basic photography course with my girlfriend at the local community college. She is just getting started so I took the class with her.

The instructor said he saw someone in an outdoor shoot with the flash pointed up and said the flash was useless because none of the light from the flash would hit the subject.

I disagreed with him and said that a small amount of flash would hit the subject.

He said that was incorrect because light traveled in a straight line. At that point I became quiet because I'm trying not to make a know it all out of myself and make him look bad in front of the newbies.

Yes light travels in straight lines but in all directions. That's why photographers use snoots and barn doors. Right?

And that's why Neil Van Niekirk uses the black foam thing when bouncing flash.

Am I right or wrong?

I mean a strobe unit is not like a flash light and even a flash light has some spill over.
I'm taking basic photography course with my girlfr... (show quote)


There are a lot of if's here. If there is something close by that the flash can be bounced from, a building, a bill board, over head projections, etc. If the flash is pointed at even a slight angle it can still fill shadows forward. But it is a lot of if's. Your problem was trying to correct him. Keep your cool, don't correct him, and sit very quietly but close to that girlfriend. When I photographed for newspapers we used an index card and a rubber band on our vivitar 283's, aimed them almost vertical and bounced it. When I did wedding photography out side I did the same thing but upgraded the index card for a nice white piece of plastic, looked better.

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Oct 5, 2017 08:28:00   #
Rongnongno Loc: FL
 
WorldTraveler wrote:
Hmmmmm..... those who think that the know everything about a particular subject irritate the heck of those of us who really do! Lol

Clint

Don't know who the hell you are. I checked your profile and, well noticed, you have me on ignore. A good thing as you seem to be one of those you decry.

You are not an irritant just a minor itch since you make the claim to know it all yourself. One thing you do not seem to know is that you just demonstrated that you are a pompous donkey.

I am glad you selected me to ignore.

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Oct 5, 2017 08:29:15   #
Rongnongno Loc: FL
 
CO wrote:
The light from the flash doesn't come straight out. It depends on the position of the zoom head in the flash. Here is the chart for my Nikon SB-700 chart. The white card is close enough to receive light from the spread of light.

One thing you should notice.... 90 degree is not listed. Ever wondered why?

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Oct 5, 2017 08:57:32   #
dsmeltz Loc: Philadelphia
 
Worst use of a flash I have ever seen was at a middle school presentation. The principal was doing a slide show on a screen and someone was using a flash to take pictures of the screen. This was back in the old BD (Before Digital) I am sure when they later looked at the pictures all they saw was a bright empty screen since their flash would have overpowered the screen image.

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Oct 5, 2017 09:00:49   #
moonhawk Loc: Land of Enchantment
 
Rongnongno wrote:
Don't know who the hell you are. I checked your profile and, well noticed, you have me on ignore. A good thing as you seem to be one of those you decry.

You are not an irritant just a minor itch since you make the claim to know it all yourself. One thing you do not seem to know is that you just demonstrated that you are a pompous donkey.

I am glad you selected me to ignore.



Little short on humor today? The man was being facetious.


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Oct 5, 2017 09:03:54   #
Rongnongno Loc: FL
 
moonhawk wrote:
Little short on humor today? The man was being facetious.


If he was, I missed that.

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Oct 5, 2017 09:05:39   #
mflowe Loc: Port Deposit, MD
 
cyclespeed wrote:
Wow good for you for backing down and remaining mute on the subject. It is so hard not to want to argue a point when you have genuine interest in expressing a fact you know to be true and not a D. Trump style alternate truth.
I see it as both of you have grey shades of correctness. So little of the light would be coming out at 90 degrees that for practical purposes the instructor is correct. However, a very small amount would be reflected / refracted and thus come out at 90 degrees. Just not enough to be used as an affective addition to the lighting on hand.
To test this, set up on a dark night no stars no man made light sources, pitch dark as they say. Have camera with flash pointed straight up. Next at the same height as the camera with flash have a second camera take a bulb exposure directed parallel to ground 100%, horizontal as it were, aimed at a mirror placed so both this recording camera and the one with the flash attached are reflected in it, should there be any light to do so. Now fire the bulb camera, next fire the flash attached camera, then stop the camera with the bulb exposure. Check to see if there is any light recorded on the recording camera ( bulb setting ) I found a very small amount is recorded but not enough to illuminate the recording camera or anything else.
Very good question you asked. Furthermore if the mirror was placed far enough away as mentioned earlier no light would be discerned I do believe.
Wow good for you for backing down and remaining mu... (show quote)


Leave it to a "left-wingtard" such as yourself to bring their snarky petty political opinions into a photography discussion.

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Oct 5, 2017 09:12:08   #
Notorious T.O.D. Loc: Harrisburg, North Carolina
 
Hmmmmmmm, so the 20M watt second flash I am building is not going to allow me to bounce off clouds. Is that what you all are telling me...

Really the bounce card for catch light might make the most sense. Experience and experimentation would rule the day...

Best,
Todd Ferguson

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Oct 5, 2017 09:14:09   #
DaveC1 Loc: South East US
 
I just took one of my flashes outside, pointed it straight up (its daylight now), with the lip of the flash reflector at exactly 90 degrees from my line of sight (no flash card) and fired it. And yes there is some light emitted that reached my eye(s). I suppose the next step would be to rig up a method of measuring just how much light is projected in this situation. Whether its enough light to have any effect of a photo I doubt. But since there is little information on this scenario other than its outdoor and the flash is pointing up who knows for certain.

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Oct 5, 2017 09:23:15   #
dcampbell52 Loc: Clearwater Fl
 
fotoman150 wrote:
I'm taking basic photography course with my girlfriend at the local community college. She is just getting started so I took the class with her.

The instructor said he saw someone in an outdoor shoot with the flash pointed up and said the flash was useless because none of the light from the flash would hit the subject.

I disagreed with him and said that a small amount of flash would hit the subject.

He said that was incorrect because light traveled in a straight line. At that point I became quiet because I'm trying not to make a know it all out of myself and make him look bad in front of the newbies.

Yes light travels in straight lines but in all directions. That's why photographers use snoots and barn doors. Right?

And that's why Neil Van Niekirk uses the black foam thing when bouncing flash.

Am I right or wrong?

I mean a strobe unit is not like a flash light and even a flash light has some spill over.
I'm taking basic photography course with my girlfr... (show quote)


There are a lot of conditions in this situation. What ISO were you shooting at? Where does the flash sync? There could be some spill over but is probably not going to be enough to make a difference in the exposure. HOWEVER, I have been known to put a diffuser dome over my flash and put it off camera as a means of filling shadows. You were both correct and both incorrect. But the correct answer is "it depends". I've been in those situations where the correct response was to keep quiet and see what the results of the shoot were.

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Oct 5, 2017 09:25:56   #
DaveC1 Loc: South East US
 
Rongnongno wrote:
If he was, I missed that.


Its a fairly common humorous phrase in the vernacular since at least the 80s.

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Oct 5, 2017 09:29:59   #
insman1132 Loc: Southwest Florida
 
Thank you for not continuing with the argument in front of the class. I remember sitting in a class many years ago and the instructor made the point that he could change lens on his SLR as fast as under 3 seconds. A guy in class challenged him that it was impossible and kept arguing and the whole instructional evening went downhill from there. Any instructor can make mistakes. You are a gentleman!

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Oct 5, 2017 09:45:54   #
ELNikkor
 
I also have been critical of those who are shooting candids in a very tall gymnasium, with the flash pointed at the ceiling, their shutter speed at 1/250th, aperture f8, wondering why their photos look dark...

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