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What is the benefit of add on flashes?
What is the benefit of having one of those add on flashes that mount to the top of the camera? Does it change the angle of the light hitting the subject preventing glare in the eyes?..

Comments (20)

Thurnau wrote:.

What is the benefit of having one of those add on flashes that mountto the top of the camera? Does it change the angle of the lighthitting the subject preventing glare in the eyes?.

Since accessory flashes are further from the camera lens than the flash that's in the camera, it has less tendency to cause "red-eye", which is a reflection from inside of people's eyes. So you're right, that's one thing they're good for..

Also, most (all?) separate flashes are more powerful than built-in ones, so you can take pictures at longer distances or lower exposure indices..

What I find most useful is that you can "bounce" accessory flashes: aim the light at the ceiling so you get a softer look without ugly shadows behind the subject. I wouldn't get an accessory flash that didn't have bounce capability..

Leonard Migliore..

Comment #1

I was at a FedEx NBA dinner last night with Peja from the hornets. There was a professional taking photos there in he appeared to be bouncing light off the ceiling too.Does the accessory flash help with glowing eyes on pets?..

Comment #2

Thurnau wrote:.

I was at a FedEx NBA dinner last night with Peja from the hornets.There was a professional taking photos there in he appeared to bebouncing light off the ceiling too.Does the accessory flash help with glowing eyes on pets?.

No, for that you need an exorcist..

Leonard Migliore..

Comment #3

You know what I mean right? The flash hits the dogs eyes or a cats eye and they glow intensely with the flash? Does raising the flash an extra inch solve that problem?..

Comment #4

Thurnau wrote:.

You know what I mean right? The flash hits the dogs eyes or a catseye and they glow intensely with the flash? Does raising the flash anextra inch solve that problem?.

You already have the answer.

Since accessory flashes are further from the camera lens than the flash that's in the >camera, it has less tendency to cause "red-eye", which is a reflection from inside of >people's eyes. So you're right, that's one thing they're good for.".

Bounce the flash, there will be no 'red-eye'.Rafy Sugirihttp://www.flickr.com/photos/rafysugiri/sets/http://bighugelabs.com/flickr/dna.php?username=79015415@N00.

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Comment #5

Depending on features of the flash:.

Greater flash range (distance to subject)Greater angle of coverage (for use with wider angle lenses)Flash exposure compensationStroboscopic flashBounceSwivelFaster flash recycle timesExternal power options.

Greater number of flashes (using more batteries or batteries with greater capacity)Wireless multiple-flash setup with automatic flash exposure/ratios.

Moving flash off-camera with cord from camera hot-shoe to flash base (changing angle of flash or keeping flash centered over lens via flash bracket).

... in addition to increasing lens-axis to flash head distance to decrease red-eye.

Thurnau wrote:.

What is the benefit of having one of those add on flashes that mountto the top of the camera? Does it change the angle of the lighthitting the subject preventing glare in the eyes?.

Galleries: http://www.dheller.net.

Many folks on dpreview.com list their equipment here, but don't list any links to their images. Do they collect equipment? Or take pictures?..

Comment #6

Leonard Migliore wrote:.

Thurnau wrote:.

I was at a FedEx NBA dinner last night with Peja from the hornets.There was a professional taking photos there in he appeared to bebouncing light off the ceiling too.Does the accessory flash help with glowing eyes on pets?.

No, for that you need an exorcist..

Leonard Migliore.

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NYAAA~!!!.

D100's built-in flash.Features:1. Reveals pets that have been possessed.2. Give you sleepless nights...

Comment #7

Another advantage is the elimination of lens shadow. Some DSLR lenses block part of the flash from the on-camera flash, this produces a noticeable shadow..

Best regards,Doughttp://pbase.com/dougj.

Http://thescambaiter.comFighting scammers WW for fun & justice..

Comment #8

And the Canon units are very expensive!.

Best regards,Doughttp://pbase.com/dougj.

Http://thescambaiter.comFighting scammers WW for fun & justice..

Comment #9

Stick to Vivitar's 285HV. You'll learn more about photography that way. Don't get spoiled by the technologies before you know the basic .

Doug J wrote:.

And the Canon units are very expensive!.

Best regards,Doughttp://pbase.com/dougj.

Http://thescambaiter.comFighting scammers WW for fun & justice..

Comment #10

Rollakid wrote:.

Stick to Vivitar's 285HV. You'll learn more about photography thatway. Don't get spoiled by the technologies before you know the basic.

Thanks for the thought, but I do well with flash photography. Perhaps you intended to reply to a different post..

Best regards,Doughttp://pbase.com/dougj.

Http://thescambaiter.comFighting scammers WW for fun & justice..

Comment #11

Doug J wrote:.

Rollakid wrote:.

Stick to Vivitar's 285HV. You'll learn more about photography thatway. Don't get spoiled by the technologies before you know the basic.

Thanks for the thought, but I do well with flash photography. Perhapsyou intended to reply to a different post..

Best regards,Doughttp://pbase.com/dougj.

Http://thescambaiter.comFighting scammers WW for fun & justice.

Erm.. no offense and the post is not directed at you. Just some thoughts to everyone who might read along what everyone is saying here..

When you say Canon flashguns is expensive it hits me that the reason they are expensive is that they are very advanced and make photography easier and faster compare to non dedicated manual flash. I should know better since I shoot fashion show (for charity, not really professional) and it is hard..

On the other hand, it let me learn more about the basics of photography. I've talked to some who own powerful flashguns about guide numbers, hoping to learn something from them but they just tell me that everything is automatic..

At least I know someone with an 580ex and he shoots in manual. He seems to be like me who shoot photo for fun and hobby, not to earn a living. I hope everyone gets what I mean by now, and it's fun, at least to me, to try out things manually...

Comment #12

Thurnau wrote:.

I was at a FedEx NBA dinner last night with Peja from the hornets.There was a professional taking photos there in he appeared to bebouncing light off the ceiling too..

That's only the case if the ceiling was pretty low..

He may have had a flashhead-mounted bounce/reflector..

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Comment #13

The clear cover of the flash was tilted upwards, but there was not a folded piece of paper attached. The ceilings were very high in the building. I wasn't close enough to talk to him about it, and he was there on business so I left him alone. I wanted to ask him some things, but felt out of place to...

Comment #14

If the ceiling is high, bouncing isn't going to do much, if anything. So, who knows what he was up to...

Comment #15

Hi,.

One of the advantages is that you can leave them at home when not needed and, in some cases, not buy them either..

Seriously, the little pop-up ones are OK for fill in but need a bit of cigarette paper over them for a diffuser and, of course, give nasty red-eye which is a pita to remove. Only Panasonic and Leica have ever made a pop-up one that people can take seriously..

So you buy a flash gun and can get it to whatever spec. you like/need/can afford. Simple as that. especially as some come with all manner of fittings for normal bounce off of ceilings, sideways bounce for off of walls and gadget bounce for when you need an artificial ceiling as the real one is too far away or painted yellow etc..

And some have zoom heads so all the light can be spread out to cover from (say) 28mm to 100 mm or so. And diffusers, and so on. And some can be linked to use two flash guns. And work on half or quarter power..

And you can get long leads for them and hold them out to the side and high up, and so on..

Plus, when you change the camera for this year's wonder; you can keep the flash gun and just buy an adapter or else go on using the 3mm co-axial plug..

Lastly, they have their own batteries (often AA's - another good point) and so don't eat up the camera's mini ones..

Regards, David..

Comment #16

By cigarette paper do you mean clear plastic cellophane? Or those old fashioned roll your own cigarette papers that are white?..

Comment #17

Paper, of course. You don't want to look like an amateur, do you?.

Regards, David..

Comment #18

Snycer wrote:.

If the ceiling is high, bouncing isn't going to do much, if anything.So, who knows what he was up to..

Depends what you mean by high ceilings of course..

Canon's smaller flash, for example, has a guide number of 43 (metres). However this is the guide number with the flash, which has a zoom head, set for a 105 mm lens. Let's use a more typical 50 mm lens, for which the manual gives a guide number of 34. The equation needed to calculate the maximum distance covered is:.

(guide number/f-number) x sqrt(ISO speed/100).

If we are bouncing off the ceiling, the distance is flash to ceiling to subject; also we must make some allowance for the fact that the ceiling is a far from perfect reflector - say one stop..

Let's assume a modest f/4 lens, and ISO 400 which should be ok with any modern DSLR. But we'll feed f/5.6 into the equation to allow for the one stop loss mentioned above. So distance = (34/5.6) x 2 = 12 metres. Conservatively, that will mean a maximum ceiling height of 4-5 metres or 13-16 feet. Pretty high for any ordinary room and ok for many function rooms. But for a bigger, grander room or one with a dark ceiling - forget it...

Comment #19

Endless. Seriously. Pick up a portfolio shot with off-camera flashes and see the difference..

Http://exnophoto.com.

The blog: http://Exno.Blogspot.com..

Comment #20

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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