Question about Canon EOS 400D / Rebel XTi Digital Camera

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Err99 and busy flash

Camera works fine if flash is not needed. Try to use the flash right away get few strobe flashes and the busy flash sign pops up goes away try again same result eventually the dreaded err 99 message comes up. I have tried power off/on re-installing battery, and cleaning lens contacts. Nothing works just wondering if i now have a camera paperweight.

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  • 164 Answers

Per the problem description, it seems the flash circuitry has a malfunction.

In order to perform a correct diagnostics and repair of it, it is necessary to open such camera and perform it by a qualified camera repair technician.

If it's under warranty, I do recommend you to send it back to make valid the warranty.

If not, then you have the options of pay for its repair, or do it yourself if you are willing tgo open it and perform some basic diagnostics of the failure. You will need tools to do it, which includes the usage of a soldering iron.

Best regards,

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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Err99 when taking pics in sun. Taking in side with flash fine, pics outside at night are fine?


Error code 99 indicates detection of a system malfunction. Try switching on the camera and while it is still switched on remove the battery. Leave it for about 30 secs then re-insert the battery once powered up switch the camera off wait 30 secs then switch it on again. This action sometimes will remedy this problem but failing that it may need a visit to the repair shop.

Sep 20, 2014 | Canon EOS-20D Digital Camera

1 Answer

I have a cannon rebel xt and when the flash pops it it will no longer take a photo but works fine outside if flash is not needed?? Help


Does the little flash lightening bolt light up in the viewfinder to let you know the flash is fully charged? If it does, but when you push release it goes out and then comes on again in a few seconds that is the sign of a bad flash board.

Does the flash go all the way up?

Is the switch that is under the flash come all the way up (not stuck down)?

Mar 12, 2013 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

Ttl auto does not work


Digital Camera Fully Compatible, Newly Developed S-TTL System "S-TTL" enables TTL auto shooting by an external strobe for a digital SLR camera as well as for a point & shoot digital camera.
INON S-TTL auto strobe supports any manufactures' model providing highly accurate exposure control.
Film camera era without strobe selection problem TTL stands for "Through The Lens" and TTL auto strobe system controls flash amount to provide correct exposure based on calculation by camera's internal sensor metering reflecting strobe light from a subject through the lens. This TTL system meters actual light amount reflecting from a subject providing accurate exposure.
When we start with the history of underwater TTL auto strobe, underwater camera?"NIKONOS V" released in 1984 was the first to provide automatic TTL flash control for underwater strobe SB-102, SB-103 succeeded by NIKONOS V compatible underwater strobes form other manufactures. The 5 pin electrical sync connector for NIKONOS V is most popular and widely adopted to connect an underwater strobe and underwater film camera (underwater camera/housing).
A film SLR camera has flexibility to select an underwater strobe. As far as housing has NIKONOS type electrical sync connector and properly wired, automatic TTL flash control is usable with any TTL auto strobe like Nikon SB-105, INON Z-220, Z-22 connected via electrical sync cable.
NIKONOS type 5 pin electrical sync connector and NIKONOS V with INON Z-22 strobe
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Film camera compatible strobe is not usable for a digital camera!? Underwater TTL strobe circumstances have been drastically altered with the spread of digital camera among divers. Some underwater housing for digital SLR camera has NIKONOS type electrical 5 pin sync connector as same as film camera housing. Since the housing has same NIKONOS type sync connector, existing film camera compatible underwater strobe has been considered compatible with a digital SLR camera via 5 pin sync cable but happened to experience error message on the digital camera or blackout on an image even the strobe worked. Why this happened?
This is because automatic TTL strobe system difference between a film camera and a digital camera.

The film TTL auto system makes single flash while digital TTL auto system employs pre-flash type making two to three flashes. Film TTL auto strobe system starts firing at the same time the shutter opens and reflecting strobe light from a subject is recived at a film. The reflecting light on the film is metered by the sensor to determine when to cease firing for correct exposure. This process takes only about 1/1000 second.
In contrast, digital TTL auto strobe system can not calculate adequate exposure based on reflecting light from a subject since image sensor (CCD/CMOS) reflectivity is comparably low comparing to a film. So digital TTL strobe system gives preliminary flash for very short period of time (pre-flash) just before the shutter opens metering reflecting light from a subject by the sensor to calculate necessary amount of light for correct exposure and starts emitting main flash at the same time the shutter opens. Canon E-TTL and Nikon i-TTL employs this system.

When we connect conventional film camera compatible TTL strobe to pre-flash type digital SLR via sync cable, the strobe makes full dump by pre-flash signal then the shutter opens before the strobe has been fully charged resulting in quite under exposed image only with ambient light. Even two time flash compatible strobe like INON Z-220 strobe, does not fully support a digital TTL and force to use Manual flash mode.





Film SLR:
A strobe starts firing at the same time the shutter opens and quenches firing when correct exposure has been obtained.
A film compatible TTL strobe connected to a pre-flash type digital SLR via electrical cable flashes does not support TTL auto exposure resulting in synchronization only with first pre-flash or totally uncontrollable.
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The birth of digital fully compatible S-TTL S-TTL auto compatible INON D-2000 strobe and Z-240 strobe works in TTL auto mode by simply setting their main dial to S-TTL position. A film camera seems to depend more on photographer's skill, experience and feel since the camera does not allow checking images on site. A digital camera allows us to check images right after shooting and enable to try to shoot again as much as we like. And high capacity memory card further allows to shoot hundreds of images. The digital camera makes entry level of underwater photography getting down and nowadays more people buy a digital SLR camera and underwater housing even they have just started underwater photography. However underwater photography gets more difficult because underwater strobe does not work in TTL auto.
INON is among the first to support digital TTL auto system with "S-TTL" auto mode equipped D-2000 strobe and Z-240 strobe.
The proper name of S-TTL is "Optical Synch TTL". S-TTL enables to perform in TTL auto exposure as same as genuine TTL strobe from camera manufacture, based on camera's built-in flash light to use as a signal to be transmitted to a strobe. S-TTL uses digital camera's built-in flash light not as a light source but as like a controller to trigger S-TTL strobe.
The built-in flash of a digital camera makes weak flash (pre-flash) before main-flash to calculate exposure. This pre-flash is transmitted to S-TTL strobe to control the strobe to make pre-flash to a subject. The reflecting light from the subject goes through the camera's master lens to an image sensor then a processor calculates main flash light amount for correct exposure.?Finally the built-in flash makes main-flash which is transmitted to the S-TTL strobe to cause main-flash of the S-TTL strobe.


Digital camera's built-in flash lights are transmitted via an optical fiber to the
S-TTL strobe to make pre-flash and main-flash instead of the built-in flash.
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Apr 30, 2010 | Olympus FL-20 TTL Flash

2 Answers

Canon rebel xt eos


Error 99 means lens communication error.
Try to clean the contacts on both sides.
and re-install lens

Jun 25, 2009 | Canon Rebel XT / EOS 350D Digital Camera

2 Answers

Using exturnel flash


Already answered by me in another question by you...

The "error 99" is a general error on Canon cameras meaning "something's gone wrong and I don't know what to do about it". If you get them all the time, the camera is effectively dead and must go back to Canon for a service repair (circa £175 if I remember correctly).

If the error 99 only happens when you try to pop up the flash, but otherwise the camera can take good pictures, then yes, an external flash unit could well solve your problem. With an external flash on the hot-shoe, the internal flash is completely bypassed and the camera will never try to pop it up.

I recommend taking your camera to a shop such as Jessops and ask to try out a flash gun to be sure.

Feb 01, 2009 | Canon Rebel XT / EOS 350D Digital Camera

3 Answers

Using a speedlight sb800 off camera on a Nikon d80


Found a great website that explains this since it's not in any of the manuals or other websites I have searched for so long!

http://www.kenrockwell.com/nikon/ittlslave.htm

HOW TO DO IT
This covers the D70 and SB-600 which I use personally. It should be similar on other cameras. Any questions? Presuming you have USA equipment, call (800) NIKON-UX for details.
On your D300:
Press MENU.
Move up or down to: PENCIL menu.
Move right and down to: e Bracketing/Flash
Move right and down to: e3: Flash cntrl for Built-in Flash
Move right and down to: C Commander Mode

On your D70:
Use P, S, A or M exposure mode.
Press MENU. Go to the yellow wrench menu, and be sure CSM MENU is set to DETAILED. Otherwise you won't see the next setting!
Go to the CSM menu which looks like a purple pencil. Set #19, Flash Mode, to "COMMANDER MODE." Further click to the right to set the commander mode to "TTL."
You also may set the commander mode to Manual or AA, which are other modes to fire the remote flash. The SB-600 only works with TTL and Manual. You set the manual power level at the camera.
Don't forget to POP UP THE BUILT-IN FLASH!
On your D200:
Press MENU.
Move up or down to: PENCIL menu.
Move right and down to: e Bracketing/Flash
Move right and down to: e3: Built-in Flash
Move right and down to: C Commander Mode
Move right to get to a confusing panel of C Commander Mode settings.
Once in this confusing panel you can set everything for two external groups of flashes and the built-in flash. You move between the different fields by moving left and right, and set any field by toggling up and down.
In this panel you must select Channel, and set it to 3. Default is 1, which is the default for the SB-800. Don't ask me why they are different. Default for the SB-600 flash is channel 3, so if you forget this it won't work! Sorry about the complexity; Nikon didn't ask me for help here.
This is such a pain I use one of the D200's setting banks to store this.
On your SB-600:
Hold down ZOOM and "-" together to enter the CSM settings. That's why you see a gray "CSM" marking between those two buttons.
Press either the + or - buttons until you see an icon that looks like a wiggly Z-shaped arrow. This arrow refers to wireless communication between the flash and camera. When you see the wiggly arrow, press MODE to make it say ON.
Press ZOOM and "-" together to get out of the CSM mode. Even easier, just tap the power button to get back to normal operation. It won't turn off if you hit it while in the CSM settings.
Presuming you did this correctly you'll see "CHannel 3" and "GROUP A" displayed. If you see different channels or groups then press MODE to get one or the other to flash and then the + or - buttons to set them back to 3 and A. No, I have no idea why these are the settings you have to use instead of 1 and A; 3 and A are what you need to talk to the D70's built in flash. If you get smart and choose others then it won't work. The other channels and groups are for people much smarter than I who want to try to rig up a zillion flashes to work together and control them all separately and remotely. I prefer professional studio strobes if I'm using more than one strobe at a time.
The SB-600 doesn't go into standby in this mode, so you can run down your batteries if you forget and leave it this way. It just sits there blinking its little red LEDs visible from the front.
HOW TO SHOOT
Easy, just shoot! If you set everything to TTL as I suggest then the camera just does everything. You and I are free to concentrate on the more important parts of making a great image.
Everything is controlled from your camera. This is very convenient if you have the strobes someplace remote, like duct taped behind plants.
You can control the remote flash's output simply by varying the flash exposure compensation control on the camera. You can do that without taking your eye away from the finder! You do that by pressing the same button you used to pop up the flash and then moving the front control wheel. You'll see the amount of compensation on both the camera's top LCD as well as through the finder. Brilliant! You can add more or less flash fill without having to walk over to the remote flash.
You can set the mode (TTL, Manual or AA) from the camera.
You can set the manual power level from the camera as well.
Try to have the little black window on the bottom right of the flash (marked with that same wiggly arrow) pointing in the general direction of the camera. Thankfully it's not a big deal; you don't even need a line of sight so long as the flash is anywhere near the camera or subject.
The sensor is sensitive enough to pick up the flash from the camera even if it has to bounce around a corner or off the subject. This makes this current system so much better than the older ones. You can hide flashes anyplace and even if they can't see the camera they usually go off correctly. They beep to let you know what's going on, even if you cant' see them.
The i-TTL system is much better than the old systems because it just works. If you ever used the older systems you'd know that half the time you'd get no flash, or a full-power flash that also wasted the shot. This new system just works, and that's critical for use in the field where the remote flash is rested on a garbage can or held in your left hand while you hold the camera with your right.
I even can have the flash in a different room out of view of the camera and it goes off just fine.
It works fine even 50 feet away. I haven't tried it any further. Honestly I have no need for a flash that far away; I was just seeing if it worked.

Jul 01, 2008 | Nikon D80 Digital Camera with 18-135mm...

2 Answers

Error 99 only when flash pops up


I know what you two are talking about. I ordered a Canon EOS 300d from a site called "Keh" and I had never used one before... so I get it in the mail on time. The camera works fine for a few minutes then I get an "error 99" and can't do jack with the camera. I researched online and even called keh ... I read and heard that it has to do with the lens... so I sen't the camera back and got my money.

Nov 26, 2007 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

Olympus evolt 410


this is when the camera doesn't have enough light for auto focus! to suppress it, disable the option "auto pop-up" in the settings menu of the camera. you then might risk unsharp images but strobing won't happen until you manually pop-up the built in flash.

to get rid of the whole thing, you can buy one of the olympus e-system external flashes like fl-36 or fl-50. these bring a red-light for auto focus assistance.

Sep 24, 2007 | Olympus E-400 - digital camera

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