Canon T90

MattKing

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dances_w_clouds said:
Where would I find the serial # on my Metz 45 CT-1 ? I've looked all around it & nothing with #s
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Dennis:

On my 60 CT2 the serial number is engraved on the bottom of the flash-head itself - I just rotate the bounce head up to point vertically, and it is visible near the front.

If your flash has a built in wide angle diffuser, slide it into place, because the 60 CT series' diffuser hides the serial number when it is stored retracted.
 
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Dennis S

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From what I can read it is a 23 ??? but it still puts it UNDER the 53400 mark of the high voltage. I have collected all the post links that were sent to me but I can only find one reference that stated the 45 CT-1 Will not work on the EOS cameras but nothing about the T-90. I have been using the flash many times with out a problem on my A & F body Canons. I need a SOME sort of specific "evidence" so I don't go into Beau Photo not knowing what I am referring to.
 

MattKing

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Dennis:

If the serial number is less than 53400, it means that your flash is the older version, and has a trigger voltage that ranges between 200V and 600V - much too high to safely use with cameras that have flash synch circuits that rely on electronic switching components rather than mechanical switching components.

Your F series camera(s) are fully mechanical.

I don't know whether the flash synch circuits in your A series cameras are fully mechanical.

I think that the flash synch circuit in the T90 is the same as the early EOS cameras, and is therefore electronic, and is therefore subject to being damaged by electronic flashes with high trigger voltages.

You may find the section on trigger circuit voltage in the following link useful (note that there is some discussion therein about the T90, although not in reference to trigger circuit voltages per se): http://photonotes.org/articles/eos-flash/index2.html

By the way, I definitely wouldn't use that flash with your Mamiya 645 Super, unless you use a safe-synch as well.
 
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Dennis S

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OK thanks everyone for your help. The adapter will remain unused until I get it straightened out. Too bad Beau Photo doesn't remain open on weekends. I always thought remaining closed on weekends (Saturday anyway) to be a bad idea. But I suppose the majority of customers are the professionals who need weekends for them selves.
Also we are getting an abundance of sun so a flash will not be necessary hopefully. And its a long weekend as well. In Canada anyway.

And I thought this T90 would be the best thing I ever purchased but as you can see by all my posts it is NOT working as well as I was expecting.
 
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AgX

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dances_w_clouds said:
From what I can read it is a 23 ??? but it still puts it UNDER the 53400 mark of the high voltage. [] I need a SOME sort of specific "evidence",...
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Wouldn't just employing a voltmeter yield the best evidence?
 

benjiboy

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The T 90 was almost the prototype of the EOS range, and since the actual Canon dedicated flash for the camera the Canon 300TL has a trigger voltage of about six volts ( and can be bought on ebay for about the same price as the Wein Safe Sync and gives you full TTL OTF flash and automatic fill in flash) I wouldn't risk it for the sake of £50.
 
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Dennis S

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Well a round of thanks to APUG members. Especially "benjboy" and "Mattking" Turned out my Metz 45CT-1 cranked out 250 volts and I only needed 7 volts. The adapter was returned to Beau Photo with out any problems. I will still be getting the Wein adapter or the Canon 300TL but probably the adapter that I can use on my Mamiya 645 Super it all depends on how my shopping and comparing goes until my next G.A.S. episode.
 

benjiboy

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I finished up buying both , the 300TL in mint condition was cheaper than the Wein Safe Sync, the 300TL with TTL OTF flash is magic with fill in flash ( syncro-sunlight) for outdoor portraits, and does the calculation for you and it's fairly powerful with a Guide Number of 35 Meters for I.S.O 100 film.
 
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Dennis S

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T90 flash

I will be keeping my eyes open for a 300 TL to be available locally but the Safe-sync is available when I come up with the $$$. I am just cautious at buying one on the auction site as a 1986 flash could have been through some questionable situations that would limit its endurance.
 

MattKing

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Dennis:

Just in case it isn't clear, the Safe-sync doesn't do anything to protect the flash. It protects your cameras from the flash.

The relatively high trigger voltage provided by your flash is what renders cameras vulnerable.
 

benjiboy

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dances_w_clouds said:
With the safe-sync I can use the flash on my Mamiya 645. I guess the Canon 300 TL could be used on it also.
Click to expand...

I believe the metz 45 would be far more suitable for your 645 the 300TLs electronics were designed specifically to couple with the T90, and as
 

benjiboy

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dances_w_clouds said:
With the safe-sync I can use the flash on my Mamiya 645. I guess the Canon 300 TL could be used on it also.
Click to expand...

I believe the metz 45 would be far more suitable for your 645 the 300TLs electronics were designed specifically to couple with the T90s circuitry, and as Matt King writes in his previous post the Safe Sync reduces the voltage of any strobe to below 6Volts to protect the cameras electronics not the speed light ,that's why the Nikon one you had and returned was no use.
 

benjiboy

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dances_w_clouds said:
With the safe-sync I can use the flash on my Mamiya 645. I guess the Canon 300 TL could be used on it also.
Click to expand...

I believe the metz 45 would be far more suitable for your 645 the 300TLs electronics were designed specifically to couple with the T90, and has six contacts on the foot to fully connect the functions, Matt King writes correctly in his previous post and I agree the Safe Sync reduces the voltage of any strobe to below 6Volts to protect the cameras electronics not the speed light that's why the Nikon one you had and returned was no use.
 
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