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02-05-2011, 05:39 AM   #1
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K5 and Canon 580 EX

I thought I saw a thread that discussed whether you could use a Canon flash on a Pentax K5 but can't seem to find it.
My question is can I use my Canon 580ex on my K5 safely. I know I will have
to use it in manual mode if it is safe
thanks for your response

Jim Olson

02-05-2011, 09:27 AM   #2
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According to the specs, the trigger voltage is below 6V :
DPanswers: Flash: Canon 580EX

You can safely use it on your K5, although only manually.
02-05-2011, 11:32 AM   #3
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Original Poster
thanks, I was hoping that was the case

Jim
02-05-2011, 02:44 PM   #4
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I have 3 Canon and 3 Pentax bodies. I use all my flashes on all my bodies. It is no problem at all.

02-05-2011, 06:50 PM   #5
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QuoteOriginally posted by cwood Quote
I have 3 Canon and 3 Pentax bodies. I use all my flashes on all my bodies. It is no problem at all.
But is the Canon flash fully functional on a Pentax body? Exactly what are the limitations and work arounds, if any?
02-05-2011, 08:07 PM   #6
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There is no TTL metering... which is software and brand specific. The flash is 100% functional - but only as a manual flash. The flash will still sync to your camera at 1/180. To shoot the flash remotely you will need radio transmitters since the pentax wireless triggering is a visual "strobe" trigger that needs to be received by a P-TTL supported flash.

I use a 580exII and 430exII hotshoe mounted the k-7 and k20D. I also fire them remotely from those cameras using Pocket Wizard Plus 2's and Flex TT5's.
02-05-2011, 09:32 PM   #7
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Is the Cannon the better choice?

This thread is very timely. as I will be shooting an ice skating party at night and have a Pentax 540 and access to a Cannon 580 with a large external battery pack and have been wondering which to use. I understand that the Pentax will work automatically, but have not always found it to be all that accurate. Regarding the Cannon, the external battery pack is an advantage because of the faster recycling time, but what are the other pros and cons between the two?

Last edited by GarySloman; 02-05-2011 at 09:35 PM. Reason: Wasn't finished when I hit enter
02-06-2011, 12:34 AM   #8
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Itse en käyttäisi mitään canon tuotteita iPentax.

02-06-2011, 01:26 AM   #9
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580EXII with ext pack will be recycled in 3s. You can use M or A flash although A flash is 2EV under by default (don't ask me why), and can vary slightly in different environments and not as consistent as Metz.
02-06-2011, 08:13 AM   #10
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I have the cp-e3 power pack for the 580exII and I would estimate the recycle time at full power to be closer to 1 second for approximately 5 shots before it slows down slightly. IMHO the 580exII is the best flash ever made by any manufacturer. It is weather sealed, it has an amazing lock down mechanism on the shoe, the thermal control does an excellent job of preventing burnout, and the recycle times are the fastest I have ever experienced (even without the battery pack). This is why I use it on my pentax cameras all the time.
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