20D high speed sync

shortie · 25th of October 2005 (Tue)

Hi Guys "n" Gals

Been searching but cannot find the answer - but I am probably looking in the wrong place

Just ordered a 580 so before I arrives I thought I had better look into how to use it

Is there a way to get high speed sync with a 20D - I know I can up the flash sync to 1/250, but what I am after is to have a shutter speed of say 1/1000 and get a flash to fill some of the shadows

any pointers welcome

Shortie

peterdoomen · 25th of October 2005 (Tue)

Hi Shortie,

There should be a high speed sync button on the flash (at least there is one on my 420EX). The 20D will adapt itself automatically and will allow you to set shutter speeds faster than 1/250.

PeteR.

Snapman · 25th of October 2005 (Tue)

Yes, I can do it with my 550EX, so I'm sure it'll be possible on your 580EX. As somebody else has said, the control will be on your flash and not your camera

With your 20D, you'll be able to sync all the way up to 8000th sec., although the guide number becomes lower as the shutter speed increases.

shortie · 25th of October 2005 (Tue)

thanks all

that would make sense as I could not find any thing in the 20D manual

off to find a 580ex manual to down load

does this also mean I can use the flash in continous mode but just a lower guide number

thanks again

Shortie

Jon · 25th of October 2005 (Tue)

If by "use the flash in continuous mode but just a lower guide number" you mean use it manually with lower output, HSS and manual don't work the same way. You will be able to select power levels on the 580 for manual flash use; you won't be able to set the 580 for E-TTL II at a lower output. The manual includes constraints on continuous flash use at different power level settings.

Snapman · 25th of October 2005 (Tue)

BTW Shortie, There was a thread a couple of weeks' ago regarding HSS which taught me something and might interest you. That is, you can leave HSS switched on all the time because it automatically switches off when you use a shutter speed - in the case of a 20D - of 250th or lower.

shortie · 26th of October 2005 (Wed)

thanks guys

Nice option Snapman the 580 arrived today so will have a play tonight

Shortie

25th of October 2005 (Tue)	#1
shortie Member Join Date: May 2004 Location: UK Posts: 410 IMAGE EDITING OK	20D high speed sync Hi Guys "n" Gals Been searching but cannot find the answer - but I am probably looking in the wrong place Just ordered a 580 so before I arrives I thought I had better look into how to use it Is there a way to get high speed sync with a 20D - I know I can up the flash sync to 1/250, but what I am after is to have a shutter speed of say 1/1000 and get a flash to fill some of the shadows any pointers welcome Shortie

25th of October 2005 (Tue)	#2
peterdoomen Senior Member Join Date: Aug 2005 Location: Lier, Flanders (northern, flemish speaking part of Belgium) Posts: 1,123 IMAGE EDITING OK	Re: 20D high speed sync Hi Shortie, There should be a high speed sync button on the flash (at least there is one on my 420EX). The 20D will adapt itself automatically and will allow you to set shutter speeds faster than 1/250. PeteR. __________________ Canon EOS 20D \| Canon 70-200 f2.8L IS + Hoya UV Filter \| Canon Extender 1.4x \| Canon 50 f/1.8 \| Canon 85 f/1.2L mk II \| Tamron 17-35 f/2.8-f/4\| Tamron 28-75 f/2.8 \| Tokina 100 f/2.8 macro \| Kenko extension tubes \| Canon Speedlite 420 EX & Sto-fen Omnibounce\| 80GB Flashtrax \| Manfrotto Tripod 190 pro B & Joystick 322RC2 \| Lowepro Micro Trekker 200 PDFs: Make money with ShutterStock - Make your own Tabletop Studio - Glass Buying Guide My ShutterStock Gallery

25th of October 2005 (Tue)	#3
Snapman Senior Member Join Date: Aug 2005 Posts: 1,126 IMAGE EDITING OK	Re: 20D high speed sync Yes, I can do it with my 550EX, so I'm sure it'll be possible on your 580EX. As somebody else has said, the control will be on your flash and not your camera With your 20D, you'll be able to sync all the way up to 8000th sec., although the guide number becomes lower as the shutter speed increases. Last edited by Snapman : 25th of October 2005 (Tue) at 09:08.

25th of October 2005 (Tue)	#4
shortie Member Join Date: May 2004 Location: UK Posts: 410 IMAGE EDITING OK	Re: 20D high speed sync thanks all that would make sense as I could not find any thing in the 20D manual off to find a 580ex manual to down load does this also mean I can use the flash in continous mode but just a lower guide number thanks again Shortie Last edited by shortie : 25th of October 2005 (Tue) at 09:14.

25th of October 2005 (Tue)	#5
Jon Moderator Cocker Spaniel Mod Join Date: Jun 2004 Location: Kensington, MD USA Posts: 65,151	Re: 20D high speed sync If by "use the flash in continuous mode but just a lower guide number" you mean use it manually with lower output, HSS and manual don't work the same way. You will be able to select power levels on the 580 for manual flash use; you won't be able to set the 580 for E-TTL II at a lower output. The manual includes constraints on continuous flash use at different power level settings. __________________ Jon ---------- EOS, Powershot and Domke - it doesn't get any better than this! T90 and stuff \| F-1n, New F-1, FTb and more stuff out on loan Cocker Spaniels Maryland and Virginia activities *DC Cherry Blossoms* Image Posting Rules and Image Posting FAQ Report SPAM, Don't Answer It! (link) PERSONAL MESSAGING REGARDING SELLING OR BUYING ITEMS WITH MEMBERS WHO HAVE NO POSTS IN FORUMS AND/OR WHO YOU DO NOT KNOW FROM FORUMS IS HEREBY DECLARED STRICTLY STUPID AND YOU WILL GET BURNED.

25th of October 2005 (Tue)	#6
Snapman Senior Member Join Date: Aug 2005 Posts: 1,126 IMAGE EDITING OK	Re: 20D high speed sync BTW Shortie, There was a thread a couple of weeks' ago regarding HSS which taught me something and might interest you. That is, you can leave HSS switched on all the time because it automatically switches off when you use a shutter speed - in the case of a 20D - of 250th or lower.

26th of October 2005 (Wed)	#7
shortie Member Join Date: May 2004 Location: UK Posts: 410 IMAGE EDITING OK	Re: 20D high speed sync thanks guys Nice option Snapman the 580 arrived today so will have a play tonight Shortie

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