05. The relationship of shutter speeds and apertures to flash Many photographers are confused by the relationship of flash power and aperture settings or shutter speeds. In this chapter Karl demonstrates exactly what this means and shows you the results. Comments June 27, 2017 Log in to Reply Anthony Scott I was under the impression that my strobes pulse repeatedly in high speed sync mode to expose the image. Is that incorrect or do Broncolor lights employ a different system to handle it? Thanks! June 27, 2017 Log in to Reply Karl Taylor Hi Anthony, some strobes do use a repeating pulse but others now use just one extremely long pulse that lasts for the whole duration of the ‘slit’ passing across the sensor. June 27, 2017 Log in to Reply Anthony Scott Okay, so there’s new more efficient technology. With my strobes there is a reduction of max power when you’re in high sync mode due to the pulsing. Is there a max power output reduction with the Broncolor series due to the extended flash time? Thanks. June 27, 2017 Log in to Reply Karl Taylor Actually I think the flash power is increased to extend the time. July 22, 2017 Log in to Reply MizUniverse always been an area to stay away from BCuz its never been explained as well as you just did fir me Karl. THANK YOU My husband is getting jealous Bcuz I spend all my spare time watching you right now hahahaha! “Sorry, I am busy with Karl right now” giggle July 22, 2017 Log in to Reply Karl Taylor Ha ha brilliant, apologise to your husband from me 🙂 August 26, 2017 Log in to Reply Jacob Slaffey Your courses are a Godsend, i can’t believe how informative they are. Thanks August 26, 2017 Log in to Reply Karl Taylor Thanks Jacob! September 7, 2017 Log in to Reply Frank Garvan nice one again, always great to watch and pick a lot of tips thanks FRANK GARVAN September 14, 2017 Log in to Reply Jaspreet Singh very nice explanation , but i am confusing with my canon 5 d mark iv when i work with this first curtain sync its work but when shoot with second curtain sync my camera body not select the second curtain i want to know why its happen because of my canon flash i use older version canon 600ex rt and wireless trigger st ex3rt but when i put flash on my camera the second curtain sync option works, why its not work with wireless trigger September 14, 2017 Log in to Reply Karl Taylor Hi Jaspreet, I’m afraid these sort of technical issues with various camera brands and flash combinations is not something we can help with, you will need to speak to Canon support for something like this. October 26, 2017 Log in to Reply James DeBruyne Aaaand there goes my lack of understanding! Love your teaching style. Amazing! October 27, 2017 Log in to Reply Karl Taylor Thank you James. October 28, 2017 Log in to Reply maria eugenia fitzmaurice cahluni Karl, will be spanish subtitles? ¡Thanks! October 31, 2017 Log in to Reply Tom R Mehlum Section 1: Sync speed Best explanation I’ve ever seen on the subject. Simply brilliant and easy to understand. Section 4: Not only are you explaining 1st and 2nd curtain synchronization, you shows it in the camera too. Very handy as I use the same camera. I’ve surprisingly noticed (as I wanted to follow your steps) that 2nd curtain sync was not available (in the 5D mIII camera nor the speedlite) using Canon Speedlite Transmitter ST-E3-RT and Canon Speedlite 600EX-RT. But when mounting the speedlite directly on the body it was available both places. Does it mean that it’s depending on what kind of transmitter/trigger you have if you want to use 2nd curtain sync? November 2, 2017 Log in to Reply Karl Taylor Hi Tom, yes the ability to perform certain tasks on dedicated flashes may be compromised when used off camera with triggers. November 16, 2017 Log in to Reply Giovanni Risi At minute 22:05 you explain 3 ways to control flash exposure: aperture, flash power, flash-subject distance; actually there’s a 4th way, which is ISO! Agree? November 16, 2017 Log in to Reply Karl Taylor Hi Giovanni, technically speaking yes but it is not a choice I would opt for as it would require a reduction in quality. For example as you increase ISO then the image quality deteriorates so it is better to work with the others, there is also another option and that is to add filtration over the lens or lights to reduce exposure where necessary but the process of effective teaching is to feed the right information at the right time 🙂 January 21, 2018 Log in to Reply Peter Little Hi Karl Is this a problem with mirrorless cameras? Regards Peter January 30, 2018 Log in to Reply Karl Taylor Hi Peter, can you expand on that a little please. Is what a problem? January 24, 2018 Log in to Reply Gina Heaton HHHHOOOOO….OMGOSH!!! I totally get that about flash sync and why it’s important. Plus I never knew that the shutter changed the way it operates with a request for a fast shutter speed! No one has ever explained that to me! You just changed my whole world of understanding of my camera. I only thought I knew every mechanical thing about it! I totally get that. That changes so much. January 29, 2018 Log in to Reply Karl Taylor Thank you Gina. January 27, 2018 Log in to Reply Derrious Robinson Hi Karl, When it comes to rear sync flash, do you set your camera to expose for the ambient light with the long exposure first before you bring in your flash/strobe? So that you can have the subject properly lit while moving and then the flash comes in to stop motion and make the subject in focus? I just want to know how to properly set my camera settings when using this technique. Thank you, January 29, 2018 Log in to Reply Karl Taylor Hi Derrious, I usually underexpose my ambient exposure by about one stop and then add enough flash on my subject. You’ll see me apply this technique many times in the “Fashion” section where I’m shooting on location. February 26, 2018 Log in to Reply Paul Kreuter Can you adjust remotely (on the broncolor transmitter) the power of your flashes? Or every time you have to adjust the flash power do you have to physically walk over to adjust or have an assistant? February 28, 2018 Log in to Reply Karl Taylor Hi Paul, you can adjust from the transmitter, an app, or now even from Hasselblad’s Phocus software. March 17, 2018 Log in to Reply Dr Rao PVN hi sir what is the correct advantage of first curtain synchronisation. I mean when it can be used appropriately March 17, 2018 Log in to Reply Karl Taylor Hi Rao, there is no advantage or disadvantage if the shutter speed is high or the subject is not moving. Second curtain is only an advantage on a moving subject but it’s not a disadvantage on one that is not. The exception may be that you get better or higher speed sync with first curtain sync. March 30, 2018 Log in to Reply Nik Andrews Hi Karl, I think you may have answered this above, is there an example of where First curtain sync is better than rear or second? It seems that cameras default to first so I think there must be a reason for this. Many thanks Nik March 30, 2018 Log in to Reply Karl Taylor Hi Nik, yes the answer above mostly covers it but in addition TTL metering (which I don’t use) doesn’t work with second curtain sync. Comments You must be logged in to leave a comment.