Strobe HSS.


Snoops27

Link Posted 06/12/2014 - 13:04
Does anyone know if it is possible, given Pentaxs' limit on off camera sync speed, to trigger a studio high speed strobe the with K5-11s?
e.g. would it be possible to use this YongNuo, http://ebay.eu/1ypWEJQ, on camera to fire an HSS Strobe using strobe in slave mode? or would you have to use a Pentax flash such as the AF540FGZ or the 360.
Does anyone know if there are any wireless triggers which overcome this problem?
Any help would be much appreciated...
Follow me, I'm right behind you...

Fletcher8

Link Posted 06/12/2014 - 13:41
Hi Alan

In answer to your above question its yes and no. let me try and explain how you could solve the problem in relation to the Sync speed issue of 1/180th.

The only HSS Pentax compatible wireless trigger I am aware of is the Aokatec, you can read all about it link below

http://betterfamilyphotos.blogspot.co.uk/2012/09/cheap-wireless-ttl-aokatec-ak-t...

Cactus make a flash, the Cactus RF60 that can mimic HSS off camera, but you will need a Pentax or Metz flash operating as master in HSS to trigger the Cactus RF60 Flash, but each RF60 you have will mimic HSS giving you some great creative freedom and additional flash power/ direction.

You could also use a TTL cable that would provide P-TTL HSS if your flash is P-TTL compatible?

Hope the above is some use.

Cactus products link http://www.cactus-image.com

Regards

Fletcher8
Fletcher8.
Last Edited by Fletcher8 on 06/12/2014 - 13:44

Helpful

Blythman

Link Posted 06/12/2014 - 16:05
Another option with some studio strobes is hypersync. I've never tried it so can't say how well it works with Pentax. In essence you set the flash off before the shutter releases. The shutter is then open for the tail end of the flash. It won't work with all studio flashes. If it does they'll probably need to be set to full power to lengthen the flash time. You'll also need triggers which will trigger the flash just before the shutter

Some reading ..... http://news.broncolor.com/tutorials/hypersync-easily-explained-by-fabio-gloor-pa...
Alan


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Helpful

Snoops27

Link Posted 06/12/2014 - 18:25
Thanks guys, all contributions gratefully received. lol, but seriously, the more info I get on this matter, the better I am able to understand the whole flash enigma. I'm sure I'll get it all sorted in the end. Ta very muchly....
Follow me, I'm right behind you...

McGregNi

Link Posted 06/12/2014 - 20:43
Fletcher, thanks for that tip-off about the Cactus RF60. I have been exploring options for off-camera HSS in conjunction with my Pentax AF-540 FGZ ... I had thought I might need another Pentax compatible P-TTL flash, but a new Cactus would be great!

If you don't mind, could I just run through a few assumptions, for me and the wider audience, just to check a few things ....

So, am I right to assume ...

.... that the Cactus will not fire in response to the pop-up flash

.... that the Cactus can be set to one of the 4 Pentax channels as Slave , and will then fire in sync with the AF -540 FGZ on the camera set to the same channel

.... that the AF-540 FGZ, set to HSS mode, will trigger the Cactus RF 60 off camera also set to HSS mode, up to speeds of 1/8000thsec

.....That balancing of the lighting would be achieved by manual mode adjustments on both flashes

..... That you have to set the Cactus settings directly on the Cactus flash unit in this particularly pairing

I make no assumption for this next question, as I just don't have an idea myself .... is it possible with this pairing of flashguns (cactus off camera / Pentax AF-540 FGZ on camera) to set the Pentax to NOT contribute to the lighting, ie so that it just sends the trigger pulse ... and for this should you turn the flash head away from the scene?

Sorry to ask so much! I just thought it would all be helpful, and if it will all work as I'm hoping then the Cactus looks like my ready made solution!
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
Last Edited by McGregNi on 06/12/2014 - 20:43

Fletcher8

Link Posted 07/12/2014 - 22:06
Hi Nigel

Sorry for the late reply, I have only just read your above post.

Wow! lots of questions, so here go's

Q. that the Cactus will not fire in response to the pop-up flash? I have not tried this but will let you know.

Q. that the Cactus can be set to one of the 4 Pentax channels as Slave , and will then fire in sync with the AF -540 FGZ on the camera set to the same channel See below question and answer.

Q. .... that the AF-540 FGZ, set to HSS mode, will trigger the Cactus RF 60 off camera also set to HSS mode, up to speeds of 1/8000thsec? The Cactus RF60 mimics the HSS of the Pentax / Metz which is being used in HSS mode, you can set flash duration and pulses on the Cactus.

Your other questions are a mixture of yes and no, as some of the questions you ask I have not tried personally, but I don't see why a lot of what you ask could not be achieved. I think the best thing would be to download the RF60 Manual which is very good and will answer a lot of the things you are asking, well I think it will.

Download Cactus RF60 PDF here

http://www.cactus-image.com/RF60%20manual.pdf

Hope this helps. The RF60 flashes are very good, I don't think you would be dissapointed if you purchased one.

Regards Fletcher8
Fletcher8.

kitaoka

Link Posted 18/08/2017 - 21:38
I have written a blog post about how I've achieved HSS with my 645Z.

McGregNi

Link Posted 21/08/2017 - 20:45
I fully agree with your points in your blog .... the Priolite 'hot-sync', despite being the only 'hyper-sync' option with power control (as far as I know), is clearly a specialised solution! You're right, being able to use your more convenient and flexible Godox lights also for HSS with the addition of a single V6II unit is a very economical option.

The trigger stacking and compatibility confusions will continue to thwart the efforts of many though, and keep forum threads full of ongoing requests for help on how to get things all working .... however your blog helps to give confidence and good evidence of the reliable results.

Thanks for the update, and good luck with your future HSS images!
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
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