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Member Since 19 Jan 2012
Offline Last Active May 07 2016 05:10 PM

Posts I've Made

In Topic: Sony RX100 IV and YS-D2 Strobes (newbie)

02 May 2016 - 11:28 AM

Are you plugging the fo cable into the right part of the strobe? A pic of your setup would be helpful....


I don't have a DS2, my strobe is an old YS90DX and I'm using an RX100 II. Your fiber optical cable should go under your strobe in the slot that has a sensor cover (not the first one). As for setting the flash in manual on your camera to test your strobe don't loose time searching for it, there's no way to do that with your camera it's always TTL. You should set the camera flash into any of the mandatory mode (fill,front or rear). Be sure your driving mode is not on Bracket :Continous (BRK:C)


In Topic: Sony RX100 IV and YS-D2 Strobes (newbie)

01 May 2016 - 04:42 PM

I hope someone will come up with something more enligthning, but have you try setting your strobes on DS-ttl and the RX100 flash on front. That would be what I would try first (assuming the you fiber-opticaly trigger your strobe). Set your RX100 first in T mode with a speed of 1/125thand ISO at it's lowest. If  your strobes are firing you can switch mode and try other settings.


Good luck!

In Topic: TTL with Sony RX100-II+S&S 110a?

01 May 2016 - 04:04 PM

The circuitry of DS-TTL and RX100 leaf shutter allow indeed very fast synch but the YS60 requires at least 1/500th of a second (2ms) to dump it's full charge (according to Digital dapter II manual) I've seen a graphic of a full dump of a YS90DX and it is as long as 4000us (1/250th). I don't know about the YS110alpha it may be a bit better. So there could be a problem if the RX100II evaluates that it should fire it's internal strobe for such a long time and the shutter speed is really fast (1/250th or faster). If a fraction of the charge is required it could be OK and the system could synch well over 1/250th.


I don't know if the YS110alpha use a recorded-TTL or a normal-TTL approach. The Digital Adapter 2 now use a recorded-TTL approach by default to reduced positive feedback (It can be programmed to normal-TTL if needed). With recorded-TTL the inner flash fire first then once it is off the external strobe fire for the same amount of time, this reduce the possibilty of positive feedback but reduce the maximum synch speed by a factor two.


I should be able to water test my setup next week and check if this is really a concern or not. 

In Topic: Post processing for silt and noise

29 April 2016 - 02:47 PM



Doug Sloss in his "Underwater Photoworkshop" DVD presented a nice Photoshop technique to remove a lot of backscatter from an image if you can afford to loose detail in the background. I don't know if it is still on his "Adobe Photoshop CS4 for the Underwater Photographer" DVD http://www.underwaterphotoshop.com/. Erin Quigley present a very similar (if not the same) technique at http://www.scubadivi...derwater-photos

In Topic: TTL with Sony RX100-II+S&S 110a?

29 April 2016 - 02:17 PM



Is your shutter speed higher than 1/250th?  That may be a reason for the TTL not to work if a full dump is required. Check if your TTL lamp on the YS100alpha turns on green, if not there is a full dump. The RX100II can flash synch at very high speed. I use an RX100II and a YS-90DX with Mathias Heinrich Digital Adapter 2 and I still struggle understanding how's everything is working with TTL-flash. I was used to shoot with manual flash in M mode. One last thing flash compensation on the RX100II can be used to reduce the intensity of the strobe. You may consider playing with that before cranking up your ISO or using larger apertures to reduce the intensity of the flash if you want to use higher shutter speed.