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Oskar@RetraUWT last won the day on April 25

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About Oskar@RetraUWT

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  1. There is no opaque cover/integrated diffuser on the Retra Flash PRO/Prime or the X models, the front port is completely transparent. An unaltered beam without hotspots and a wide coverage is our goal. When applying a diffuser to an already wide beam the result will not be obvious on a flat subject because the main difference is in the way the shadows are produced:
  2. The graphs are showing unaltered light output from all flashguns which is without diffusers.
  3. Incorrect, the last graph shows all flashguns at their maximum power: https://www.retra-uwt.com/pages/flashgun-light-comparison
  4. The article by reef photo offers somewhat distorted images of the light output and no actual measurements. A few years ago we compared flashguns in a comprehensive lighting test where we photographed and measured each flashgun at 15 different points. The results are presented here: https://www.retra-uwt.com/pages/flashgun-light-comparison
  5. Hi The Original Retra Flash fires via optical fibre only in SL and TTL. My guess is that the onboard camera flash is emitting a TTL signal. Easily check this by going to SL mode or M mode and set 100 power on your Pro X or Original. If the image is black this means camera is emitting multiple flashes/multiple triggers and is a TTL signal. If you are unable to set the camera to emit a single trigger (not fill-in or TTL) the Retra Flash will need to be set to ignore the preflash. The procedure for this is described in the user manual for the Original Retra Flash which is available in our App.
  6. The last 20% can take anywhere from 0,1 to about 2 seconds depending on the battery condition (new or old, full or flat) and configuration (4 or 8 cells). With the Supercharger the efficiency increases, hence more than double flashes per battery pack.
  7. Please note that Pro X and Prime X both recycle with the same speed. The difference is that the Pro X has 50Ws more power and will therefore emit more light at full power and subsequently the total recycle time will be longer. If you use the Pro X at approximately 50% power it will emit about the same light as the Prime X at 100% power and also recycle in about the same time. The benefit of added capacitance of the Pro X is 1. more light when shooting at full power and 2. more flashes in a row when shooting action scenes at lower power. There have been no complaints regarding lamp overheating with any of the Retra Flash models.
  8. That’s correct, from focus distance and farther away is the useful range that produces a uniform light spread. The working distance can produce a dark spot in the center and reduce the light output, especially with masks with smaller diameters.
  9. Hi Lori Ann and everyone who might run into this topic at a later date. The fastest and most efficient way of getting help with your Retra Flash is by sending us an email with a description and including any relevant data: flashgun composition, serial number, firmware version, etc. Because we ultimately solve all issues with our products we are accumulating a database from which we can quickly troubleshoot and diagnose. Contact us and get help at: info@retra-uwt.com From our email response: In general we have not had a firmware or electronic hardware related issue that would result in the Retra Flash not turning on. For the time being we will assume that everything is fine with the internal components. However we have helped in a couple of cases where the flashgun would not turn on due to a battery not reaching the contact at the bottom of the battery compartment. This happens when the batteries get dents on their edges, usually from accidental falls during exchanges, and their diameter increases so much that they will not reach the contact. The two outer most positions are more sensitive to such battery damage. In case your batteries have dents use those on the two positions in the center. There is a distinct noise when the battery is inserted and falls down and hits the contact. When the battery is damaged it will give a muffled noise. This can indicate there will be an issue with the contact although it’s not guaranteed. Usually there is a dent on just one side of the battery, you can rotate it in a way that the dent will be orientated away from the wall of the battery compartment and so it will not interact with it and not get stuck. Please let me know if you still get issues with the power on after reading this. We will find the solution in any case.
  10. Hi Silvana, the pilot light always comes back on after about 0,5-1 second, it’s not connected to recycle time. There is usually a sound “beep” from the flashgun when it recycles and the indicator light changes color.
  11. No, test firing in batt/test mode works just the same after the update. If you are in bluetooth mode (blue light on the indicator) test firing does not work. Exit bluetooth mode by going to any other mode or turn the flashgun off and on.
  12. The issue of uneven lighting on the presented image of a goby fish can be reduced by choosing a smaller diameter mask and moving the LSD a couple cm further back for a softer edge. Flash power will need to be increased in this case. As others have mentioned the eccentric positioning of flash-tubes and pilot lights is not ideal for snooting. We do our best to reduce the effects but they of course remain and need to be considered in order to get the best results.
  13. Update: a mistake in the App resulted in the App not recognizing that there is a firmware update available. This has been resolved now. Please download the new Retra UWT App (v1.9.9) and update your flashguns to the latest firmware, 3.4 for the X models and 4.3 for the PRO&Prime.
  14. In manual mode everything looks normal. There is no ambient light on the images, the light on the 1/400 is less due to longer flash duration. The maximum power flash duration is about 4ms. This is more or less standard on any flashgun with a circular flash tube. With a linear flash tube we can usually get shorter times, about 1-2ms. It seems that with Sony A1 they allow the slightly higher sync speed only by using the later. As Adam explained with a practical example there is plenty of light available from the Retra Flash Pro X to light up large reefs. I am not sure why you are not getting that much light in your image. Please write to us at: info@retra-uwt.com We will go through more testing and find out!
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