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About Oskar@RetraUWT

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  1. We got a lot of questions about the beam angle of the Retra Flash Prime/PRO with the new Reflector. Because every manufacturer measures the beam angle in a different way we made a quick experiment. All flashguns are positioned at 50cm (20 inches) from a white wall and shot at normal exposure in the center of the beam. The yellow circle is marked at approximately 90ยบ angle of coverage.
  2. Hi We have just released a firmware update (2.5) for the Retra Flash PRO/Prime which includes improvements of Smart SL, HSS, BATT/TEST and U2 modes including an updated user manual. The update is done easily with our App, available for iOS and Android devices. Just download the app and follow the instruction for connecting your flashgun to your device. For Apple devices: https://apps.apple.com/app/id1472741374 For Android devices: https://play.google.com/store/apps/details?id=gm5.solutions.retra_flash&hl=en If you need help with the install please write to: develop@retra-uwt.com
  3. I just want to add that complete technical specifications are available on our website at the bottom of this page: https://www.retra-uwt.com/pages/retra-flash Here you will also find information about the battery life at half power, dimensions, weight, etc.
  4. Thank you for letting us know, there is in fact an error. This information was not updated in the public user manual. We will amend it shortly. Meanwhile please find attached a screenshot of the information.
  5. Hi, thank you for the feedback. We update the user manual as we get more feedback from photographers reading it or as we add new features. The weight of the flashguns (in water) is already indicated in the "basic information" section of the user manual. We will consider adding more practical tech-spec in there for easier access. Currently the long tech-spec are listed on our website. U1 and U2 can be set independently of one another and all advanced features can be set to each position individually. There is currently a bug in the firmware that resets the U2 position when the flashgun is turned off - it defaults U2 position to "Smart SL" mode. U1 position works normally and saves the setting that was assigned in the app. We will release a firmware update to amend this bug and improve on other things in the coming weeks. I know that TRT have support for HSS and that it works with our flashguns but I don't know the details and which cameras are compatible. Better ask TRT directly about compatibility.
  6. It means the camera is emitting a TTL signal with pre-flashes instead of a single flash pulse - thats' why it works in Smart SL mode. In Smart SL mode the Retra Flash will automatically detect the pre-flashes and ignore them, so the photographers will be able to adjust with manual power settings. The reason that it does not work above 37,5% power in ON mode is because the camera is emitting two flashes for a single exposure. After you get above a certain power level it will not be able to give any more power for two consecutive flashes. It's a very clear symptom that you should switch to Smart SL or change the camera settings if they allow setting for manual exposure. The complete user manual for our flashguns is available from our App called "Retra UWT", ready to download for free on Google Play and the App store. In the app you will find the google translate option to read the user manual in your native language. From the app you will also be able to access advanced user settings and other important information regarding your flashguns as well as making mandatory firmware updates when they become available. Please note that the user manuals and advanced user setting of the flashgun are always available inside our app without any internet connection. Even if you are somewhere far away on a boat you can still get all the information without having to access the internet. The connection with the flashgun is made via bluetooth which also does not require any internet connection.
  7. Hi, where have you read this? -- In 2021 it will be 10 years since the Retra UWT company was founded and throughout this time we have always serviced and repaired all of our products regardless of age. If you have our product and write us an email to have it repaired or serviced we always do it, promptly, without exception. There were some indications about potential reliability issues in this thread and from knowing exactly how our flashguns perform in the field and the defects, I can say that any doubts regarding the reliability of the new Retra Flash Prime/PRO are largely unfounded. The new flashguns are a continuation of the Original model and naturally we have taken all the experience into improving the new models and advancing the technology. I think that we are currently producing some of the most reliable flashguns on the market.
  8. As Chris mentioned the design of the flashtube plays a major role in how light is distributed and the power output. How the flashguns perform in wide angle situations can be seen here: https://www.retra-uwt.com/pages/flashgun-light-comparison In macro situations the differences in light beam spread are same but come out less visible (especially on subjects that are very 3D) because the light beam is compressed onto a small area. If we measure the light beam of the Z-240 coming out of the LSD Ultimate snoot, the uniformity of the beam is considerably less than with the Retra Flash PRO. Although in macro photography this is less of an issue. When comparing both these flashguns for snooting with the LSD Ultimate or a homemade DIY snoot the biggest difference worth noting is the placement of the pilot light. Having a central pilot light being a much better experience when positioning the light.
  9. Roughly speaking somewhere around 6-25% power should be used for those settings depending on the mask you are using, actual distance from the subject, subject color, etc. The LSD Ultimate snoot has a focus distance of about 175mm in water. Moving the snoot farther will give a softer edge with even light distribution but when the snoot is positioned too close it will reduce the light output and a dark spot will form in the center. See image below. The square mask is great for finding the focus distance because the corners can be clearly seen as sharp when the LSD is in focus. Please note that smaller apertures on the mask also reduce the light output. The LSD Ultimate snoot for the Original Retra Flash has the same style bayonet mount and it can be mounted to the new Retra Flash PRO/Prime but optically it is not compatible and makes the effect above even worse. The difference is in the length and the diffuser: the Mounting module for the new Retra Flash is about 43mm long, for the Original Retra Flash it was about 33mm.
  10. After the ready light the flashgun is fired at 100%.
  11. To showcase the capability of the Supercharger we have filmed the recycle time at 100% power. Inserted are used eneloop pro batteries which already had 50+ charge/discharge cycles and were not new by any standard. The firmware on the flashgun is still the alpha version.
  12. We are currently running an alpha firmware version on the flashguns (made only for initial internal tests) which is very conservative. It produces fast recycle times only with really new batteries. Adam was using old but maintained batteries and the result was already not as fast as it could have been. In the next few days we will be able to send an update to Adam and perhaps he can make another video comparison then.
  13. Adam Hanlon has the first (and currently the only) prototype unit of the Supercharger in his hands for testing. There will be content coming up on Wetpixel's website shortly.
  14. Just added "wet weight" information into the tech-spec's here: https://www.retra-uwt.com/pages/retra-flash
  15. That's about right, we need at least the energy in Ws or J to determine the speed of recycling. As correctly assumed the PRO's have much more energy in their capacitors compared to Z-240. Also please note that recycle time specs are not consistent, especially with Inon, as was pointed out in this thread here: https://wetpixel.com/forums/index.php?/topic/63538-inon-z-330-ready-light-comes-on-early/ We are on the way to introduce a "Supercharger" for the Retra Flash Prime/PRO that will be an additional battery pack. With it the recycle time for the PRO be halved and the total number of flashes will double. More details will be revealed in the coming weeks when the product is ready for announcement.
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