fotowbert

fotowbert

Lives in United States MI, United States
Works as a Mechanical engineer (retired)
Joined on Jan 10, 2011
About me:

"...<If you don't sweat the details>...the magic doesn't work." Brooks, F. P., The Mythical Man-Month, pg 8.

fotowbert's recent activity

  • When adapting full frame lenses you do get about a 1 stop advantage when using a focal reducer adapter. The 1 stop increase in light is due to the focal reducer concentrating the light into a ...
  • The 560-TX doesn't need to be "at the end of the chain".  A YN RF-603II will also fire your YN 560 IV units (I use 560 IIIs) if set to the same RF channel and the flashes will still fire as ...
  • I use the YN560-TX and haven't seen any device specifically marketed to relay the YN560-TX power/zoom signals further then the TX transmits. No doubt some electronics wizard could probably create one.
  • Looking at the OP's 2nd image the larger ones appear to be more like hexadecagons (16 sided polygon) if it were not cropped by the image boundary. These shapes approximate circles quite well IMO. (1) John
  • My guess too. Looks like circular artifacts from lens vignetting correction. Here are a couple examples: https://www.dpreview.com/forums/post/56605392 https://diglloyd.com/blog/2014/20140223_1-Rico ...
  • The built-in RF receiver on the YN 685 (flashhavoc.com link) must be set to that of the transmitter used on camera. YN's 622 wireless protocol supports both TTL auto flash exposure and manual flash ...
  • Your YN RF-602 triggers are unable to provide the communication signals on the 4 proprietary Canon hot-shoe channels the 580EX probably needs to function as a "Master". The RF-602 are manual only ...
  • I would expect your idea to be safe based upon the fact my YN RF-603 II (Nikon version) triggers have no hard-wired connection between the center pins in their upper hot-shoe and foot. The trigger ...
  • Using a normal size nut and flat washer would work but means you must carry a wrench because the nut is too small to tighten sufficiently by hand. Here are a couple suggestions allowing use of the ...
  • It shouldn't be too long before off-camera drone flash is available similar to this drone selfie camera .  It will automatically hover above your subject(s) at your specified position for the ...
  • I was quite surprised at the results when I rubber banded a small laser pointer to my tripod mounted camera's lens and pointed it at a distant wall. The spot would easily dance for a number of ...
  • I wasn't aware the Nikon version of the YN568EX II was available.  The following answer assumes you have the Nikon version and not the Canon compatible model. The YN568EX doesn't have a built-in RF ...
  • This test is an easy way to evaluate the primary factor controlling the rotational stability of the camera platform, the bending stiffness of the leg cross-sections. When you reverse your twisting ...
  • You are correct.  The YN 622N TX can't talk to the YN RF-603 II units.  The YN 622N transceiver is the appropriate receiver.  Although it is a TTL unit I believe it should fire your studio heads ...
  • The wake up upon half-press to works well with my Nikons.  It requires the 560III to be in RX mode and the RF-603II must match your camera brand. To use this feature while the flash is on-camera ...
  • Releasing the camera shutter will wake my YN 560III units although the flash doesn't fire for that exposure. In addition pressing the "Pilot" button also wakes the YN 560III. You also have the ...
  • That won't work either.  The PC connection only contains the "fire flash" center-pin signal.  The other flash functions are communicated via the four Canon proprietary pins in the hot-shoe.  A TTL ...
  • I suspect your camera is detecting flash is being used because of the way a TTL flash communicates with it and camera's firmware is responding. The change to 1/60 shutter speed change is probably ...
  • The S1/S2 optical sensor on the Neewer flash is waiting for a burst of light from another flash. This can be your camera's built-in flash or a separate flash in the hot-shoe. When the burst is ...
  • Consider an RF (Radio Frequency) flash trigger instead of a flash cable if "anywhere" is more that a meter or few feet from the camera.  Longer cables are a tripping hazard.  :-( RF flash trigger ...
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Last upload Jun 26, 2013