Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 26 Aug 2009 (Wednesday) 22:16
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Radio Popper JrX Studio Receiver Mini Review

1,036 posts
Joined Dec 2006
Location: CA
Aug 26, 2009 22:16 |  #1

Hey all,

My new JrX studio receiver came in today and I thought I should clear up some questions people might be having regarding the units with some photos.

I haven't gotten around to doing any range testing, but I think David Hobby's review (external link) covers that well enough.


(1) Canon 30D w/ BG-E2
(1) 580 EX Mk I on camera
(1) Alien Bee B800
(1) Radio Popper PX Transmitter
(1) Radio Popper JrX Receiver

-B800 approximately 2ft. from subject, camera right
-580EX used for triggering, pre-flash only, set to Group A, Manual Mode
-JrX set to Channel 1, Group C

-Post processing done in Lightroom 2.4, no adjustments applied.

TEST 1 - High Speed Shutter

-Camera Settings:
ISO 100, f5.6, 1/320s, 5fps
-B800 Flash Settings (Via PX Transmitter):
Power Level: 3, Tracking Enabled, Flash Dumped Prior to first shot

Results 1


-Notice that I only got a flash in every 5 frames. This worried me at first. But then, I observed that my 580EX was taking a long time to recharge between flashes. Turns out it was shooting at full power for the pre-flash? Not too sure why...the output was off and it was in Manual Mode.
-Changed flash output on Group A (the 580EX) down to 128th for no risk of recycle issues for shot below

Results 2


-Faster response time, down to 1 flash per 3 frames. Hmmm...I didn't think the B800 was having any issues with recycling so I left that unchanged. Power level "3" is pretty low. There are 36 divisions on the PX transmitter. This equates to somewhere in the 1/32nd range on the B800.
-Changed to 3 fps instead of 5 fps for shot below

Results 3


-Surprisingly, all shots had flash! So...seemed like 3 fps is fine for the Radio Popper units. I didn't mess around with this anymore since I normally don't shoot this fast anyway.


-Camera Settings:
ISO 100, f8.0, various shutter speeds, single shot
-B800 Flash Settings (Via PX Transmitter):
Power Level: 6, Tracking Enabled, Flash Dumped Prior to first shot
-580EX Flash Settings:
HHS enabled, 1/128th power

Results 1: Portrait


-Notice the banding once the shutter speed hits 1/320 sec. I brought it back down in the same increments just to make sure. Yep, max sync speed is 1/250 sec on a 30D.
-How about in landscape?

Results 2: Landscape


-Just for fun, I went all the way up to 1/8000sec. Again, a clear banding issue above 1/250 sec. Max sync speed is still limited to 1/250 sec.
-David Hobby posted a while back about tricking your lights into working for you beyond the max sync speed. I think this would apply here also. Again, my power level is very low. If I turned up my power level as I raised my shutter speed, I might have gotten some better exposure results. However, there would still be issues with banding, as I believe the shutter moves at a fixed speed, regardless of the "shutter speed."


-Even in Manual mode, the B800 output cannot be controlled from the flash directly, but must be controlled via the PX transmitter
-Make sure you dump after each change in flash power.
-Why are the dip switches not coded in binary?!?!?! The different channels and groups have this weird switch pattern to them. It would be much more intuitive to use binary instead of having to memorize their channel code. At least they give you a pocket cheat sheet.


For those of you interested, here are some pictures showing my setup for the test and some ways I used velcro to attach the JrX to my AB B800.


01 - Flash mounted to the light stand with an Impact clamp, similar to the Bogen ones, I believe.
02 - Mounting position for my receiver. I figured down would be better since most of the time, my flash will be above me. If the receiver antenna was up top somewhere, at certain angles it would be blocked by the flash itself, lowering the potential range....not by much, but still. I'm not an don't have to do it my way.
03 - Notice the dummy sync port plug. Radio Popper supplies this with the Receiver. The B800's optical slave is disabled when a plug is in. This is crucial for when using the JrX with mixed ETTL setups.
04 - Close-up
05 - Velcro Placement
06 - Velcro Placement

Thanks for reading! Let me know if I can answer any questions.

If anyone wants to add to this, let me know and I'll add your comments/other reviews to this first post.

NOTE: I'm going to be MIA for a few days, so no immediate responses.
Also, I only own (1) PX Transmitter, (1) PX Receiver, and (1) JrX Receiver. Please do not ask about the JrX Transmitter.

Flickr (external link)
Website (external link)

177 posts
Joined Oct 2008
Location: San Diego
Aug 27, 2009 00:44 |  #2

Haha, nice review. I got my JrX's in the mail today too. I tested everything out and it works like a champ. I had some problems with the JrX studio, but it turns out that in storage, the flash bulb in my AB400 came loose, after putting it back into place, everything was just fine (for a second, I thought I would have to turn in one of my units back already).

I think I'm gonna need to find some gaffer's tape and some velcro to mount my units (I like being able to keep it clean without hassle)

1,211 posts
Joined May 2007
Location: Sarnia Ontario Canada
Aug 29, 2009 10:52 |  #3

Thanks for the mini reciew, I'd love to see some with the high speed andd increaed power to strobe. A useable 1/1250 would be nice

sponsored links
(this ad will go away when you log in as a registered member)

4,520 views & 0 likes for this thread
Radio Popper JrX Studio Receiver Mini Review
FORUMS General Gear Talk Flash and Studio Lighting 
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.

POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©

Latest registered member is rush1981
902 guests, 309 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018 Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.