We are now carrying stock of the Yongnuo CTR301P wireless flash triggers, and the RF602/C (for Canon) and RF602/N (for Nikon) wireless flash triggers. Yongnuo triggers have been getting great reviews on various photography sites, such as Flickr and dpreview.com.

So why are we carrying two different Yongnuo flash trigger systems?

Both systems will mount and work with almost all DSLR cameras with a hotshoe, and almost all speedlight and studio flashes, except for Sony/Minolta equipment. The main difference between the two systems are as follows:

1. Wireless frequency and Wireless range: The CTR301P works on the 433mHz frequency, making it compatible with other 433MHz systems such as the Cactus wireless flash triggers. The range of the CTR301P is around 10m, which is fine for most studio or outdoor photo shoots. The RF602 works on the 2.4GHz frequency, which provides a range of around 100m, and a stronger signal in buildings with interference issues. We have a customer who was having interference issues using his cactus remotes with his Canon 5D. Moving to a RF602C trigger and three RF602RX receivers has removed any interference issues, and he is now getting great results from his 3 flash set up for real estate photography.
2. Mounting System: The CTR301P receivers has a1/4″ thread mount on the base, which fits on a standard light stand, whereas the RF602 as a standard Hotshoe mount. If you want to use these wireless flash triggers with speedlite flashes, that means you need a FH02 umbrella/flash mount for RF602, and a FH07 for the CTR301P  wireless triggers.
3. The RF-602 can also be used as a remote shutter release, so they serve a dual purpose.

Whichever solution you choose, you are bound to get great value, and increased options for  your off-camera flash setup.

For those of you who are sceptical of using Rechargeable battereis in radio microphones, Mike over at Church Tech Arts has done some thorough runtime testing of various AA rechargeable batteries in Shure UHF-R UR2 microphones with SM-58 capsules. Mike also includes ProCell Alkaline batteries as a comparison for those using Alkaline AA batteries .

The Powerex 2700 AA and Sanyo 2700 AA both had the longest runtime at 14 hours, eneloop came in at 11 hours, and the alkalines ran for 9.75 hours. You can be assured that quality recargeables will pay for themselves. Mike tested a set of 4 year old rechargeable AA’s and found they were still outperforming Alkaline batteries by 4 hours.

Mike has a great overview of why you may have been burned by rechargeables in the past.

Click here for a full explanation of the test setup Mike used.

Read more about Tony’s experience here.

Powerex AA 5 pack for Nikon SB800

We have a fair amount of customers who shoot Nikon, and many of you doing a lot of off camera flash photography in weddings and portraits are using SB800 speedlites. So we talked to MAHA about packaging up their batteries in 5 packs rather than 4 packs, and we now have the Powerex 2700mAh AA battery 5 pack, including an 8 battery case

Should we also introduce a 5 pack of IMEDION AA’s for those of you who are after a low self discharge solution for their SB800?

The ten types of batteries tested were as follows:

Sanyo eneloop “Pre-Charged” – 2000mAh, MAHA Powerex – 2700mAh, MAHA Powerex Imedion “Pre-Charged” – 2100mAh, Rayovac Hybrid “Pre-Charged” – 2000mAh, Rayovac “15-Minute” Rechargeable – 2000mAh, Duracell DX1500 Rechargeable “Pre-Charged” – 2000mAh, Kodak Rechargeable “Pre-Charged” – 2100mAh, Energizer Rechargeable – 2500mAh, La Crosse Rechargeable – 2600mAh, Energizer Max Alkaline – “Use by 2013”

Given that this test was conducted in the USA, some of the tested brands are not available in Australia, however, the significant results are that the Powerex 2700 AA rechargeable batteries provide the faster refresh time than any of the other batteries, and the IMEDION provided the fastest flash refresh time among all the Low discharge (ready to use) AA batteries.

Another significant result is that the Powerex IMEDION AA batteries provided more flash pops that all the other brands of low self discharge (ready to use) AA batteries.

You can read the (extensive) test results and procedures at the Photography on the net forum

Earlier this month I was interviewed about battery technologies by Gary Stark of the Gadget Grill. We talked about the difference between Lithium batteries, Nickel Metal Hydride (NiMH) batteries, Nickel Cadmium (NiCad) batteries, and Alkaline batteries. We also talk about the difference between smart chargers and timer chargers.

If you want to have a listen, browse on over to The Gadget Grill, or you can download an MP3 Podcast of the interview here. The interview starts at about minute 17.

Read all the details of the test here

For simplicity’s sake, I have taken the figures from the 4 commonly available brands available in Australia  (Sanyo Eneloop, Duracell precharged, Hybrio, Powerex IMEDION) and graphed the results below:

Glen from the DSLRusers.com forum recently did an extensive test of AA battery performance in his Nikon SB-800 flash, mounted on his Nikon D300 DSLR. I believe this is the first time a series of rechargeable AA batteries have ever been tested to see the real world results in a flash, and I am sure a lot of photographers will find this controlled test of real world value when choosing your batteries.

For the test, Glen compared four sets of 4 AA rechargeable batteries to see how many flashes could be achieved from each. Results are as follows:

Powerex 2700mAh = 266 flashes
Energizer 2500mAh = 242 flashes
IMEDION 2100mAh = 218 flashes
eneloop 2000mAh = 204 flashes

If you donʼt use your batteries as soon as you charge them, then test results are different. Some batteries are better at HOLDiNG their charge than others. Here are the results of the same test, 3 weeks after the batteries are charged.

Powerex 2700mAh = 250 flashes
Imedion  2100mAh  = 211 flashes
Energizer 2500mAh  = 208 flashes
eneloop 2000mAh =191 flashes

The Powerex 2700mAh have a higher energy retention rate than the Energizer 2500mAh. The Energizers were found to have a high self discharge rate, so much so that after just 3 weeks, the 2100mAh IMEDION batteries provide more flashes than the higher capacity 2500mAh Energizers.

Glen has noted that he is happy to conduct the test with other batteries if you want to know how yours compare to the four types already tested.

For capacity results and testing procedure details, read the full review here.