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01-09-2010, 02:06 AM   #1
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Cactus v4 vs YongNuo RF-602 for K100D and K-7

Hi

I am looking to get 1 transmitter and 2 wireless receivers to learn more about flash photography.

I have the Metz 48 and 360FGz flashes. Based on my research, it would appear that the YongNuo RF-602 is unable to wake the 360FGz after it has powered itself down after 3 mins. There is also the issue of max. sync speed with the RF-602 with most posts saying that 1/125s is really the more successful sync speed possible.

Well, I am intending to use the wireless combo on both the k100D and K-7 and I would appreciate a minimum 1/180s sync speed on the k100D and perhaps 1/250s sync speed on the K-7. I gather the YongNuo RF-602 is no go for this?

So I am also looking to get the Cactus V4 which is reported capable of syncing at a speed higher than 1/180s. BUT, I cannot confirm if this is really so. Could anyone please confirm?

Also, can the Cactus v4 wake up the 360FGZ?

Appreciate some insights.

Cheers
Raider

01-09-2010, 09:13 AM   #2
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Unfortunately you can't disable the auto-shutoff in the 360 but you can in the 540. But if you shoot in wireless slave then it won't auto shutdown, just FYI

I've used V4s up to 180sec with no problem, except used with the Sigma 530 Super. The Sigma and Cactus sync at 1/125 sec. Any faster and you get a black bar at the bottom of your image when shot vertically.

I figure the Cactus can handle 1/250. I havent read anywhere that they can't.

BTW, I see you have the Tamron lenses for most of your range. How's the 70-200?

Last edited by jboyde; 01-09-2010 at 09:15 AM. Reason: question
01-09-2010, 04:00 PM   #3
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Thanks for the feedback.

Do you think that the cactus v4 is superior to the yongnuo unit or the other way around. Is yongnuo's flash sync speed of 1/125sec a limitation that is highly undesirable in practical shooting? I seem to also read that most people think that the yongnuo triggers are better built (and with more features) than the cactus.

BTW, the tamron 70-200/f2.8 is quite good actually (imho). I think the focus speed is acceptable on my K-7. On the K100D the focus is slightly slower but still okay. Some people are leaning over to the sigma 70-200 HSM so I think u should prolly consider that too if you are looking to get a 70-200.
01-10-2010, 08:51 AM   #4
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After reading some articles about the Yonguo I'm intrigued. They say the max sync speed in 1/250 so you'll be in the clear with the K-7. I haven't had much range problems with my Cactus triggers, they've been fine up to 40 ft thru walls so I'm probably going to stay with them until they start going. Why don't you pick up a set of the Yonguos so you can report on it? You can get them from Gadgetinfinity.com out of Hong Kong.

The 70-200 is a beast! Do you hand hold your cam when you use it or do you make use of the tripod mount? When I saw that I figure that if I buy one its not leaving the studio!

01-10-2010, 04:28 PM   #5
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I communicated with the ebay seller and was informed that the yongnuo is only capable of max 1/180sec sync speed. It is the reports from many end users that the max. sync speed under practical usage is limited to 1/125sec.

I ususally handheld the 70-200 if I am taking fast pace shots but if I am not, it is almost always on the tripod. A bit too heavy to handheld for long duration.
01-10-2010, 04:52 PM   #6
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QuoteQuote:
and perhaps 1/250s sync speed on the K-7
K-7 got firmware pushed its sync speed to 1/250? I thought it was 1/180
01-11-2010, 01:52 AM   #7
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Yes. u are right. my bad. K-7's sync speed is also 1/180s.
01-11-2010, 07:21 AM   #8
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I have only used Cactus V4, so here it goes: I have problem syncing 540FGZ in winter time (even indoor); mind you I am in Canada so if your area is warm this should not trouble you; [As I put the setup on the heat outlet in the house for a minute, it sync to 1/180 otherwise it only sync at 1/20 or slower] Other old flashes have no problem and sync 1/180 all times.

01-11-2010, 11:55 PM   #9
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Never had any issues with my Cactus V4 at 1/180 with any of my flashes. I see their big advantage in their compatibility with flashes whose trigger voltage ranges from 0-300V. With other radio triggers you often need to stay between either 0-12V or 12-300V or similar.

Last edited by Class A; 01-12-2010 at 06:23 PM.
01-12-2010, 05:02 PM   #10
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Thanks for the feedback. I think I might just go get the Cactus V4.
01-12-2010, 06:27 PM   #11
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QuoteOriginally posted by raider Quote
I think I might just go get the Cactus V4.
I think you will be happy with them. I got mine from gadget infinity and their service has been awesome (in how they responded to all my questions).

I personally don't get the 30m reach as advertised but then I haven't tried new batteries (I use the ones they came with) and/or a location that is guaranteed to be free from radio interference. For everything I wanted to do with them, the reach has been more than sufficient and they were a 100% reliable.
01-12-2010, 09:40 PM   #12
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Thanks Class A! Appreciate ur feedback.
01-12-2010, 10:00 PM   #13
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I have a set of the v4's with two receivers and have taken hundreds of shots with them. Within my practical range so far (5-25 feet) they have not failed. In fact the only thing that did fail was one of my Vivitar 283's...

Have to pick up another one of those, and a 3rd receiver. (currently use optical slave for the 3rd light) I've got two vari power adapters for those, the awesome thing about the 283's w/adapter over the 285HV is you have more range, down to 1/64th power if you want.
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