The RDL ST-ACR2 is an audio controlled relay and part of RDL's "Stick-On" series of equipment. It is designed for reliable operation and quick, easy installation. The ST-ACR2 is designed to switch line-level signals. Two multi-turn trimmers are provided, one for audio input sensitivity, and one for delay control.

The unit can be triggered from signals between -30 to 0 dBu, and an indicator LED allows accurate adjustments of the input sensitivity. The delay control sets the time delay for relay release when the audio drops below the pre-set threshold. The delay can be set from 5 to 50 seconds.

Switching Controlled by Audio Signal    Sensing of Line-Level Signals    Silence Sensing    Senses -30 to 0 dBu Signals    DPDT Switching Contacts    Delay Adjustment from 5 to 50 seconds    Open-Collector SLAVE Output

Small, compact unit can be easily mounted almost anywhere

Switching from line signals

Accepts balanced or unbalanced signals

Silence sensing

DPDT switching contacts

Open-collector slave output

Related Questions and Answers

Q: 1. Will this plate work with the Quataray QSX 9002TM model?

A: This model doesnt mention the specs for the Quataray. It was made specifically for the ultra series. Theres no guarantee that tilt will fit except via trial and error.

Q: 2. Hi, does it still require the diopter for close up shots? If so, will the SLR Magic rangefinder remove the need of the diopter?

A: No, sorry anamorphic does not work that way. If you needed diopters before, you will still need them while using the anamorphic adapter.

Q: 3. Will this fit a platinum plus ultra7000 2 in 1

A: Yes that is what I bought it for. I lost the original one that came with the product. The replacement actually fits better than the original one did - much tighter, secure fit. I recommend keeping the plate on the bottom of the camera when you're walking around without the tripod/monopod (i.e., hand-held shooting). That way you will always know where it is and you won't forget to pack it when you're done with the photo shoot.

Q: 4. I've borrowed this from a friend, and tested it on all of my Vintage Nikon Primes. It worked on my 50, 85, 105, 200 but it created a bad vignette on my 35 and 24. Is there a solution to that, besides not using those lenses?

A: I am afraid most likely nothing can be done. (I wish we could test it) That is because the Anamorphot is simply a cylinder with glass elements in it. While this is fine for the longer lenses, to work with the wider ones, it appears that the cylinder would have to be enlarged. Do know that anamorphic lenses in the 1950's were not very wide either do to design constraints as well. Panavision's venerable anamorphic C lenses only opened to 35mm. Introduced fairly recently, Panavision's newer G series has gotten to 25mm.

Q: 5. Is it possible to find somewhere comparison with and without adapter. I just want to see the difference in angle view between adapter and just lens without adapter?

A: You can check Tom Antos channel on YouTube

Q: 6. Will this work with 700?

A: Please email us with your specific tripod to photo@a href= http://bhphoto.com target= _blank bhphoto.com/a for assistance with your inquiry.

Q: 7. Will it be compatible with voigtlander 21mm, 50mm, 75mm?

A: In terms of vignetting, it depends on your sensor size. If your are using a m4/3 sensor, you will have no problem with the 50 or 75. I will be testing it out on a 21mm voigtlander later this week. So far the widest ive tried is a voigtlander 40mm. For apsc sensors the widest you can go before vignetting is the 50mm.

Q: 8. Will this work on my Vanguard TBH 250

A: Sunpak plates will not work on Vanguard tripods. Use the Vanguard plates: https://a href= http://www.bhphotovideo.com/c/product/878138-REG target= _blank www.bhphotovideo.com/c/product/878138-REG/a

Q: 9. Ive been trying to aling this, but the ring screw mechanism is terrible, any tips?

A: Absolutely agree. My only advice is be patient. Screw it very slowly and carefully. After some time, it seems to screw a little easier. Good luck.

Q: 10. will this fit with the Sunpak 5800D platinum plus?

A: Comparing the sizes of the two quick releases, the bottom foot dimensions are off by a millimeter or so. So I think you have a good chance with this. If you do not like chances, here is a company that specializes in quick releases, especially hard-to-find entry level tripods. https://bit.ly/2AvGgQf