Rosco's Heavy Duty 3/8" Extension Spindle is an optional accessory for the Rosco Heavy Duty Wagon Brake--used when working with heavier (up to 800 lb/362.8 kg) rolling scenery.

For Wagon Brakes for Rolling Scenery

Optional accessory to be used with the Rosco Heavy Duty Wagon Brake

Related Questions and Answers

Q: 1. how much do these weigh?

A: The total weight of this Meike MK-RF-AF1 13mm and 18mm Extension Tubes for Canon RF would be 2.5 oz. The 18mm Extension Tube would be 1.4 oz, and the 13mm would be 1.1 oz.

Q: 2. Is this compatible with Godox AD600BM?

A: Yes, this is compatible with the Godox AD600BM.

Q: 3. does this come with 2 locking rings?

A: The AD-H1200B does not include 2 locking rings.

Q: 4. Is there a cable like this that will connect two AD 600 Pro TTL units?

A: No, there is not one like the Godox AD-H1200B Portable 1200Ws Extension Head to attach two AD600pro together.

Q: 5. Does this come with the 1200 watts flashtube?

A: Unfortunately, the flashtube is not included with this product. The Godox Replacement Flash Tube for AD-H1200 Portable 1200Ws Extension Head, BH # GOFTAD1200 is the one you would need. https://bhpho.to/2Tnzu5D

Q: 6. Is this compatible with the AD600PRO?

A: This extension is for use with the Godox AD600BM Witstro Manual All-In-One Outdoor Flash B&H # GOAD600BM.

Q: 7. Would inserting one of these (or any tele converter) between the RF 100-500 lens and the RF 1.4X (or 2.0) tele extender, allow the lens to extend BELOW 300 mm? If so, would the lens then NOT be able to focus to infinity? Thanks.

A: Teleconverters and extension tubes have different usages and are not often used simultaneously. A teleconverter is is designed to increase the focal length of a lens by the multiplication factor listed on the teleconverter, giving you additional reach to your subject. Extension tubes are designed for macro photography, and are designed to reduce the minimum focus distance of your lens while increasing magnification, and also eliminate the ability to focus at infinity or use the lens for normal shooting. Hypothetically, using a teleconverter and an extension tube simultaneously with a telephoto lens would reduce the lens' would allow you to focus closer than the lens' listed 2.95 feet (90 cm) minimum focus distance, and would also prevent you from focusing at infinity, essentially making it a long macro lens. Unfortunately, as this is an unorthodox setup, and as the Canon Extender RF 1.4x and the Canon Extender RF 2x is designed to connect directly to the lens (the optical element on the teleconverter is designed to sit inside the rear of the lens for optimum optical performance), I cannot state if the setup you describe would work, nor if the lens would focus properly with the teleconverter's optical element out of its designed alignment inside the lens, and this would not be something we could test.

Q: 8. Is this compatible with AD600pro?

A: Following this. Have the same question as well.

Q: 9. Are these automatic or only manual?

A: These extension tubes have electronic contacts that maintain full autofocus and auto-exposure functionality for seamless use.

Q: 10. How long is the cable? The listing says "Power Cord (9.8')," but an answer to the same question by the Staff says 6.5 feet. Which is correct? 9.8 feet or 6.5 feet?

A: The Cable Length: 2.4m / 7.9ft