A comparator mirror, allowing for side-by-side comparisons, is a valuable tool for various tasks. This guide outlines the construction of a robust and adjustable comparator mirror using readily available materials and tools. A microphone stand provides a stable and easily adjustable base for the mirror. The key is devising a secure method to mount the mirror onto the boom arm.
Mounting the Mirror
A camera mounting bracket with an adhesive plate offers a simple solution for attaching the mirror. These brackets typically feature a standard 1/4″-20 camera mounting screw, simplifying the connection to a custom-made sleeve. The sleeve, designed to clamp securely onto the microphone boom, requires a threaded 1/4″-20 hole to accommodate the camera bracket.
Crafting the Sleeve
While a lathe offers precision in creating the sleeve, alternative methods exist for those without access to such equipment. Thick pipe or tube stock with a diameter slightly larger than the microphone boom can be used. Drilling a hole through a chunk of wood also provides a viable option for the sleeve.
One approach involves utilizing a piece of 1″ stainless steel hex stock. After drilling a 1/4″ hole followed by a 5/8″ hole to match the boom’s diameter, the sleeve is bored out slightly larger for a smooth sliding fit over the boom. Beveling the edges adds a refined touch.
Securing the Sleeve
Precisely marking and drilling holes for the mirror bracket and thumb screws ensures a secure fit. Three holes are necessary: one for the mirror bracket and two for thumb screws to lock the sleeve in place. Ideally, these holes should be positioned on adjacent faces of the hex stock to minimize interference from the projecting thumb screws. A #7 drill bit, followed by tapping to 1/4″-20, completes the sleeve.
Assembling the Comparator Mirror
With the mirror adhered to the camera bracket, the bracket is screwed into the sleeve. Finally, the sleeve is clamped onto the microphone boom arm. This setup yields a stable, adjustable, and functional comparator mirror system. The result is a sturdy and versatile comparator mirror ideal for detailed comparisons.
