Optically Worked Double Convex Glass Lens, 75mm Diameter, 1000mm Focal Length Material_Brass Chrome-plated 60mm reading magnifier extending

Chrome-plated 60mm reading magnifier extending to a 20cm focal length

Used to add variable resistance while keeping the slide-wire wiper enclosed

Compares 2-

Used for controlled drop-wise addition of reagents during synthesis

holding pH stable at 25 degrees C for calibrating meters and electrodes at the standard low-acid reference point

Optically Worked Double Convex Glass Lens, 75mm Diameter, 1000mm Focal Length Material_Brass Chrome-plated 60mm reading magnifier extendingDesigned for parallel beam refraction work, this 75mm double convex glass lens at 1000mm focal length runs at f 13, near collimated for astronomical analogue and long throw projection setups.