Both the Model 6 and Model 7 have turret mounted twin objectives which allow a choice of magnifications with each model. The Model 6 has 10X and 30X magnification and the Model 7 x 20 and 40X, with alteration of the magnification being achieved by rotating the turret. Additional increased magnification is possible with 20X additional eyepieces. However, the objectives are factory fitted and cannot be altered. Inbuilt incident and transmitted illumination (spare bulb available).