Canon's 4x Loupe. Choosing the best shots from the numerous rolls of 35mm negatives or slides can be more strenuous than you think. A high-quality loupe can ease the strain and help you check for precise focus and detail. Viewing clear, low-distortion images is the key to making quick selections. In response to popular demand, Canon has developed a high performance loupe for such purpose with its 4x loupe. This 4x loupe features a very high resolving power for examining slides and negatives. With distortion corrected and the use of Canon's Super Spectra Coating, a 35mm format frame (24 x 36mm) can be viewed fully and clearly from corner to corner. The 4x magnification is ideal for checking the overall composition and exposure as well as for making preliminary image selections. Easy helicoid focusing with built-in dioptric adjustments, is provided for those who are suffering from astigmatism or far-sighted, to enable for a more precise viewing of the negatives or slides. Interchangeable translucent and black hoods are also provided. There is also a rubber eyecup with or without a strap. The loupe comes with an elegant buckskin case. << Back to Main . 1 . 2 .