Description: 25mm/f1.8 features a 7-element, 5-group design. It has a maximum relative aperture of F/1.8 to F/16 through its range. Wide Compatibility: for Canon EOS M3 series, EOS M5 series, EOS M10 series, EOS M50 series and EOS M100 series.When you use 25mm/F1.8 on full frame camera, please change the camera into APS-C mode.. Aperture with 12 Blades: 12 diaphragm blades are crucial to favorable rendition of highlights in the fore and background. keeping the background intentionally blurred to keep the attention of the observer on the main subject. Aluminum body and copper core, compact and lightweight 0.31oz/143g, which is portable for your photography. Specification: Model: 25mm-F1.8 Full frame Available: No Available for Full Frame, Only for APS-C Lens Compatible Camera mount: for Canon EOS M EF-M Mount Cameras Focus Scale: F1.8-16 Closest Focus Distance: 0.18m Blades Number: 12 Diaphragm Blades Construction: 7 Elements in 5 Groups Coating: UMC Size: 51mm * 32mm Weight: 143g Package Includes: 1 Piece 25mm f/1.8 Prime Lens for Canon EOS M 1 Piece Front Lens Cap 1 Piece Rear Lens Cap 1 Piece User Manual Note: Not Available for Full Frame. Please Switch to APS-C Frame Before Use