Specifications that are not listed below are applied to those of EOS-1N, and to those of EOS-1N with the Power Drive Booster E1 for shooting capacity data. Type 35mm focal plane shutter SLR (Single-Lens Reflex) camera with fixed half-mirror, multi-point autofocus, auto exposure and built-in high-speed motor drive. RS mode with 6 milliseconds release time lag can be selected with the main switch. Viewfinder Fixed eye-level pentaprism. Gives approx. 100% vertical and horizontal coverage of actual picture area and 0. 72x magnification with 50mm lens at infinite at standard diopter (-1) without image blackout. Focusing Screen (standard) New laser-matte screen with fine spot metering area mark. (Seven optional interchangeable focusing screens are available, must be exchanged at an Authorized Canon Service Facility). Shutter Double shielded vertical-travel focal plane shutter; all speeds electronically controlled. Release time lag (excluding AF operation) in "RS" mode: 6 ms (0.006 sec.) (time required to start exposure by pressing the shutter button completely after sub-mirror operation by pressing the shutter button halfway). Mirror Fixed hard-coated pellicle mirror (reflection: transmission= 35: 65)     Autotocus AF Working Range EV-1 ~ 18 at ISO 100 Autofocus Modes One-shot and Al Servo with Focus Pnediction. (Al Servo is automatically switched to One shot when the main switch is set to RS mode.) Manual focusing possible. (Electronic manual focusing possible during continuous exposure.)     Exposure Control AE Modes Depth-of-Field AE is not available Metering Range Evaluative and partial: EV 1 ~ 20 (normal temp., EF 50mm f/1.4 USM, ISO 100) Fine spot: EV 2 ~ 20 (same conditions as the above) Exposure Compensation AEB (Auto Exposure Bracketing) can not be set and performed in RS mode. (If AEB is set with the main switch set to "A", it is automatically canceled when the main switch is set to "RS ".) Depth-of-Field Preview With depth-of-field preview button. (By pressing the shutter button halfway in RS mode)     Film Transport Film Rewind Automatic (approx. 4.5 sec. with 24-exp. film). Mid-roll rewind possible. Rewind Noise 60 dB in normal mode, 50 dB in Silent mode Maximum Film Winding Speed (shutter speed: set to 1/1000 in the RS mode and to 1/250 sec. for normal mode)   RS Mode Normal mode One-shot AF/Manual AI servo AF (High-speed continuous) 10 fps 6 fps 5 fps (Low-speed continuous) 3 fps 3 fps 2.5 fps Others Custom Functions All the functions are applied to those of EOS-1N except for No. 12, which activates O cancels the AF in-focus beep tone. Power Source Eight AA-size alkaline batteries, AA-size lithium batteries, AA-size Ni-Cd batteries, or Ni-Cd Pack E1. Dimensions 161 x 155.9 x 78 mm (W x H x D) [6-5/16" x 6-1/8" x 3-1/16"] Weight 1,300 g/2.9 Ibs without batteries; 1,500 g/3.3 Ibs with 8 alkaline batteries.