# Six Early Four-Megapixel Bullet Cameras: An Archived Feature Comparison
Four-megapixel bullet cameras became an attractive alternative to two-megapixel models as sensors, processors, and compression improved. This archived review captures that transition through six examples with varifocal lenses. It preserves the original feature comparisons while separating historical specifications from advice for a new installation. The devices below are historical examples, not a current product shortlist or a new Safsale test. Prices, cloud services, mobile apps, firmware support, and availability may have changed. Verify the exact model and hardware revision before relying on any listed feature. The practical lesson is to compare the complete camera system rather than choose by megapixels alone. Why bullet housings and varifocal lenses mattered A bullet camera commonly combines a housing, sunshield, and adjustable mounting bracket. Some models provide IP66 or IP67 ingress protection, but the shape itself does not establish outdoor suitability. Operating temperature, connector sealing, mounting details, and resistance to condensation all matter. A built-in heater may help at low temperatures, but its cold-start limits and power requirements must be checked separately. A varifocal lens lets an installer adjust the field of view to suit a scene. Motorized adjustment can reduce repeated trips to the camera, especially at height. It changes the optical framing; autofocus then helps restore sharpness. This is different from a PTZ camera that physically turns toward another direction. More pixels can improve detail at a given field of view, but do not make every part of a large property identifiable. The lens, subject distance, motion, lighting, exposure, and compression remain important. Use the archived examples below to build a checklist for comparing security cameras. Reported specifications at a glance Archived sampleReported maximum imageLens rangeLocal storage described Beward BD4680RV2688 × 1512; up to 60 fps at Full HD with a WDR tradeoff2.8–11 mm, f/1.7microSD, up to 64 GB Evidence Apix Bullet / E4 AF2592 × 1520 at 20 fpsMotorized 2.8–12 mmmicroSD; capacity not specified in the source Proto IP-Z8W-OH40M212IR2592 × 1520 at 15 fpsMotorized 2.8–12 mmNo internal recording listed Hikvision DS-2CD2642FWD family2688 × 1520 at 20 fps2.8–12 mm; motorization depends on suffixmicroSD, up to 128 GB Four-megapixel analytics sample2592 × 1520 at 18 fps2.8–12 mmmicroSD, up to 128 GB KENO KN-CE406A33102560 × 1440 at 20 fpsMotorized 3.3–10.5 mmmicroSD, up to 64 GB These image dimensions are not identical even though the products were grouped in the four-megapixel class. Compare the actual horizontal and vertical resolution, aspect ratio, and supported frame rate rather than assuming the marketing label describes one standard image format.
Contents
For related product selection, see Security Cameras.
A relevant Safsale product example is 3MP IP Varifocal Outdoor IR Dome Camera.
For an adjacent option, see AC-D6124v2 IP Camera.
Original technical guide: Safsale Smart Link Academy
Safsale: safsale.com