三脚架便携投影幕布产品图

写实产品摄影，白色无缝背景，中央是一块展开的便携式投影幕布。幕布为灰白色矩形布面，左右边缘有黑色竖向包边；顶部为深蓝绿色金属横杆，带有一个小挂钩或夹扣；底部为同色圆柱形卷轴外壳，左右两端有浅色端盖，外壳表面有小型白色文字标识。银色金属三脚架支撑，中央立杆连接三根倾斜支腿，支腿之间有细金属斜撑，脚端有黑色防滑脚垫。正面略低机位平视，完整纳入幕布与支架，构图居中，柔和均匀的棚拍照明，浅灰白背景，竖向画幅比例约3:5。

Realistic product photography, seamless white background, a portable projection screen fully extended in the center. The screen has a gray-white rectangular fabric surface with black vertical side borders; the top is a dark teal metal bar with a small hook or clamp; the bottom is a cylindrical dark teal housing with light-colored end caps and small white text markings. A silver metal tripod supports it: a central pole, three angled legs with thin metal braces, and black non-slip feet. Frontal slightly low eye-level view, the entire screen and stand included, centered composition, soft even studio lighting, pale gray-white background, vertical aspect ratio about 3:5.