Consider using a prime lens.

考虑使用定焦镜头。

Prime lens has no zoom ring.

变焦环转动或推拉不畅顺…

The 50mm prime lens is often a photographer's favourite, perfect for portraits, product photography and low light conditions.

50 mm的定焦镜头总是摄影者的最爱，对于肖像、产品摄影和在弱光条件下表现完美。

There are many, many different lenses available, but Gampat recommends that first-time DSLR owners start off with a simple 50mm prime lens .

市面上有种类繁多的镜头，但Gampat推荐首次购买单反的摄友从简单的50mm定焦镜头入手。

The 50mm prime on average allows an aperture around F1.4 on a mid ranged price lens, F1.8 on the cheaper ones and F1.2 on the pro series.

50mm定焦镜头在较大价格范围内的平均光圈是F1.4，便宜的（镜头）光圈为F1.8，较贵的（镜头）光圈为F1.2。

For a slightly wider view than a 50mm prime, a 35mm lens offers more flexibility when shooting landscapes and vistas.

作为视野稍微大于50 mm定焦的镜头，35 mm镜头在拍摄风景和远景时提供了更多的灵活性。

The prime products are spherical lens, Windows, prisms, achromatic lens, cylindrical mirror, laser optical components, infrared optical components, various crystals and some other relative items.

主要产品有球面镜、窗口、棱镜、胶合镜、柱面镜、激光光学元件、红外光学元件、各种晶体。