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。