Ngày nay người ta có thể làm mọi việc chỉ với một nút bấm trên thân máy ảnh số mà đôi khi quên rằng, một vài thập kỷ trở về trước thì việc phải chỉnh hoàn toàn các thông số phơi sáng, lấy nét trên ống kính là hoàn toàn bình thường và cần thiết để có thể cho ra đời một bức ảnh đúng nét và đủ sáng.

Cho tới giờ, ống kính chỉnh tay vẫn được sản xuất và sử dụng bởi nó vẫn đem lại được rất nhiều lợi ích, và thậm chí là có những ứng dụng cụ thể đem lại khả năng thực thi tốt hơn là lấy nét hoặc đo sáng tự động.
Tóm tắt video:
Có thể tạm thời chia ra ba nhóm là
Ống kính thiết kế chuyên cho kỹ thuật số với khả năng chỉnh tay trên ống kính được tối giản
Ống kính thiết kế cho việc lấy nét và đo sáng tự động, nhưng vẫn cho phép người dùng chủ động hoàn toàn trên ống kính
Ống kính thiết kế chỉ cho việc chỉnh tay hoàn toàn, không có kết nối điện với thân máy
Ống kính Manual thiết kế tối ưu cho chỉnh tay
Các thông số rõ ràng
Vòng quay thuận tiện, êm mượt, chỉ cần cảm giác mà không nhìn cũng có thể chỉnh đúng
Gọn nhẹ, chất lượng quang học tốt,
Rất nhiều hãng sản xuất ống MF và có thể lắp vào các máy khác nhau với ngàm chuyển mà không cần phải có kết nối điện
Ngàm chuyển của một số hãng còn có thể hoạt động như chiếc ống nối extention tube (bellow) giúp kéo gần lại khoảng lấy nét tối thiểu – có thể chụp cận cảnh hơn khả năng sẵn có của ống kính.
Các ứng dụng mà MF ưu thế
Chụp phong cảnh: tính khoảng lấy nét ngoại tiêu (hyperfocal distance) và chỉnh tay vào đó
Chụp macro: đằng nào cũng chỉnh tay là chính
Chụp rất thiếu sáng: tự động lấy nét rất khó khăn
Chụp chuyển động rất nhanh: canh nét vào sẵn một điểm và chờ khoảnh khắc
Ngoài ra ống kính chỉnh tay vẫn có thể chụp được mọi ứng dụng như những ống AF khác, dĩ nhiên nó đòi hỏi kỹ năng thành thục hơn và hiểu thiết bị hơn.

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