HM855 has no optical image stabilization, while HM 1 has full-time optical image stabilization, which is very necessary for users who are not professional photographers. In addition, HM 1 has a manual adjustment lever and shortcut keys, which is very convenient for users who want to shoot professional videos. The lens configuration of HM 1 is higher than that of HM855, but the wide angle is smaller than that of HM855.

To put it simply: if you want to buy a stupid DV, choose hm855, which is simple to operate and does not have the manual adjustment lever like most DVs. Playing is automatic. Suitable for ordinary users.

If you still want to play a career, choose HM 1. There is automatic but the main play is manual, which is convenient to achieve the shooting effect you want. Suitable for people who are a little interested in photography. Someone used it to shoot weddings. Many people say it is a professional camera, but strictly speaking it belongs to a semi-professional camera.

I hope my answer is helpful to you, hehe.