Know Your Rail -- DIY Focus Stacking Part 1
Автор: MJKZZ
Загружено: 2021-03-29
Просмотров: 4825
Описание:
Many people are interested in building their own focus stacking equipment and the rail is usually the first thing they start with. We at MJKZZ/StackRail did the same thing, trying to DIY a focus stacking system for ourselves. However, the BAD rail caused so much trouble and frustration, we decided to make our own (one of them is shown in the video).
Basically, there are two important aspects for a rail: wobble and backlash.
If a rail wobbles too much, as shown in video, at higher magnification, images acquired will not be usable and there would be too much shift even though most stacking software can correct small amount of shift.
If a rail has too much backlash, it can make things very frustrating -- you position the rail and set it up, ready to go. Only when the rail moves to starting position, it is not the position you set. Worse yet, at higher magnification, image could be way off focus.
So, if you want to DIY a stacking solution, picking a rail, ask your rail vendor if their rail wobbles and how much backlash it has before wasting your time and money.
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