DP Marcus Larsson SE
Well-known member
Do any have a tips the best why to check the backfocus without RED Focus?
Best
Best
Welcome to our community
Be a part of something great, join today!
backfocus check!
- Thread starter DP Marcus Larsson SE
- Start date
Akos Nyoszoli
Active member
- Joined
- Nov 23, 2011
- Messages
- 26
- Reaction score
- 0
- Points
- 0
Get a set of calibrated lenses, pick a wide-angle, put the camera on a tripod facing to some sharp text or chart, say 1m away. Magnify and find focus on the LCD. Check the mark on the lens. If it's 1m, your good.
Dont forget to check it with the whole set, not just one lens (Wide angle lenses are the most sensitive to back focus, although they have more depth of field).
Dont forget to check it with the whole set, not just one lens (Wide angle lenses are the most sensitive to back focus, although they have more depth of field).
- Banned
- #3
Pawel Achtel
Banned
- Joined
- Oct 12, 2007
- Messages
- 3,648
- Reaction score
- 0
- Points
- 0
- Location
- Tasmania
- Website
- www.achtel.com
There are many ways to do set back focus.
The easiest is to set your back focus to the scales a well-calibrated wide angle lens with long focus throw, like 12mm or 14mm fully opened. I use MP 14mm for this purpose.
Another, method is to use a zoom lens. Open iris, Zoom in, set b/f, Zoom out, fine tune b/f again. Repeat if necessary.
But, the best way is to use NULL Lens or similar specially designed to set b/f.
http://blog.abelcine.com/tag/nulllens/
hope it helps
The easiest is to set your back focus to the scales a well-calibrated wide angle lens with long focus throw, like 12mm or 14mm fully opened. I use MP 14mm for this purpose.
Another, method is to use a zoom lens. Open iris, Zoom in, set b/f, Zoom out, fine tune b/f again. Repeat if necessary.
But, the best way is to use NULL Lens or similar specially designed to set b/f.
http://blog.abelcine.com/tag/nulllens/
hope it helps