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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Birger Collimation?

M

Mark B.

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What are the steps necessary to properly collimate a Birger mount?
 
Step 1: Receive Birger mount.
Step 2: Stare at it in awe and disbelief.
Step 3: Cry.
Step 4: Collimate.
 
To do this you need a properly calibrated test lens, and a sensitive collimator, with a focal length at least 5x the test lens and preferably close to 10x.

I keep being told it's a do-it-yourself job, and I'm not inclined to believe that. It took me months of using a collimator every day to get used to it and get consistent results.

I don't know how someone with no experience and with no collimator is going to accurately calibrate the FFD of a lens mount. I think a lot of people are going to get very frustrated.

I've been in the movie camera business 15 years, and changing and calibrating lens mounts has never been considered to be a DIY job.

I'm putting on my asbestos undies now...
 
britim said:
http://www.reduser.net/forum/showpost.php?p=187514&postcount=888

http://www.reduser.net/forum/showpost.php?p=187562&postcount=896

http://www.reduser.net/forum/showpost.php?p=192426&postcount=973

http://www.reduser.net/forum/showpost.php?p=194770&postcount=1033

http://www.reduser.net/forum/showpost.php?p=293308&postcount=3550

I'm charging for this next time. :greedy:

Hope this helps.

Brian
Click to expand...

The mechanical Birger side of things seems pretty straight forward. It's the other stuff I'm wondering about. Like, which resolution chart (preferably free off the Internet) is the best to use to do the collimation test? And Birger's been mentioning software to aid in the collimation, but I haven't actually seen any link for that software mentioned. Is that software not ready yet or did I just miss the post that talks about where to go to download it?
 
CinemaTechnic said:
I keep being told it's a do-it-yourself job, and I'm not inclined to believe that. It took me months of using a collimator every day to get used to it and get consistent results.
I've been in the movie camera business 15 years, and changing and calibrating lens mounts has never been considered to be a DIY job.
Click to expand...


The thing is, with RED, we can SEE at once the result of collimation on a huge screen without waiting for the lab, it's not a film camera...SMILE
After 15 years maybe there are new lights to illuminate you !
 
LEON said:
The thing is, with RED, we can SEE at once the result of collimation on a huge screen without waiting for the lab, it's not a film camera...SMILE
After 15 years maybe there are new lights to illuminate you !
Click to expand...

Hi,

AFAIK Red only outputs a 720p image, as long as you dont want to view your images above 720p you will be fine, other people however will want to.

Stephen
 
Lowkus said:
... And Birger's been mentioning software to aid in the collimation, but I haven't actually seen any link for that software mentioned. Is that software not ready yet or did I just miss the post that talks about where to go to download it?
Click to expand...

I've been wondering about that software myself. How does it help? How does it work?
 
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