Resolution, softness and back focus...

[mdo]

Unless... Jim is Santa...!

Probably as close as it gets.

 

[Stephen Pruitt]

I would be VERY interested in a RED Boot Camp. . . and I'm one of those who will defiinitely need it!

Merry Christmas to all. . . and to all. . . a RED night.



Stephen

 

[Warren Kommers]

I wonder how sharpening would be dealt with if one was planning a film-out to 35mm for release prints.

Testing testing resting and then more testing.

 

[Gavin Greenwalt]

As far as I can see, the chain affecting focus perception we have:
1. Quality of the lense
2. Precision of set focal distance
3. Precision of back focus
4. Degree of OLPF
5. Quality of Debayering
6. Amount of Sharpening

7. Contrast of the Scene (original or in made in PostProd )

8. Resolution shot/displayed at. (A 2k image will look softer than a 4k image)
9. Amount of noise/grain. (Noise and grain act as a light amount of perceptual sharpening.)
10. Shutter Speed.
11. Amount of movement in scene.
12. Aperture size.

 

[BASSAM MSSALATIE]

Thanks Jim.
What probably has created a bit of confusion is that RED has attracted a lot of people coming from prosumer video world who see in RED a chance to to make the big leap, people completely unaware of back focus and lenses issues. What we probably need is some sort of sticky thread that could work as a BASIC tutorial for checking back focus, lenses and make needed adjustments to lens mount and/or lenses. Probably going through all threads one could find necessary info and put all pieces together but a quick summary for the lenses uninitiated would be really great.
Unfortunately i'm no good for it ... any volunteer? :innocent:

nice i think we have to suggest that ...:shifty: maybe we could
ask david
thread maybe he will help :construction:

 

[BASSAM MSSALATIE]

... lots of things to do. Can't sleep. Must solve problems... must solve problems...

Jim

Jim GO sleep well man we need you healthy:cold: happy solving problems .thanks
Happy Holidays.:blush:

 

[Jannard]

1. The new mount helps a ton.
2. Realization is the 1st step to the road to recovery.
3. We will develop tools for easy checking of the back focus.

Jim

 

[Jannard]

Jim GO sleep well man we need you healthy:cold: happy solving problems .thanks
Happy Holidays.:blush:

I refuse to shave, shower, sleep or change my underwear until every RED customer is happy...

Well, the sleep part is true.

Jim

 

[BASSAM MSSALATIE]

for me iam happy even i am late for Red . ithink most of us here are happy with red and it's team ,unless he is selfish..
just take a rest :angry03: and everything will gonna be fine .:detective2:

 

[Gavin Greenwalt]

I refuse to shave, shower, sleep or change my underwear until every RED customer is happy...

Well, the sleep part is true.

Jim

In unrelated news all RED cameras will now ship with an air freshener in the box.

 

[Mark L. Pederson]

3. We will develop tools for easy checking of the back focus.
Jim

THAT is fantastic Jim.
You never stop impressing me.

Merry Xmas and Happy Holidays to you, your fiance and and your family. Wishing you much success in all matters in 2008.

Looking forward to a 4K projector ...

 

[Stephen Williams]

.

Then all you have to do is:

1. Check back focus
2. Check your lenses (re-mark if necessary)

Jim

Hi Jim,

Can you outline your recommended procedure for the above.

Happy Christmas

Stephen

 

[Jannard]

1. Until we get a tool out for our customers to use, you will need the factory (that would be us) to set it right and a good tech to check and set if necessary.

2. This is usually done at a good rental house or by a qualified lens tech.

After we release our tool, it will be very easy to check/set back focus of the camera, then check lenses using a chart setup referencing the camera.

Jim

 

[Mardi_Gras]

I refuse to shave, shower, sleep or change my underwear until every RED customer is happy...

Well, the sleep part is true.

Jim

With the risk of coming accross as an uber "drunk fanboy" like some of us have been so labeled, I have to say Jim, your statement above nulls all of my wait-anxiety and other pressures associated with shooting on the Redone, if you know what I mean.

Thanks for being so passionate about something we're mostly all passionate about - a great tool for the struggling filmmakers here.

 

[Jannard]

Passion begets passion.

Jim

 

[Michael Lindsay]

After we release our tool, it will be very easy to check/set back focus of the camera, then check lenses using a chart setup referencing the camera.

Jim

thank you...!

Michael Lindsay

 

[Tim Lüdin]

Yeah it's realy Christmas. A new back focus tool for all of us. This is exactly what I was hoping for.
This will make life a lot easier.

Thanks guys. This is great news.
Merry Christmas

Tim

 

[Mardi_Gras]

Passion begets passion.

Jim

Indeed my friend... indeed.

 

[Rudi Herbert]

Jim refuses to shave, shower or change underwear (maybe that's how he can get so close to those bald eagles) and Mark is supposed to be in the south of France and still he's posting more than most...what is the world coming to?

Ah, the wonderfully demonical viscious circle of creation has finally engulfed Jim whole, whereby problems are now nothing more than blessings in thin disguise, for as they arise, a solution is feverishly sought, found and proved, and then all that is left is creating it and implementing it, leaping the RED in forward quantums to its ultimate goal. It was good knowing Jim while we was still sane...

 

[I Bloom]

I think I started a monster with these numbered lists:

1. Quality of the lense
2. Precision of set focal distance
3. Precision of back focus
4. Degree of OLPF
5. Quality of Debayering
6. Amount of Sharpening

7- CONTRAST OF THE SCENE (original or in made in PostProd )

8. Resolution shot/displayed at. (A 2k image will look softer than a 4k image) (depending on the degree of magnification, aye)
9. Amount of noise/grain. (Noise and grain act as a light amount of perceptual sharpening.)
10. Shutter Speed.
11. Amount of movement in scene.
12. Aperture size.

Yeah there are alot of things that affect perception of focus, I didn't bring these up because they aren't really related to the quality and calibration of your imaging setup.
#9 is a good thing to bring up though Gavin. Because noise through Redcode seems to be naturally softened and that is perhaps affecting overall perception of sharpness. So lets add one more:

13. Ratio of compression.

IBloom