quote:

---

Some credits are nice and crisp, while others are overburned ( I guess thats the word I'm looking for). But, you are right about the ghosting. I had a few people walk out 3/4 way through the film, saying ...."why would anyone one pay to see this s#@!. But, hmmmmm, they did pay to see it

---

quote:

---

Of course, travel ghost (the shutter not completely blocking the light during film pulldown) is most visible on white titles against a black background, like closing credits. It's usually more visible on the right hand side of the image. If you see travel ghosting, by all means adjust the shutter timing or consider changing the shutter to a larger blade. Be sure you do not have excessive "play" in the gear train between the intermittent drive and the shutter shaft. If I see travel ghost anywhere, I bring it to the attention of the theatre so they can fix it.

---

quote:

---

We have had circumstances where the ghosting was horrible but you could only really tell when words where on the screen (beginning and ending credits).

---

Even if the travel ghost is not severe enough to be visible in the picture, I would consider noticeable travel ghost in the closing credits to be "Film Done Wrong" . And most movies have at least a few scenes with lights against a dark background (e.g., car headlights, streetlights, lit buildings) where even a bit of travel ghost would be distracting.

Hope you can get it fixed ASAP.
 

---

Posted by David Stambaugh (Member # 1102) on 10-28-2003, 05:56 PM:
 
I find travel ghosting *very* distracting. Nip it -- Nip it in the bud!
 

---

Posted by Manny Knowles (Member # 1171) on 10-29-2003, 06:44 AM:
 
Ghost in the top half -- shutter is late

Ghost in the bottom half -- shutter is early

...or is it the other way 'round?
 

---

Posted by Steve Kraus (Member # 476) on 10-29-2003, 08:18 AM:
 
Ghosting above titles or other item of interest means you're seeing the frame leave the gate (downward film travel projecting upwards on the screen due to the lens flipping the image) which means the shutter is late and didn't hide the image before the film travel began. Ghosting below means the shutter is early as you are seeing the image projected just as the film is coming to a stop.

Ghosting both above and below means you have an undersized shutter blade incapable of hiding the entire pulldown period or some lamphouse vs. projector issues where the physical size of the shutter blade is unable to completely block the cone of light.
 

---

Posted by John Pytlak (Member # 331) on 10-29-2003, 08:34 AM:
 
If the severity of the ghosting seems to waver, coming and going, check for excessive play in the gear train between the intermittent drive and the shutter shaft. If it is perfectly constant, it's likely due to incorrect timing (ghosting above OR below light areas), or insufficient shutter blade size (ghosting above AND below).
 

---

Posted by Gordon McLeod (Member # 33) on 10-29-2003, 12:08 PM:
 
Also if the projector is belt drive check belt tension
 

---

Posted by Travis Hubrig (Member # 1745) on 10-30-2003, 03:19 PM:
 
From time to time I will make a new test strip for checking timing (travel ghost)...

I will cut the credits from a few old trailers, it is very easy to adjust when looking at the dark background.
 

---

Posted by Ken McFall (Member # 845) on 10-30-2003, 03:55 PM:
 
Simple way to remember how to adjust the shutter is BRAT...

Bottom Retard, Advance Top. One of those silly little things I was told many years ago by a seasoned engineer that has stuck with me.
 

---

Posted by Steve Guttag (Member # 268) on 10-30-2003, 05:42 PM:
 
Even easier...trails up, turn shutter blade up...trails down turn the blad down.

Steve
 

---