Letus35 Flip Ghosting/Double Image

T

Tomiger RoPort

Active member
Well, I just recently fixed my back focus on my Letus35 Flip Enhanced by moving the ground glass. Everything went smoothly and my back focus was correct. I went to class and came back home. I picked up my adapter to go clean it (there was a hair inside somewhere from adjusting the ground glass) and I heard something loose inside. I discovered it was a loose mirror. I tried to get a hold of someone at LetusDirect, but no luck (probably from all the Extreme business), so I decided to take my chances and open up the Letus entirely. One of the narrower mirrors, that are slanted near one of the openings on the housing, was completely detached and the other slanted mirror was pretty loose. I re-applied some glue and put everything back together. Everything seemed fine until I noticed that objects in my image have a transparent "double" of themselves. I hear this can be caused by light leaking into the seam of the housing, but I already put black electrical tape all about the seam. It has to be something with the mirrors. I have a feeling I really screwed something up. I am currently waiting for a response from LetusDirect about sending it in for repairs and how much it would cost. Does anyone have any insight or suggestions about this situation? I just feel really stupid for trying to fix something like this.
 
Anyone? If someone could post some pictures of the mirror setup of their letus it would help greatly. I just can't get the two narrow mirrors in the right position.
 
Yeah I've been trying to, but I haven't gotten a response. I sent an email yesterday afternoon I believe. Right now I am fine, I got two mirrors out, cleaned good and the housing is cleaned up. I believe it could still be fixed, probably not by me, but I feel better that it isn't all assembled horribly wrong right now. Thanks though.
 
Are these front-surface mirrors? They probably are, so you might have put one back backwards. If they are front surface, the glass side should face *away* from the incoming (or outgoing) light. If one is flipped, it will definitely create the ghost image you descirbed, caused by light reflecting off the uncoated surface of the glass.
 
Well both sides of the glass are mirror-like, so I'm not sure they are front surface mirrors, though I'm not familiar at all with front-surface mirrors. How can I tell for sure?
 
Hold the mirror at 45 degress (by the edges, of course) and shine a penlight or laser-pointer at it. Then turn it over and do it to the other side. On one side you should see a faint double-image of the light beam, but not on the other. If you don't, then maybe both sides are aluminized for some reason, then that's not the problem. How thick is the mirror?
 
Bingo, they are front surface mirrors. So, make sure that the non-image doubling side is not reflecting the incoming light, correct?
 
Correct. You don't want any light going through glass, It should just reflect off the aluminized surface.
Let us know if you reassemble it and if that fixes it.
 
I am in the process of putting it back together now. It's hard getting the mirrors position's just right so you can zoom in on the camera without any vignetting. I got that part down, but now, my image is a little bit crooked, so I gotta adjust the mirror some more. But the ghosting is gone. Thanks alot.
 
hahha SUCCESS. I've spent at least 6-7 hours total on this and finally got it. I don't ever want to open up that adapter again, but I'm glad I did this, at least I really know how everything works inside. Thanks sooo much about the front-surface mirror comment.
 
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