My 17" Projector

[superdaveumo]

Yes I did say the opaque projector lens wasn't absolutely suitable. It's not. If you look at the Charmed and UT2004 screenshots, notice the 4 corners are more blurred than the middle. The 16:9 shots don't look blurred because the corners are not used. It's a 1280x1024 screen and at 16:9, I'm only using 1280x720; removing the corners from use. Anyways, everywhere else on the screen looks great! Movies you don't even notice it unless you stop the movie and examine the screen closely.

The wall I mentioned is the same wall that the MDF screen is mounted on. So if you look at the MDF screen pics, you can see the wall behind it. If you look at the shot of the MDF screen mount, you can see how the wall is textured. The difference you see in the photos is about the same difference in real life.

[pepe303]

I meant someone else, not you, who claimed in "another" forum, that opaque lens is not suitable. You got very nice results with this lens. And your desing is almost LL-free

How about the brightness? I checked the picture of football players, it was shot with 0.8s exposure time and f=2.8, which is pretty well compared to typical results of other DIY projectors. What is your screen size?

[Rox]

Originally posted by pepe303 So opaque lens can be used with success [/B]

I have said it lots of times.

The lens can be used?

YES, there are no hidden forces that make the lens crack or makes the triplet fall down when you turn on the projector .

Is the image accptable?

I can´t answer this question for you, I only can say it is not accptable for me, and not for some people I heard about having a 17" and this triplet.

But those next points are FACTS;

1)This lens was not designed for any image source larger than 12" diagonal.

2)There is nobody claiming corner to corner focus with this lens and 17".

3)There are some unsatisfied 135 triplet owners.

[superdaveumo]

Let the peace remain. No the lens isn't razor sharp from corner to corner. No you can't really see the blur when watching movies. Yes it's definitely noticable when working in WinXP / Linux / MacOS.

If your application necesitates a razor sharp image (corner to corner) and a 17" LCD then I'd say use something else. Else, I think this lens will work just fine. Movies, games, pictures, etc.

[Quinn]

The 16x9 portion of the screen is close to perfect pixel focus?

thats all i need anyways

[Mikey p]

superdaveumo,

Could you tell me the width and length of the Beseler lens you're using? I also bought a 18 inch focal length opaque projector lens but there is no manufacturers name on the lens. I'm curious if the dimensions of the lenses are the same.

Mike

[superdaveumo]

My lens is slightly off as far as centered on everything. With this being said, the left side on my projector is a little out of focus. Here are some pics to show you what I mean. They are all 16:9; 1280x720. They have been corrected for barrel distortion, the JPEG compression increased, and image cropped. In real life, the lighting is even ( minus the right side being a little darker) and the pictures are sharper / cleaner.



If you check the link about the opaque projector, it'll give you all the dimensions of the projection lens.

[Mikey p]

If you check the link about the opaque projector, it'll give you all the dimensions of the projection lens.

Ah yes, there they are. My lens is the same diameter and 8mm shorter in length. Hopefully my results will be comparable to yours.

[ramkishan]

Our design and placement at ceiling height at a distance of 22 feet may be useful to some persons as the room is not cluttered with the projector. The details can be seen by clicking the link below:-
http://www.drtsolutions.com/Projector.htm

[shardian]

ramkishan,

I know you are trying to help and everything, but your posts are borderline spamming. This time, your post really has nothing to do with the topic at hand. If you have something of interest to say, then say it. If you want to include your website, then put it in a signature.