Could someone please post photos of the worst of these reflections ???... TIA
Are they sharply defined (if somewhat dimmer), or are they just blurred points of light/streaks etc ?
I will definitely try this, and thanks to everyone for this awesome thread 😎
That's good news DB. It would be great if they can be treated for around $40 - $50
Are they sharply defined (if somewhat dimmer), or are they just blurred points of light/streaks etc ?
I will definitely try this, and thanks to everyone for this awesome thread 😎
That's good news DB. It would be great if they can be treated for around $40 - $50
How large are these completed assemblies? I looked at the CAVX diagram on Mark's homepage, and the height and width are listed (200mm and 175mm respectively), but what is the distance from the back to the front? I realize that this will depend on the angle and size of the prisms and if it is a 2 or 4 prism setup. I have a large projection lens, and am not sure if I will be able to fit everything close enough.
Let me know if this has already been discussed, and I'll read back through. (I read pages 60-110 last night- so may have missed it)
Let me know if this has already been discussed, and I'll read back through. (I read pages 60-110 last night- so may have missed it)
Thanks, Bud!
Now I see now what you mean .. yikes, the first photo is kinda off-putting, but the second is truly stunning.. and I guess the reflections are fleeting for the most part anyway
I guess having the anti-reflective treatment done ( if affordable) will stop this artifact permanently
Now I see now what you mean .. yikes, the first photo is kinda off-putting, but the second is truly stunning.. and I guess the reflections are fleeting for the most part anyway
I guess having the anti-reflective treatment done ( if affordable) will stop this artifact permanently
So no one answered my question about polarizing. What if an polarized element was placed between the primary lens (projector lens ) ans the rear prisms. This way the light from the projector is polarized...
That screen shot from CARS just rocks Bud, Ka-CHOW indeed!!!
Your right about the shaky hand with the other shots though 🙂
I tried to take shots of the reflections, but I don't get them as bad or close the main image as you have documented. My side reflection is at 90 degree to the screen so, on the side wall.
All the dimensions are listed on my diagram. The Aussiemorphic Lens is 200mm (wide) x 200mm (deep) x 175mm (high) made from 16mm MDF and the angle is 45 degrees so that cut away section is 80mm on both sides...
The two prisms are 170mm (HYP) x 140mm at about 15 degrees...
Mark
That screen shot from CARS just rocks Bud, Ka-CHOW indeed!!!
Your right about the shaky hand with the other shots though 🙂
I tried to take shots of the reflections, but I don't get them as bad or close the main image as you have documented. My side reflection is at 90 degree to the screen so, on the side wall.
All the dimensions are listed on my diagram. The Aussiemorphic Lens is 200mm (wide) x 200mm (deep) x 175mm (high) made from 16mm MDF and the angle is 45 degrees so that cut away section is 80mm on both sides...
The two prisms are 170mm (HYP) x 140mm at about 15 degrees...
Mark
Would you loose light output going through a polarizer? I did a quick search on edmundoptics.com and it looks like the polarizing glass and film are a grey color. I also spoke to a photographer friend here at work and he said you loose 2 F-stops using a polarizing filter. What that equates to pj lumens I don't know.
I'm going to see if I can borrow a photography polarizing lens for the weekend and give it a try.
Andy
I'm going to see if I can borrow a photography polarizing lens for the weekend and give it a try.
Andy
I guess you will lose some light output, but with 1400 ansi lumens, I can affort too 🙂
Before this lens project, I actually placed a peice of 10% tint infront of the lens to give better blacks from the LCD. The whites drop off, but the blacks were better.
I am willing to give it a try. Where would I get one?
Mark
Before this lens project, I actually placed a peice of 10% tint infront of the lens to give better blacks from the LCD. The whites drop off, but the blacks were better.
I am willing to give it a try. Where would I get one?
Mark
Yeah, sure brag about your lumens 😉
But I only have 1100 lumens 🙄
I was thinking the same thing about the better blacks. It might be the same as putting on an ND filter. Anyways, you can get polarizing filters at any good photography store like Ritz Camera (do you have Ritz in Aussie land?)
Andy
But I only have 1100 lumens 🙄
I was thinking the same thing about the better blacks. It might be the same as putting on an ND filter. Anyways, you can get polarizing filters at any good photography store like Ritz Camera (do you have Ritz in Aussie land?)
Andy
Bud that Cars screen shot is amazing! Looking forward to Sunday, gonna bring the family! Also have to show you another way to post screen attachments 🙂
Putting a polarizer anywhere but at the end may not work so well, unless it is just before the last prism. I don't see why you would put it anywhere but after all the prisms. Polarizing the light before it goes in the prisms or lens is not usefull. Don't forget the light coming out of an LCD projector is already polarized. Once it bounces off the prism face, that light is no longer polarized and will be causing the problems. I am not sure exactly what you mean though, so maybe if you explained it better I would understand what effect it would have. It is the bouncing back and forth off the prism faces that causes you to need a polarizer in the end.
Anyhow, until somebody tries it, we won't know. I will look around for places that may carry a peice of polarized glass.
Anyhow, until somebody tries it, we won't know. I will look around for places that may carry a peice of polarized glass.
Ok thanks for the explaination. I guess the "green streaking" is just something I will have to live with...
In regards to the ND filters, is that what that clip in thing that came with my first projector is? The lastest one has this as an electric switch in / switch out device. It makes the image look pinkish brown which SONY claims is correct as D6500K - NOT!!! GREY is equal amounts of RGB, not pushing Red levels to the extreme...
Mark
In regards to the ND filters, is that what that clip in thing that came with my first projector is? The lastest one has this as an electric switch in / switch out device. It makes the image look pinkish brown which SONY claims is correct as D6500K - NOT!!! GREY is equal amounts of RGB, not pushing Red levels to the extreme...
Mark
Polarizers
The DIY projector community at LumenLab has been looking into polarizing films, as these are a part of LCD monitors which can become damaged during certain stripping operations. This thread has a rundown of types of polarization films and sources with pricing information. That info may be helpful here for those looking to experiment.
Link
The DIY projector community at LumenLab has been looking into polarizing films, as these are a part of LCD monitors which can become damaged during certain stripping operations. This thread has a rundown of types of polarization films and sources with pricing information. That info may be helpful here for those looking to experiment.
Link
andy238 said:
An externally hosted image should be here but it was not working when we last tested it.
Did anyone notice that this is actually an anamorphic lens?
Mark
Ya, but they are TINY in size. Too small for our need as lenses. I looked at that a while back since I 'm on their mailing list.
BTW, just replaced the housing & the CARS credits are still NASTY. Oh well, such is life. No one really watches the credits anyways...
Hey Mark, have YOU tried the credits? Let's see some screen shots...i'm going to try to take a few more today(have my tripod out from the wedding I went to yesterday).
Bud
BTW, just replaced the housing & the CARS credits are still NASTY. Oh well, such is life. No one really watches the credits anyways...
Hey Mark, have YOU tried the credits? Let's see some screen shots...i'm going to try to take a few more today(have my tripod out from the wedding I went to yesterday).
Bud
Mark Techer said:
No Mark...the END scrolling credits...let's see those ones. I went back to my original housing but already had modified it like yours. Going to build another one without the mod, should help the ghosting.
Trial & error.
Bud
Mark Techer said:
Yeah, I was all excited about them until I read the size 😀
I initially hoped that Edmunds would have prisms like the trophy ones. I was surprised that they really don't have anything useful for our purpose here.
Well, I borrowed a photography polarizing filter for the weekend. I tried with my AE900 and really didn't see an improvement. Any stray glare didn't really go away. It just got dimmer because of the light loss through the filter. I tried in front of pj lens, in-between prisms, and after prisms. No luck. 🙁
The light loss didn't make me a big fan of this filter either.
I noticed in the link p_su posted they mentioned circular vs. linear polarizing. I think this was a circular polarizing filter. That might be something to factor in my results.
I did see the polarizing film mentioned on the Lumens forum on the Edmunds website. Anybody wanna give that a try?
Bud Bray said:
Screen shots from the end credits. Most of these are not paused images...
...And we're looking for?
Mark