I am new to this community and project. I have a big concern that I want to bring up before I jump into buying parts and designing inclosures. I am 18, go to college and live at my parents house. If I were to use my projector in my room I would not be able to project a 110 inch picture...I could probably do 70 - 80". But I would like to have my projector set up so I could make the picture bigger/lesser in size without moving the projector. So if i wanted a 80 inch projection in my bedroom, i could place it in the back of the room, and simply modify monitor settings without worrying about moving closer to the projected wall to make the picture smaller. I know i am rambling, but I am just trying to let everyone get the picture of my particular situation. So basicaly what is the best way to adjust the screen size, and how efficient/usefull is it? Please post any suggestions/comments. I greatly appreciate all of the help in advance.
Sincerely,
-Kyle
Full Version: Best Way To Adjust screen size w/out moving projector
only thing that comes to mind is a program called powerstrip either that or a zoom lens but i dont believe there is one big enough for a 15"+ projectors
Will adjusting the height/width on the lcd manually not work?
-Kyle
-Kyle
QUOTE (Kyle @ Jan 14 2006, 03:57 AM) 
I am new to this community and project. I have a big concern that I want to bring up before I jump into buying parts and designing inclosures. I am 18, go to college and live at my parents house. If I were to use my projector in my room I would not be able to project a 110 inch picture...I could probably do 70 - 80". But I would like to have my projector set up so I could make the picture bigger/lesser in size without moving the projector. So if i wanted a 80 inch projection in my bedroom, i could place it in the back of the room, and simply modify monitor settings without worrying about moving closer to the projected wall to make the picture smaller. I know i am rambling, but I am just trying to let everyone get the picture of my particular situation. So basicaly what is the best way to adjust the screen size, and how efficient/usefull is it? Please post any suggestions/comments. I greatly appreciate all of the help in advance.
Sincerely,
-Kyle
Sincerely,
-Kyle
look up Supraguys' new build..he is doing something like that by building the lcd(not the fresnels) onto a moveable sled... by moving the lcd itself the size of the projection will change... I can see if you put the lcd on a sled with bolts and wingnuts sticking ooutside the box, you could move it without having to open the box...not as elegant as powerstrip perhaps, but your resolution wouldn't have to change then
QUOTE
look up Supraguys' new build..he is doing something like that by building the lcd(not the fresnels) onto a moveable sled... by moving the lcd itself the size of the projection will change... I can see if you put the lcd on a sled with bolts and wingnuts sticking ooutside the box, you could move it without having to open the box...not as elegant as powerstrip perhaps, but your resolution wouldn't have to change then
I think you will find that Supra’s design doesn’t change the image size. In his design instead of adjusting the triplet to focus the image, the LCD is adjusted.
QUOTE
Will adjusting the height/width on the lcd manually not work?
-Kyle
-Kyle
If your LCD has this feature then yes it will work but at the cost of resolution. Power strip maybe able to do this as well along with the limited resolution. The only way I can think of changing screen size is by using a smaller LCD, using a (edit)
DJ
QUOTE (DAZZZLA @ Jan 14 2006, 08:41 AM)
I think you will find that Supra’s design doesn’t change the image size. In his design instead of adjusting the triplet to focus the image, the LCD is adjusted.
If your LCD has this feature then yes it will work but at the cost of resolution. Power strip maybe able to do this as well along with the limited resolution. The only way I can think of changing screen size is by using a smaller LCD, using a shorter focal length triplet and fresnel set or physically moving the projector closer to the screen.
DJ
If your LCD has this feature then yes it will work but at the cost of resolution. Power strip maybe able to do this as well along with the limited resolution. The only way I can think of changing screen size is by using a smaller LCD, using a shorter focal length triplet and fresnel set or physically moving the projector closer to the screen.
DJ
no, I asked him and his image size will vary from 67" to 110"(as I remember it)...post #10...
found it..did I misunderstand what he was saying?
"I was going to plan on about 100mm length of travel, so that the triplet to LCD distance could vary between about 525mm or so to about 625mm. This should give it a focal range to throw from 8' 3" (67" screen) to a maximum of about 30' (More than I'll ever use!) which results in an almost 300 screen. I'm planning on about a 12' throw, which gets me close to my original screen size of 105"
hmmmm....rereading it and thinking about it, maybe I did misunderstand him...sigh... yep I'm pretty sure I did..never mind... sorry, too early in the morning here..
this is just so that it will be able to focus regardless of where the PJ is placed. BUT, he would still have to move the box in order to get a significant difference in image size!
the current setup we use does NOT allow for us to change the image size without moving the PJ box AND keep it in focus.
the current setup we use does NOT allow for us to change the image size without moving the PJ box AND keep it in focus.
How about the varifocal lens for the smaller LCD panel? this would give you the experience of a first build. I think it will zoom.
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