Hello,
I was doing a search through http://www.surplusshed.com and found this zoom lens off of a video camera: http://www.surplusshed.com/pages/item/l3020p.html. I was wondering, or rather praying, that this lens assembly would be useful as a projection lens. Is there any way to tell if this lens would work, and if so, what the projected image size to LCD picture size ratio is in the range of. Or at least how big the image will be, roughly, given a distance away from the screen.
Thanx
Dwiel
I was doing a search through http://www.surplusshed.com and found this zoom lens off of a video camera: http://www.surplusshed.com/pages/item/l3020p.html. I was wondering, or rather praying, that this lens assembly would be useful as a projection lens. Is there any way to tell if this lens would work, and if so, what the projected image size to LCD picture size ratio is in the range of. Or at least how big the image will be, roughly, given a distance away from the screen.
Thanx
Dwiel
hi
i'm not an expert with this
the advantage is that (maybe) you can change the size of the screen using the zoom
but zoom eat more light due to the number of lenses
i'll try to use one on my project
i'm waiting for the part
for example at 4 meters from the wall you can have a 2 meter base image but you can also have a 0,5 meter image
it's a thing that must be tried because if it works it's easy to find
bye
i'm not an expert with this
the advantage is that (maybe) you can change the size of the screen using the zoom
but zoom eat more light due to the number of lenses
i'll try to use one on my project
i'm waiting for the part
for example at 4 meters from the wall you can have a 2 meter base image but you can also have a 0,5 meter image
it's a thing that must be tried because if it works it's easy to find
bye
hi
i was talking about camera zoom (24*36)
video camera have ccd captor and are too small
it's true
bye
i was talking about camera zoom (24*36)
video camera have ccd captor and are too small
it's true
bye
i don't think that such lenses are economical for us. besides the supposed short focal length and so on...
it sux that we have to get our projection lenses from ohps or other devices like that. it would be much cooler if someone with insight on optics could tell us how to assemble our own projection lense setup. then we only would have to look for the lenses, and build them together. a zoom lense would be within our grasp! hehee
it sux that we have to get our projection lenses from ohps or other devices like that. it would be much cooler if someone with insight on optics could tell us how to assemble our own projection lense setup. then we only would have to look for the lenses, and build them together. a zoom lense would be within our grasp! hehee
nitemare
you're right
i think people who own a comercial projectror can help us with pics
i saw some but never had the luck to dismantle'em
it does not seem to be very complicated
seems to have only 2 lenses
one for the screen size and one for the focus;
am i right
can anyone help us?
is there a thread here about that?
it's not hard to build a remote control to adjust these lenses
bye it's late and i'm busy after a hard night
thanx to all the people who help us
(remember, i'm only interested in compact video projector so please do not post replies with ohp solution(thanx))
you're right
i think people who own a comercial projectror can help us with pics
i saw some but never had the luck to dismantle'em
it does not seem to be very complicated
seems to have only 2 lenses
one for the screen size and one for the focus;
am i right
can anyone help us?
is there a thread here about that?
it's not hard to build a remote control to adjust these lenses
bye it's late and i'm busy after a hard night
thanx to all the people who help us
(remember, i'm only interested in compact video projector so please do not post replies with ohp solution(thanx))
"(remember, i'm only interested in compact video projector so please do not post replies with ohp solution(thanx))" ????
is this a joke? "compact" is a luxury far away from our cause here on DIY beamerz....
most of the DIY stuff is using ohp optics, and even bigger because of the large light sources...
and remote controling a zoom lense is so far from my concern right now. ho often do i want to change the size of my screen? once in a while mabe at the beginning but once it is perfectly set. i won't touch that again...
is this a joke? "compact" is a luxury far away from our cause here on DIY beamerz....
most of the DIY stuff is using ohp optics, and even bigger because of the large light sources...
and remote controling a zoom lense is so far from my concern right now. ho often do i want to change the size of my screen? once in a while mabe at the beginning but once it is perfectly set. i won't touch that again...
So it will for sure not work?
Or will it not be as bright as possible alternatives?
It seems everyone has there own opinions on this 🙂
Or will it not be as bright as possible alternatives?
It seems everyone has there own opinions on this 🙂
don't worry nitemare
i only plan to build mine with a 7" monitor hi res(that s what i call compact)
and yes some jokes sometime
bye
i only plan to build mine with a 7" monitor hi res(that s what i call compact)
and yes some jokes sometime
bye
hmm so the expensive route...
such small lcd with decent resollution are costy. but what light source would you use on that? i can't think of HQI and "compact" together. it wouldn't fit thru smaller lenses than those from ohps
such small lcd with decent resollution are costy. but what light source would you use on that? i can't think of HQI and "compact" together. it wouldn't fit thru smaller lenses than those from ohps
i found a 800*480 7" for 170$
waiting for it and the fresnel
i think i'll try with cold 200 w halogen bulbs
i'll see when i'll get all the stuff and post a thread with my job or put all this s$$t in the trashcan😱
bye
waiting for it and the fresnel
i think i'll try with cold 200 w halogen bulbs
i'll see when i'll get all the stuff and post a thread with my job or put all this s$$t in the trashcan😱
bye
i definitely live on the wrong continent...
that's a splendid price! heh
but with alle the lighting and optics you are going to go a lesser explored way. and i thought my viewsonic witha 250W HQI setup is the high road.
that's a splendid price! heh
but with alle the lighting and optics you are going to go a lesser explored way. and i thought my viewsonic witha 250W HQI setup is the high road.
too big for me
i live in reunion island indian ocean near madagascar
things atre very hard to find ,i must order everythings
bye
i live in reunion island indian ocean near madagascar
things atre very hard to find ,i must order everythings
bye
http://www.diyaudio.com/forums/show...5&pagenumber=93
nitemare
go to the thread above page 90 and take a look on what i'm planning to build( trev 's projo )
bye
nitemare
go to the thread above page 90 and take a look on what i'm planning to build( trev 's projo )
bye
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