I'd like to start a thread about Lenses that are acceptable for DIY LCD Projection, where they can be sourced and how suitible they are for LCD Projection, for some reason there isnt alot of information on these forums about where to source a decent lense, the only thing I could find is optiks kit in germany, which is a little out of my reach and shipping will be insane, another place was something that Ace3000_1 posted.
FUJINON COPY LENS, 240MM FL from a suplus store.
Now, how suitable are these? What is the maximum LCD size that you can use these with?>
My setup current is a 12" TopVision LCD screen(8x6 native, 1280x1024 compressed) ontop of a borrowed 3M (OLD) OHP, it produces an acceptable result, but im looking at a 500watt halogen solution, so i need a lens, condensor and possibly Frensell.
So if anyone could post any information relating to suitible lenses, condensors and frensells then please do, living in New Zealand its very hard to get thing here cheaply otherwise I would just purchuse the optiks kit, however frieght will be 30-40$ US which is almost as much as the kit itself and I cant justify that.
FUJINON COPY LENS, 240MM FL from a suplus store.
Now, how suitable are these? What is the maximum LCD size that you can use these with?>
My setup current is a 12" TopVision LCD screen(8x6 native, 1280x1024 compressed) ontop of a borrowed 3M (OLD) OHP, it produces an acceptable result, but im looking at a 500watt halogen solution, so i need a lens, condensor and possibly Frensell.
So if anyone could post any information relating to suitible lenses, condensors and frensells then please do, living in New Zealand its very hard to get thing here cheaply otherwise I would just purchuse the optiks kit, however frieght will be 30-40$ US which is almost as much as the kit itself and I cant justify that.
Max size for that copy lens is 10" or so I have heard. I had one but my screen was too big so I sold it
What size screen did you have? thats a damn pain as they look like a nice cheap soluation, and i believe ace3000_1 stands by them.
Whats the best lenses to purchuse from http://www.surplusshed.com/ for a 12" LCD and a standard setup.
Whats the minimum specs for a lense that will work with a 12" LCD.
Whats the minimum specs for a lense that will work with a 12" LCD.
Hi.
sorry for my poor english skill.
Find opaque projector lens. you can see movie under 40W*2 fluorescent light.
search e-bay frequently.
http://www.seodots.co.kr/silmul.html
sorry for my poor english skill.
Find opaque projector lens. you can see movie under 40W*2 fluorescent light.
search e-bay frequently.
http://www.seodots.co.kr/silmul.html
hi.
searching the internet has left me a bit confused.
what is 5.1 , 3.1, 4.5 (sometimes writen f4.5)
usually written around the eye of the projecion lens.
does it refer to how close the projector can be to the wall?
ca anyone explain it please?
searching the internet has left me a bit confused.
what is 5.1 , 3.1, 4.5 (sometimes writen f4.5)
usually written around the eye of the projecion lens.
does it refer to how close the projector can be to the wall?
ca anyone explain it please?
Hello gwark,
the numbers are ratio between the lens diameter and the focal length. They are called f/numbers, f/stop or lens speed, each increase in f/stop reduces the light by about half. They are not very useful by them self, you usually need the FL or diameter as well.
eg. 100mm diameter / 100mm FL = f/1
100mm diameter / 50mm FL= f/0.5
Do a search in google for lens speed or f stop
DJ
the numbers are ratio between the lens diameter and the focal length. They are called f/numbers, f/stop or lens speed, each increase in f/stop reduces the light by about half. They are not very useful by them self, you usually need the FL or diameter as well.
eg. 100mm diameter / 100mm FL = f/1
100mm diameter / 50mm FL= f/0.5
Do a search in google for lens speed or f stop
DJ
I dont think Ace has any Fuji copy lenses left i bought his last one but obviously confirm this with him first, and Surplus Shed are out of stock. You may want to email theo@lumenlab.com.au the Lumenlab agent in Australia, he has a shipment of the 1002 Projection Lens Triplet Lumenlab have on the site http://lumenlab.com/store/index.php coming in about 2 weeks. I would think these should be acceptable for your screen. Theo sells them for approx $AD44 plus shipping the freight charges shouldn't be as steep to N.Z as those you would incour for components from Germany of America.
Hope this is of some use for you.
Hope this is of some use for you.
hi everyone
diybuilergroup has got a lot of copy lenses in there stores check em out
http://diybuildergroup.com/store/optics/
diybuilergroup has got a lot of copy lenses in there stores check em out
http://diybuildergroup.com/store/optics/
How do you do it? I thought LCD's were transmissive... DLP's are reflective, so that might work.... am I in the right path?
Eastman Projection Anastigmat Lense F-45 10 In
I won this lens from ebay, it's 2 inches wide x 2 inches deep .
it is a darkroom lens, throws a nice sharp image, i have been testing it with my trial tv projector untill i get a good LCD.
would this lens be suitable for LCD projection please?
cheers
I won this lens from ebay, it's 2 inches wide x 2 inches deep .
it is a darkroom lens, throws a nice sharp image, i have been testing it with my trial tv projector untill i get a good LCD.
would this lens be suitable for LCD projection please?
cheers
hi.
sorry for my poor english skill.
- first..
F 130 means that lens's focal length is 130mm
- but if you see f2.5(or 1.083 or 4.5.....) that doesn't mean focal length. and doesn't mean f-stop(shutter speed).
- to calculate f, it needs some fomula(I don't know), but we can simply call like this
"lens brightness"
and f1.0 is ideal lens(no loss)
you can think just like this
f1.0 : on-coming(1.0), out-going(1.0)
f2.0 : on-coming(2.0), out-going(1.0)
f3.0 : on-coming(3.0), out-going(3.0)
...
- commonly.. opaque projector's lens is very large. and it has small 'f'.(f2.6 used in DP-30). those kind of lenses has some merits in DIY projector.
1. brighter than smaller lens. (transmits more light)
2. reduce loss from fresnel diffraction.
3. can use low diopter fresnel
4. if lens's diameter is nearly same to lcd's diagonal. you can remove 2nd fresnel(this reduce image contrast, sharpness)
thanks for reading.
sorry for my poor english skill.
- first..
F 130 means that lens's focal length is 130mm
- but if you see f2.5(or 1.083 or 4.5.....) that doesn't mean focal length. and doesn't mean f-stop(shutter speed).
- to calculate f, it needs some fomula(I don't know), but we can simply call like this
"lens brightness"
and f1.0 is ideal lens(no loss)
you can think just like this
f1.0 : on-coming(1.0), out-going(1.0)
f2.0 : on-coming(2.0), out-going(1.0)
f3.0 : on-coming(3.0), out-going(3.0)
...
- commonly.. opaque projector's lens is very large. and it has small 'f'.(f2.6 used in DP-30). those kind of lenses has some merits in DIY projector.
1. brighter than smaller lens. (transmits more light)
2. reduce loss from fresnel diffraction.
3. can use low diopter fresnel
4. if lens's diameter is nearly same to lcd's diagonal. you can remove 2nd fresnel(this reduce image contrast, sharpness)
thanks for reading.
(im gonna get me a triplet...save the hassles)
just a quick (newb) question:
Fujinon 4 1/2 (front?) projection TV lens.
has about a half inch focal length.
everyone i've asked (on a couple forums) told me this is no good.
however...
since it is 4inches, and the PS lcd is about the same, can it be placed right up against a PS1 lcd with a lamp behind the lcd?
thanks
just a quick (newb) question:
Fujinon 4 1/2 (front?) projection TV lens.
has about a half inch focal length.
everyone i've asked (on a couple forums) told me this is no good.
however...
since it is 4inches, and the PS lcd is about the same, can it be placed right up against a PS1 lcd with a lamp behind the lcd?
thanks
Hello gwark,
as long as the lcd is about the same size, or smaller than the lens, it might work. It all depends on how the lens was designed. Some rear projection lenses were designed to focus on the curved surface of a crt. You could only try, you would have to leave out the front fresnel ofcoarse.
DJ
as long as the lcd is about the same size, or smaller than the lens, it might work. It all depends on how the lens was designed. Some rear projection lenses were designed to focus on the curved surface of a crt. You could only try, you would have to leave out the front fresnel ofcoarse.
DJ
yea, a front fresnel would ruin the image. I have a delta4 lens, as far as Ive heard, its lower end than that fujinon, but even the delta4 projects nice from a 5" source. Lenses that are meant to be placed righ up to a curved tube - i never heard of those, those lenses usually have a space between themselves and the crt. I have a lens that was meant for a curved 13/14" crt, its 175mm in diameter, and is a triplet.
thanks for the replies 🙂
yes, i meant by 'right up against' the panel to mean about an inch away, same as the commercial crt tele that is supposed to be with it.
it's pretty much right up there compared to triplet method.
should be fun playing with it .... ill post results when i do.
although i imagine it will be having at least a month's layover in bloody customs...
...since when is a lens national security?
🙄 😀
yes, i meant by 'right up against' the panel to mean about an inch away, same as the commercial crt tele that is supposed to be with it.
it's pretty much right up there compared to triplet method.
should be fun playing with it .... ill post results when i do.
although i imagine it will be having at least a month's layover in bloody customs...
...since when is a lens national security? 🙄 😀
hi.
sorry for my poor english skill.
most projection lenses are coupled with liquid parts. that makes ultra short TCL at 7", 8", 9" CRT(total conjugate length : in LCD projection, Lamp->LCD->Screen)
i didn't seen fujinon lens,
but .. if it is liquid coupled lens, you can not use your lens.
thanks for reading.
sorry for my poor english skill.
most projection lenses are coupled with liquid parts. that makes ultra short TCL at 7", 8", 9" CRT(total conjugate length : in LCD projection, Lamp->LCD->Screen)
i didn't seen fujinon lens,
but .. if it is liquid coupled lens, you can not use your lens.
thanks for reading.
copy lens
http://www.surplusshed.com/pages/item/l3225.html
is it replacaple with fujinon 240mm copy lens? (I've lilliput 7")
http://www.surplusshed.com/pages/item/l3225.html
is it replacaple with fujinon 240mm copy lens? (I've lilliput 7")
Front lens diameter is 47mm, rear lens diameter of 40mm. Black-enameled aluminum barrel length of 80mm x 64mm diameter, 14-leaf adjustable iris from one notch above f/9 to one notch smaller than f/22, multi-element, with beautiful purpled coated optics.
Its nothing like it, just take a look at the clear lens diameter, on the fuji copy lens its 63mm, this one is 47mm. It will work sure but your in a high risk zone as its hard to find 250mm frensels for that lens, if you dont you will get side image distortion. You will also get light loss with this lens and it has an iris.
Trev🙂
- Status
- Not open for further replies.