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# Runco Rainier lens on other projectors

I'm looking for some advice on the use of an anamorphic lens. I've found a used Runco Rainier lens on Videogon made by Schneider. Listing is here:
Listing

I'm wondering if this lens will work on other projectors. If so, how do I figure out what the throw ratio would be.
It is made by Schneider, so why would it not? It looks like the Cine-Digitar.
Would you know how to figure out the throw ratio? Is it the same as for the 16:9 I assume. I know that's a rookie question, but I have not done CIH before.
I'm guessing you need a long throw of around 2.20:1 with that lens.

Throw Ratio is distance between projector's lens and screen divided by the native 16:9 image width.
I think my throw is long enough. Here's my math given what you said.

The screen I have is 105" x 44.68" in 2.35 mode. My throw distance is 182". So I did the math as:

44.68 * 16/9 = 79.43" (16x9 width)
182/79.43 = 2.29

If I did the math right, that's just over 2.2 so it should work. That would be great because other posts on this site say the Schneider lens is pretty good.
Quote:
Originally Posted by wkumar

I'm looking for some advice on the use of an anamorphic lens. I've found a used Runco Rainier lens on Videogon made by Schneider. Listing is here:
Listing

I'm wondering if this lens will work on other projectors. If so, how do I figure out what the throw ratio would be.

First you need to tell us the projector type. The smallest Schneider will work with an image panel size of .95" provided the primary lens is not recessed and the throw ratio is over 2:1 or so. I would recommend asking the seller the diameter of the front of the lens and compare it to Schneiderâ€™s standard products. They also have a compatibility list on their website that might list your projector. When sizing a lens itâ€™s all about the maximum beam size that will fit through the lens. The closer the anamorphic lens is to the primary lens and the further away the projector is from the viewing screen (longer throw) reduces the required lens size.
Makes sense. I'm trying to get the diameter numbers now and will look into the website info.
Quote:
 Originally Posted by wkumar I'm looking for some advice on the use of an anamorphic lens. I've found a used Runco Rainier lens on Videogon made by Schneider. Listing is here:Listing I'm wondering if this lens will work on other projectors. If so, how do I figure out what the throw ratio would be.
Throw ratio is projection distance divided by 16:9 image width. You'll need a longer TR with this lens because of its smaller size.
I've got the dimensions. The lens is 3.85" in diameter and 3.25" long. This fits the Schneider Cine-Digitar 1.33 lens. Also, it looks exactly like it, except it says Runco.

I looked up the throw ratio tables and it seems that they quote things off the 2.35 screen width for some reason. It ranges from 1.2 to 1.76. Converting that to 16:9 screen width ratios I get 1.6 to 2.34. It seems the range is a function of chip size, smaller chips can be at the 1.6 whereas the 1" chip would be at 2.34.

I have not bought the projector as yet. So if you were to match a projector to this lens, what would you look for? Currently I'm considering the Infocus SP8602, Vivitek H5080 or Digital Projection M-Vision 260 HC.
Quote:
Originally Posted by wkumar

I've got the dimensions. The lens is 3.85" in diameter and 3.25" long. This fits the Schneider Cine-Digitar 1.33 lens. Also, it looks exactly like it, except it says Runco.

Re-badging or "badge engineering" happens allot. I am almost willing to bet they are the same lens.

Quote:
I looked up the throw ratio tables and it seems that they quote things off the 2.35 screen width for some reason. It ranges from 1.2 to 1.76. Converting that to 16:9 screen width ratios I get 1.6 to 2.34. It seems the range is a function of chip size, smaller chips can be at the 1.6 whereas the 1" chip would be at 2.34.

A DLP with a 0.9" chip would require the longer throw.

Quote:
I have not bought the projector as yet. So if you were to match a projector to this lens, what would you look for? Currently I'm considering the Infocus SP8602, Vivitek H5080 or Digital Projection M-Vision 260 HC.

Just make sure it scales for both VS and HS and has decent calibration settings.
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