Calculators

[marc]

Hi All,

 

Sorry if this is covered before, but searching was not successful and I could not find what I was after.

 

I am after a lens throw calculator for primarily Barco projectors, but ultimately all projectors, is there some where a bit of software for download that does what I want. I don't really get on with Barco's web site, and can not find what I'm after there, and google was great for every other maker of projector!

 

I know there is a sum that can be done to work it out manually so to speak but I can not remember this either!

 

Any help much appreciated,

 

Mk

[blamelewis]

Hey,

 

try this:

 

Projector Central

 

it's very good site and the link is to an online throw/size calculator for many models of projector.

 

Hope that helps

 

Tim

[Paulo]

I am after a lens throw calculator for primarily Barco projectors, but ultimately all projectors...

 

I may have the Barco 6300 calcs as I have been looking to sell a pair of them! Let me know if thats any good to you.

 

Paulo

[pumphouse]

Here is a link to the Barco lens calculator program (from their web site):

 

 

Barco lens calculator

 

Fundamentally, this is really easy for all manufacturers if you can find out the zoom ratio (or focal ratio if not a zoom) of the available lenses.

 

The ratios given are always the relation between the image width and the throw distance. Eg a 2.5:1 lens will give an image 2m wide at 5m away. The simple formula is image width x lens ratio = throw distance. You can manipulate this to find out what image you can have with a given lens at a given throw, or what lens you need to achieve a given image size at a given throw etc.

 

Hope this helps.

 

Jason

[marc]

Hi,

 

Thats the one, just what I was after, just could not remember it! and there are only so many hit pages I can go through with google before loosing the will to live!

 

Ta,

 

Mk