130" Wide 2:35-What Size Will !6:9 BE?

[Big Picture]

Is there a calculator available somewhere that will show the size of a 16:9 image inside a 2:35 screen?

Thank you.

[Kelvin1965S]

I don't know about any calculators, but here goes:

130" divided by 2.35 will give you the height of the screen, in this case 55.3". Divide this by 9 then mulitply by 16 to get the 16:9 width, which is 98.3" wide. Bear in mind that many films are in 1.85:1 rather than the 16:9 (1.78:1) aspect ratio, which tend to be TV broadcasts.

Or you could just divide the 2.35 width by 1.33 and this will be close enough; 130/1.33= 97.7". This is effectively what adding a lens will do to your 16:9 image by making it 1.33 times wider (though some lenses do allow you adjust the horizontal stretch if required).

[caesar1]

Originally Posted by Kelvin1965S

I don't know about any calculators, but here goes:

130" divided by 2.35 will give you the height of the screen, in this case 55.3". Divide this by 9 then mulitply by 16 to get the 16:9 width, which is 98.3" wide. Bear in mind that many films are in 1.85:1 rather than the 16:9 (1.78:1) aspect ratio, which tend to be TV broadcasts.

Or you could just divide the 2.35 width by 1.33 and this will be close enough; 130/1.33= 97.7". This is effectively what adding a lens will do to your 16:9 image by making it 1.33 times wider (though some lenses do allow you adjust the horizontal stretch if required).

How do you get the diagonal size? Typically we are used to diagonal measurements (at least in the states). So if I have a 114 inch diag 16 x 9 PJ screen -- I know that its 4 times the size of a 57 inch flat screen.

[elmalloc]

A squared + B squared = C squared, where A is the height, B is the Width, C is the diagonal.

[frvega2000]

Originally Posted by elmalloc

A squared + B squared = C squared, where A is the height, B is the Width, C is the diagonal.

If your familiar with Microsoft Excel here is the formula to get the diagonal:

=SQRT((A)^2+(B)^2)

where, as elmalloc stated, A is the height, B is the Width. Simply copy/paste into a cell in Excel and plug in the A and B values.

[wiatrak]

Originally Posted by Big Picture

Is there a calculator available somewhere that will show the size of a 16:9 image inside a 2:35 screen?

Thank you.

If you don't have installed on your PC Excell (MS Office) or Open Office, you might use Google Docs (online spread sheet).

Write file on disc and unzip it.

[Big Picture]

Actually I found today that the projectorcentral.com screen calculator answers my questions.

Thanks all for the input.

[CAVX]

Originally Posted by Big Picture

Is there a calculator available somewhere that will show the size of a 16:9 image inside a 2:35 screen?

Thank you.

The easiest way is to simply take the height and multiply that by 1.78 or take the screen's width and times that by 0.75.

[HD in Ohio]

One of the nicer calculators is on Carada's site: http://www.carada.com/MasqueradeCIHCalculator.aspx

[wiatrak]

Nice, but with some bugs... Check the numbers on screen dump:

[Logic_BomB]

Originally Posted by Big Picture

Actually I found today that the projectorcentral.com screen calculator answers my questions.

Thanks all for the input.

This is just me but I'd prefer to do my own math than use a tool that auto-calculates everything whenever possible. This isn't hard math by any stretch. Simple division/multiplication and then if you want diagonal it's just our good friend Pythagoras.

And once you learn how the math works you can repeat the answers anytime you like without jumping online.

[elmalloc]

The technological world is moving faster than humans can keep up with. Most technological advances are to make man lazier. Someday we will never do addition in our head again.

[floridapoolboy]

Drop by MIT sometime and see how many students are doing math "in their heads", LOL!

[elmalloc]

That proves my point. I graduated from case western (was competitive with MIT for engineering at the time), though we weren't allowed to use calculators for our calculus classes - lol.

[floridapoolboy]

I remember my first T.I. calculator, red LEDs and all. That thing was such a power hog we needed to bring power supplies to class in case the batteries died during a test! My older brother went to MIT, he used a slide rule. Seems prehistoric now!

Edit: Back on topic, Caradas site makes the calculations easy..!

[CAVX]

Originally Posted by wiatrak

Nice, but with some bugs... Check the numbers on screen dump:

Why, because its metric

[wiatrak]

Standard units (not for me BTW) also are buggy...
Screen_2.jpg
If you not toggle between standard and metric, the calculator seems work fine, but if you once change units then accuracy of numbers go away...

[elmalloc]

carada calculator not go big enough

[wiatrak]

That's why I use my own calc. sheet...

[CAVX]

Originally Posted by elmalloc

carada calculator not go big enough

Agreed. 90cm? My screen is bigger than that

[Green Chemist]

103.8" as 16x9.

I love www.displaywars.com.

[elmalloc]

When I think of centimeter I think of millimeter. Who measures screen by such minute size. Bigger is better

[tbase1]

It would great to have a cal. that you can pick your screen, projector, and lens. Now that would be cats you no what. CAVX..... what say you?

[CAVX]

Originally Posted by elmalloc

When I think of centimeter I think of millimeter. Who measures screen by such minute size. Bigger is better

I do actually when I quote a screen size for someone as three thousand, five hundred millimeters sounds more impressive than three and half meters even though it is the same.

[CAVX]

Originally Posted by tbase1

It would great to have a cal. that you can pick your screen, projector, and lens. Now that would be cats you no what. CAVX..... what say you?

This could be done for the lenses and screens. The projectors might pose a challenge as there is so many new models coming out and specs change much more frequently with electronic than anything else.

At this time, there are just 7 CA corrected lense brands (4 prismatic and 3 cylindrcial) and screens are really only differentiated by the gains of their fabrics. Naturally their size will also affect image brightness and would also be needed to be accounted for.

Very do-able

[adude]

http://en.wikipedia.org/wiki/Pythagorean_theorem

Here it is. The complicated version of the above discussion. But they teach this in High school. Seemed easy at that time though.

[CAVX]

Originally Posted by adude

http://en.wikipedia.org/wiki/Pythagorean_theorem
Seemed easy at that time though.

Finding C is easy. The trick is finding B when you only know A and don't have C.

[wiatrak]

Oooops!
It seems my own calc has bug, I don't proper check it after adding changeable AR, so edit earlier posts...

[elmalloc]

Originally Posted by CAVX

I do actually when I quote a screen size for someone as three thousand, five hundred millimeters sounds more impressive than three and half meters even though it is the same.

HAHA

[ewitte]

Originally Posted by elmalloc

That proves my point. I graduated from case western (was competitive with MIT for engineering at the time), though we weren't allowed to use calculators for our calculus classes - lol.

Calculator not necessary but got to the point where a lof the advanced stuff was in my head but basic stuff needed at least to be done on paper. Wish I had applied myself more in HS. Always put myself in the extremely hard classes but never studied, rarely did homework, etc. I guess given that it was still pretty good to get B's in most AP classes or even in college just of of listening in class. One of my later physics classes (like 6 people in a graduating class of around 500-600) had someone in it that got a full MIT scholarship.