New Foot Lambert Calculator - Page 3

Amazing,that's the best PJ calc ever....
THANKS,Tom

...Hope some people enjoy this program, I put lots of work into this the past 1.5 months...

The Lens Shift Operation seems to work better today.

From someone who has dabbled in programming, it's obvious you have put a lot of work into this Calculator. Thank you.

So if I used this projector in my theater, I would only have 7fl at 2k hours on low lamp mode? Even at high lamp mode it's only 9fl. That's not bright enough right?

Attachment 226441

All lamps age differently, but you can't really expect to get all that much past 2k hours and not have to use near a brightest mode. Many projectors won't even make it to 2000 hours on the bulb, some people can get 3000-4000, some change the lamp around 1500-2500, just depends how you run it. You could always do a little more gain like an HP 2.4 gain screen (which really gives you around 2.0 gain). I always preferred HP screens with a projector that has V-SHIFT, because it maximizes bulb life.

I would only base it on 500-1000 hours. If you want a longer lasting bulb, you might want to look into a Mitsubishi projector, although the Epson's do have good warranties and since you need lens shift this would be a tougher mounting job for you.

Looks like the JVC RS45 would provide better FL at 2k hours.

Attachment 226459

Coderguy - thanks for all your effort in putting together this great tool. As a newbie, who is still trying to make a decision on his first projector, I am confused about the scale showing throw distance versus zoom. I thought that the closer to the screen you mount the projector the lower the zoom ratio you would use. Stated differently, if you mount the projector at 10 feet from the screen, I thought that would require the lens be set to the "wider angle" end of the zoom, versus mounting at 15 feet. However, your calculator seems to show the exact opposite. Namely, the closer I move the projector to the screen, the higher the zoom setting to be used. For reference, I was looking at the specs on the Epson 5010. Any clarification would be appreciated.

Thanks coderguy for creating this..it's quite helpful. One question, if you drag the slider up and down to adjust the pole length, it seems it would accept any value (i.e. infinite lens shift capability for something like a w6000, for example). I read you're still working through the lens shift calcs/manuals, but where would I enter what the specific lens shift range is for the PJ? Also, the w6000 manual is all of ~20 pages long and I didn't see the range in there either. Any suggestions?

@akrauss
The closer you are to the minimum throw ratio, the more zoom you need.

New Minor Release with Bug Fixes

Version Beta 0.21 (prev. version was 0.2)

*2.35 Offset calculations now work correctly across the board

*Switching between 2.35 and 16:9 mode automatically corrects the offset based on overshooting method
(really the only way you can display 2.35 content on a 2.35 screen with a 16:9 lens)

*Epson 3010 and 5010 Lumen Specifications have been Updated

*Benq w7000 and Acer 9500bd now added to calculator (20+ other projectors being added soon!)

*Rounding bugs fixed and Throw ratios are no longer shown 0.01 to 0.02 off

*Throw ratios now reverted back to MFR specs for most PJ's since rounding bug has been addressed

*Anamorphic Lens calculations temporarily removed until Beta 03 to address further issues here

That is an amazingly powerful tool you made there. I now know that my screen should be 1.1-1.6 gain so I'm going to work on creating a 1.3-1.4 gain screen to be optimal

First off - Thank you. Looks like a great tool.

However, I'm a bit confused by the throw distance/zoom slider. I am considering the Sony HW30 and and a 126" 16:9 screen. I would most likely need to mount it about at 17.5', so if I start with those #s, it looks like I would need to keep it in HIGH mode to get the best output. My question is, if I keep it at 17.5' and use the Zoom on the projector, will I get better light output, i.e. zoom it to 1.5 so I can use LOW mode? Or do I only get better output by moving the projector forward?

The throw/zoom slider is re-positioning the projector, hence you must set it to the distance that you have the projector mounted. If you can mount the projector closer (hence a different zoom position), then yes you will make it a little brighter.

You would get about 8 fL in low lamp and 11 fL in high, that is TOO dim. You need at least 1.5 gain for this even if starting in LAMP HIGH, and I would really recommend 1.8 to 2.4 gain would be optimal.

Now you can get it a little brighter by changing the projectors settings if you don't mind a slightly less accurate picture (like a dynamic mode), but each person has a different tolerance for this. The real problem with a less bright image is you will be hurting even more for brightness in 3D. For 2D, you will be ok in LAMP HIGH, but you need to start at 16-20 fL as a better target.

It appears that when I change the screen size, the projector resets to the middle of the zoom range. I can then move the slider left or right to see what the calculations would be for that particular distance, correct? Does the UP/DOWN distance affect anything. I played with the slider, but it doesn't appear to change anything.

As far as zoom, I was asking about the mechanical zoom on the projector itself, but it doesn't appear that's counted for here. My question remains, however, if I use the mechanical zoom on the projector do I get better light output?

New v022.0 - Minor Release with One MAJOR Bug Fix

**Fixed Vertical Lens Shift Calculations for some projectors that use center based offsets (like JVC and Sony)

**Version Beta 0.23 is almost done with new proejctors added to the list


------------------------------
OLD RELEASE HISTORY
---------------------------------
Previous Release (021) with Bug Fixes

*2.35 Offset calculations now work correctly across the board

*Switching between 2.35 and 16:9 mode automatically corrects the offset based on overshooting method
(really the only way you can display 2.35 content on a 2.35 screen with a 16:9 lens)

*Epson 3010 and 5010 Lumen Specifications have been Updated

*Benq w7000 and Acer 9500bd now added to calculator (20+ other projectors being added soon!)

*Rounding bugs fixed and Throw ratios are no longer shown 0.01 to 0.02 off

*Anamorphic Lens calculations temporarily removed until Beta 03 to address further issues here

Additional Adjustments - Beta Release 022.1

**Added the Acer h5360, the Optoma hd66, and the Panasonic ar100u to the calculator.
---I still need to review the manuals to make sure I have the data correct

**Very slightly changed some of the color scheme of the form

**Fixed Specs so that I can now start finishing entering all the stats of each projector for the stats tab

**Aesthetic change that does not affect calculations, but when changing to high ceilings like 15+ feet, the projector is now shown at an accurate physical position in relation to the grid

**8+ fL instead of 10+ fL is now shown as being bright enough for 3D (will show green unless going under 8 fL in the 3D calc)

Am I missing something or does the "lens offset" percentage in Advanced Modifiers have no effect on other calculations? I can't seem to find any change no matter what is entered in the offset box. Just curious.

The lens offset only applies to non-center based offset projectors like the Benq w1200. Try that one and then change it, and then you should see it change.

Im getting a blank page at the URL. is it dead?

Works for me. Try again.

http://www.eliteprojectorcalculator.com/

Kal

Thanks. I was using the link on the first post which is outdated an dead.