First you have some obstacles. A 30-40' diagonal at 40-50' throw is a very short throw distance...that will limit your choices. Secondly, forget running it when there is outside ambient light...it won't work. You pretty much need the sun completely set (I have experience with this). Also, your wall is going to limit how good the image is...you could put a $100k projector on it...but painted brick will never yield a great result.

 

Projecting on a wall


Your guess looks good at 5k to 6.5k lumens, but for outdoor purposes the brighter the better. Most vendors list what they offer. Your best bet is to call and ask them as to suitability and price. Tell them what images you wish to project. Some images don't require good blacks.


Picture size: for large images use measurement left to right. Diagonal measurement originates with marketers of small TV sets.

 

What sort of gathering is this?


I'd like to see picts after you've decided the equipment/etc.

Before, set-up, testing, and during.

Cool to see.


btw JTrinity7, are there 2 threads on this subject now??
I need to project on a 3 story building!!! What specs do I need

 

Not sure why you started a new thread, but exactly how big is your budget? If it is under $20k, then you are looking for a used pj. Curt Palme has a line on some used Sanyos that may be good enough for you.

 

What sort of image?


If you want a computer image that says Merry Christmas and Happy New Year, all you need is adequate brightness.


If you want to project a movie from DVD or BD, ask studio first and obtain permission.


Movies look better on a smoothly plastered surface and for this purpose you might get an estimate before purchase of projector.


If you want to try plastering yourself, go to Home Depot and tell them you want to plaster a wall. If this is your first plaster job, try a small portion, maybe 6 ft tall by 10 ft wide. From this experience, you can determine if you can handle a larger job and extimate how long you may need. You need time estimate to rent scafolding and come up with reasonable cost estimate.

 

Thanks guys,


Yes it is most definitely going to have to be a used projector, from looking around, it seems most companies that do outdoor projection, use 10 -12k lumen projectors. Video is not what I'm after, only static images.


And I apologize for the new thread, I wasn't getting anymore replies and wanted some input so I posted again.