Sim2 Lumis Owners Thread - Page 62

Yes, that's the one. The cover will slide a little to the left as pictured.
Don't worry about the housing, it's mostly plastic.
You could drop one of the three screws holding it in place into the projector as you are removing them though.

hi jeff,

I think you are right, that´s the lamp door!
don´t forget to reset the lamp timer after replacing the lamp!

regards
m

That's correct Jeff, and the lamp should not be that difficult to remove. I think the problem "O" had in that link is unusual.


Jim

This is from a recent post on the " DYNAMIC BLACK problems with BENQ W7000 " thread ( 3K and up section ) -

So, I thought I might re-post Coldmachines fix for the dynamic iris on the Lumis, in case anyone missed it and needs it ( its buried way back in this thread somewhere ) -

IRIS PUMPING FIX
My own DI became slightly visible a while back, and a hard rest took care of it.

I only mention this as I was given the following advice, if a straight deselect/reselect of the DB fails to clear the issue.

Assuming the DI is selected and the unit is powered up.... De-select DI and power down the entire unit, including the Host. Disconnect from mains.

Reconnect and power up. Select DB to on. Power down as before, including mains disconnection.

Reconnect and power up. Done.

I love my lumis... I have been working on a home gym project for the last 3 years. Is there anything on the horizon that will significantly outperform the lumis, in that price range? Finally finishing the gym project in the beginning of Feb... time to go back to Home theater and catch up, but doesnt seem like I missed anything the past 3 years.

IMO not really. I'm holding onto mine until SIM comes out with a 4K laser Lumis.

Hi Everyone

I just changed my Lumis bulb. I have a very silly question. When you change "Variable Iris" settings in the menu from 0 to 100, are we opening up the iris from minimum to maximum i.e. increasing the light output, or is it the other way around? When iItry changing the variable iris , I dont see much change in aperture or light output, although I do hear iris moving.

mani

As I understand it, its a trim iris ( not related to the Dynamic iris ). Set it at 100 if your new bulb is too bright ( if I remember correctly - my projector is off after a long day of movies ).

I just put a new OEM lamp in my spare original housing. Bright is good !!

What's the difference between the Lumis 1080p and C3X 1080p?..

I think the C3X is discontinued, replaced by the Lumis Uno -http://www.sim2usa.com/home/us/grand-cinema-line-usa

The two biggest differences between a Lumis and a C3X1080 is (respectively)...

Bulb: 280watt max VS. 250watt max
Dynamic Iris: Has one VS. Doesn't have one

Just FYI - the Lumis Uno and the Lumis Solo Uno do not have a dynamic iris either.

What's a Lumis SOLO UNO? There is an UNO and there is a SOLO. The Lumis 3D UNO has 10bit processing and 120fps and no dynamic black. The SOLO has 12bit processing, 144fps (triple flash) and a proprietary dynamic black that is not a DI. The lamp in the UNO is 260w; the lamp in the SOLO is 280w. They both use full-size .95 DC4 chips.

Sorry - meant to say Lumis 3D Solo uno - http://www.sim2usa.com/home/us/content/lumis-3d-solo-uno

Pete, thanks for pointing out my mistake saying Lumis uses a dynamic Iris when in actuality it uses Dynamic Black. -Paul

PS: Since it was mentioned, the C3X1080 also uses full size .95" DC4 chips

Hi Guys,

today I wanted to recalibrate my lumis as it has 770 hours on the bulb. As it looked dim I also measured 100 IRE and found only 3,9 fl on my 120" clear pix2 screen (calman with C6 sensor@280W setting, iris open) - that is very low light, dont't you think? Has anybody measurements near that hours on his lumis to share? I think that this is too early to loose that much light power?

What did you measure with the same instrument when it was new? When comparing brighntess levels from meters not designed explicitly for illuminance or luminance mesurment, particularly tristimulus devices, I recommend using them for comparitive datapoints only, not absolute. A nitpick perhaps, but if you are pointing the meter toward the PJ (assume you are), then you are measuring ftc not ftL. Multiply times screen gain to get ftL.

hi,

I meassured 16fl@90hrs. calibrated with the same sensor!

Then about a 75% drop over 800 hours does seem high to me.

that´s my point!
maybe some of the other lumis owners can provide some numbers, or when they had to change their lamps?

regards
m(c)

Sure. I got one of the very first Lumis Host units. My first lamp wasn't nearly as bright as I had hoped. I got it in May of 2009. Initially, I was only getting 603 lumens on the lowest power setting. Then, someone discovered that using HDMI input # 3 on the Host resulted in a brighter picture. Doing that gave me 742 lumens in the lowest power setting ( and about 18 foot lamberts off my screen ).That was back in Feb. of 2010.
At some point I measured -
220 watts = 636 lumens
250 watts = 717 lumens
260 watts = 742 lumens
At 442 hours with 270 watts I measured 852 lumens. 4 - 14 - 2010

I have other measurements, but I wasn't good about writing down lamp hours. I was more concerned with it being too dim and time to change the lamp - hours be damned ( probably from my days of owning an Optoma H79 - damn things were dim at 370 hours !! ).

I got a new lamp on 7 - 28 - 2010.
At 4 hours, with 230 watts , I measured 1051 lumens !!
At 745 hours with 280 watts, I measured 860 lumens.

On March 6th I decided to take my current lamp out and save it for a spare, and try installing an OEM lamp in my first housing, since that lamp is too dim for my tastes anyway. It was easy. So far I have only measured the initial output - 260 watts = 1076 lumens. The lamp seemed to actually get a little brighter once it had a few hours and settled in. I'll try taking a measurement tonite if I watch anything.

That's all I've got. If you need a new lamp - call me - I might have a nice surprise for you !
Edited by Craig Peer - 6/6/13 at 12:01pm

Hi Craig,

thank you for your infos! I´m courious how bright my picture will be with a new lamp - hopefully even brighter than before (according to your findings) ;-)

M(c)

Well, Art S. around these forums found a 10% variation in the brightness of new lamps, but certainly a new lamp will be brighter then what you've got !!