The Unofficial Mits 7800 Thread....

No lamp wattage spec's? I thought this projector was larger than what it seems to be. Looks to be a pregnant HC4000.
This would make it the smallest DLP priced in the 2k range and up. Too early to tell, 3D will be great, but I doubt 2D can match DLPs as a whole in the upper range.

Now our projector's have gender, lol.

You can add that it is based on the HC4000 platform. So the lens is probably the same. Basically I think the 7800 is a 4000 with lens shift, 3D and a DI added. Which is not a bad thing.

Projector central in is preview of the 7800 mention 700:1 ansi contrast and he also mention he will have a full review late september...

http://www.projectorcentral.com/mits...0d_preview.htm

Do we know yet if the 7800 has a lens memory function for CIH setups?

I've decided this will be my next projector! Now I'm trying to justify upgrading my 1.1 screen to a HP. I know 3D will be amazing but I watch 85% 2D. My main concern is how bright the 2D image will be, blinding I'm assuming. Also what kind of decrease in blacks should I expect?

No lens memory since it has manual controls, but it may have the CIH compatible aspect ratio adjustment without a lens that you can use with manual zoom (Zoom in once and forget it), some projectors do not have this either. We do not know this yet however.

I have some guesses on Lumens, but they are somewhat wild guesses.
Based on the fact it is rated at 1600 lumens by the MFR, my guesses are something like this:

Best Mode Lumens Lamp Low:
600 lumens

Best Mode Lumens Lamp High:
750 lumens

Semi-Accurate Non-Best Mode:
1100 Lumens (3D Mode with semi-accurate color)

Absolute Brightest Mode:
1400 Lumens

These are somewhat conservative guesses, the real best mode lamp high could even be over 1000 lumens potentially.

+1 interested to find out if this projector will support CIH setups (my situation is 8' ceiling which complicates matters all the more based on anticipated 18" offset I've been reading about HC4000 has).

How hard would it be to use the 7800 with a ND2 filter in place for 2D, removing the ND2 for 3D movies? That is one advantage to having a projector with a manual iris. I am talking about using the projector with a higher gain screen so that 3D is plenty bright.

What HP screen(s) are you thinking of? Since Dalite discontinued their HP screen I'm wondering what you're considering make/model and what gain.

My understanding is that Da-llte changed the HP slightly so that it has slightly less gain (2.4 from 2.8) but a wider viewing angle. Maybe I'm wrong.

That is correct, the HP 2.4 gain screen should work better from a higher up mounted position than the HP 2.8 gain screen.

I used this HP screen calculator to calculate the below values:
http://www.avsforum.com/avs-vb/showthread.php?t=966057

If the Mits is limited to 20% Offset from a ceiling mount position (or upside down shelf mount), then you will get about 1.8 gain from the new 2.4 HP or 1.4 gain from the old 2.8 HP. This assumes you are able to mount the projector directly over your head (or nearly) and sit underneath it. This also assumes a person is 5' 8" tall and sitting somewhat in an upright position. If the same person is standing and not sitting down, they will get 2.25 gain out of the HP 2.4 gain screen. In the below example, the screen is mounted 20" above the floor. 1.8 gain is still very good for a projector rated at 1600 lumens.

If 3d glasses cause an 80% lumen loss (is that right?), then if we are getting 1100 lumens,
that is about 400 lumens at 1.8 gain if sitting upright or about 500 lumens if standing up.

For a 110" HP 2.4 screen for 3D at 1100 lumens base,
400 Lumens is 11 fL (sitting down) after brightness loss from 3D
500 lumens is almost 14 fL (standing up) after brightness loss from 3D

For a 110" HP 2.4 screen for 3D at 1200 lumens base,
430 Lumens is 12 fL (sitting position)
540 lumens is 15 fL (standing position)

For a 110" HP 2.4 screen for 3D at 1300 lumens base,
468 Lumens is 13 fL (sitting position)
585 Lumens is 16 fL (standing position)

----Again, assuming an 80% lumen loss from the 3D glasses. This also assumes the screen is 20" above the floor.

If you lowered the screen to 10" above the floor, you will get right at 2.0 gain for the HP 2.4 screen on a 110", or 2.4 gain if standing up (in other words, if standing up with it this low, your head would basically be right next to the projector's lens).

Da-Lite makes two High Power screens. One is white 2.4 gain and the other is high contrast 2.4 gain. Also there are lots of high gain screens on the market, Black Diamond makes one and Stewart makes a couple among others.

IMO, the #'s are deceiving. I just had a 2.4 side by side with my 2.8 and the difference isn't .4 gain. I know some have measured the older material at over 3.0+ gain. Maybe the new material is slightly below spec.

projector was in the same spot for the tests. This makes me appreciate the 2.8 even more, it's a shame they couldn't find a way to continue making this material.

If I could get 2.0 gain on the lens shift that built into the 7800, I'd still considering it if it has a decent lumen output in 3D. It should excel in all 3D modes vs. the LCOS & LCD projectors.

No word on the Acer 9500, it sounds like the 7800 will hit first.

I'm really interested if someone has compared this projector against a LCOS (JVC X3) in 2D. What is the difference? How about the black level?

I had a 110x62 HP2.8 for ~ 4 yrs and liked it very much, but decided about 8-9 months ago that I wanted a larger screen (it does grow on one, doesn't it!); by the time I was ready the HP2.8 was no longer available. I got samples of the new HP2.4 and the HC HP2.4, and put them up along side old samples I had of the HP2.8 (by this time I had sold the old screen and was just showing on the wall).

Yes, the HP2.8 is brighter head-on than the HP2.4, but I actually liked the new HP2.4 better, primarily because the pic seemed smoother. I never had any complaints about this with my old HP2.8, but seeing the new one I felt it was better. The HC HP2.4 had such a narrow viewing angle that the sides of where my new large screen (144x72) would be were noticeably darker than the center. With the regular HP2.4 the brightness was quite uniform over the whole screen.

When at CEDIA recently I went by the Dalite booth to tell them how much I liked the new HP2.4 material, and the guy I talked to said that they had incorporated some of the JPK Affinity features in it, presumably accounting for my perception of the smoother pic.

I know many here lament the disappearance of the old HP2.8 material, and that was certainly my initial reaction because I had liked my old screen so much. But I now believe that the new material is actually an improvement, even though a bit less gain.

The only reason that the Mits 7800 is at the top of my list are the early reports of its amazing 2D to 3D conversion. If it lives up to the early hype I'll probably buy it.

Ill buy this projector if it projects in 2D.....seriously, while it clearly sounds like a great 3D image producer, great for gaming and sports like hockey as its DLP (all huge positives for me) i still need to know that it has a really good 2D image.

what would be the best comparables or where would it slot in with respect to other brands?
if i had a JVC rs 40 to compare it to, does anyone believe it would be in that ballpark in terms of overall PQ? far worse? not quite there but pretty sweet?

sigh....i suppose ill have to wait for the reviews...

3D is all that we can talk about. The HC7800 was not shown in 2D.

What size HP screen and can you mount the HC7800 as low as it allows?

I have a Da-Lite Hi Power. I presume that this is the screen you are going to get. I think the correct figure for the current screen is 2.4 not 2.8. Even so when I check prospective new projectors using coderguy's calculator, every one is bright enough. If for a movie theater the criteria is 12 ft./candels. My minimum brightness criteria is around twenty. Even on old bulbs I will always get that.

So I don't have to pay attention to britheness specs. On my screen everything is bright enough.

Surely there must be a downside to that much gain (2.4)
everything is bright enough but where are you losing out?

Just in the viewing cone, the viewing cone area is good for generally 2-3 people (you can cram 4 though) because as you move seating positions horizontally, the brightness dims from center-point.

The brightness varies as you move left to right on your sofa, but it's not so bad as to be noticeable when you're moving your head (I mean if you move your head drastically you can see it), but generally only if you completely change seating positions do you get a different brightness level.

I'm okay with waiting, I just wish specs would get released for the HC7800 so I could figure out if it will work in my home theater room where I don't want to give up my CIH 16:9 and 2.35 switching and I have 8' ceilings, would ceiling mount it, need to know if even a candidate. If specs released and isn't a candidate I could then move on to my backup plan, a Sony HW30 which is readily available...