JVC DLA-RS1 Owner's Thread - Page 5

Frank, what CC filter are you getting (type and size) and what measurement are you basing the need for the filter on?

Rob,

I'd like to make a suggestion that you change the title of this thread to include the HD1... maybe something like " JVC RS1 / HD1 Owner's Thread"... and BTW, it's nice to see you dropped the "Official" from the title!

There are already more HD1's in the consumers hands (overseas) and once the HD1 goes main stream through the B&M stores in the US, I suspect those numbers with continue to increase.

BTW, I asked earlier, but I didn't see the answer posted yet...

Is there any loss in light output or PQ for using the lens shifting in either (or both) directions?

What is a CC filter and why would that improve the contrast?

Well I read somewhere that some VPs, such as the Lumagen, allow LUT access for professional calibration to fix the shading/uniformity issues. I forgot which thread that is, though... Also, isn't it with a VP, that you can further calibrate the color balance and gamma tracking across the board for better grayscale since CMS does not exist in the RS-1?

Btw, if this will be the official thread for reviews can we include a poll ranking this unit - which only RS-1 owners can participate in?

Hi Ekkehart. Since you took overscan measurements using analog YPbPr, I went back and checked the 576i/576p analog YPbPr overscan on the RS-1.

The overscan at the sides with 576i was about 3.75%, which is about 27 pixels. That is high, but apparently not as high as the HD-1 you checked. The overscan at the sides with 576p was about 2.5%, which is about 18 pixels.

Thanks.. i will check with some other machines next week...

Regards,
Ekkehart

No access to the LUTs, but the Lumagen does have the 10 step grayscale, gamma correction and color decoding and can fix overscan issues.

Hi everyone,
I have a built a new home & made a 26x14' theater with 8.5' ceiling in our basement, so there's no ambient light issues. My questions are what screen size is too large & can an anamorphic lens be used?
Also, using JVC's lens calculator has confused me. I get a red maximum horizontal offset % error when the top of the screen is centered on the projector lens. My math says that would be 50% of the screen height where 80% is the maximum. What am I doing wrong?

perhaps we should start tracking firmware versions (especially wrt any problems we are finding) so we can eliminate that variable? I searched the manual for a command sequence to show the version but no joy ... nonetheless it seems likely that it's present somewhere on one of the menu screens. I'd have been happy to poke around till I found it if my preorder hadn't missed the cutoff

paul

DERG,

Do you have the JVC calculator with the RS-1 included? I only see "RS-1 version coming soon" on the JVC Digital website. If not, that could be the reason as the RS-1 has a lot more flexibility than previous models.

As for you other questions, Bob Sorel posted a very nice summary about choosing a screen:

http://www.avsforum.com/avs-vb/showthread.php?t=753497

Jay

Tom, William, or anyone who has the RS-1 and uses a Harmony (or other) remote. Does the RS-1 use the same on and off IR codes as the HD10K? If so how do you program for them? Please see this thread or this one.

I'll bet you are using the calculator which has not yet been updated (just as jsnable suggested). This calculator defaults to a proj with has a 50% offset - so your math was correct, its just that the calculator is not allowing for the 80% offset found with the DLA-RS1.

Color Compensating filter.

UHP lamp has lower red output.

In normal mode projector is at D6500 in dynamic mode colortemp is higher.
Green and blue dominate but you get a brighter picture. Red is maxed out but green and blue have some headroom left.

With a red cc filter you can use the projector at it's maximum setting for red output. Green and blue are lowered by the red filter and the loss in green and blue can be compensated by adding some gain. Max lumens output will be a little less or equal depending on the headroom left in the red when the projector is at normal colortemp setting.

Contrast will be improved because the filter is reducing the light in dark/black scenes.
During 'total black' scenes stray light is reduced.

The light reduction in bright scenes is minimized by maximizing the gain settings while the light loss in dark scenes leads to deeper blacks. -> Better contrast.

C4H optimizing was included in the purchase.

I know it's a glass filter but size and type I don't know yet. The fitting wasn't ready yet so I get it posted some time later (with an additional lamp also included in the deal).

Cine4home has a great explanation (in german) and from their websit I gather they use colorfacts and Gretag McBeth Spektroradiometer "Eye One".

CC is actually color compensating filter. Color correction filters are varying degrees of either blue or orange and correct/convert daylight to tungsten or vice versa. For example, a tungsten balanced film requires an 85 color correcton filter (orange-ish) to convert the light of day (5600K) to be correct on the 3200K tungsten film. Color compensating filters are used to shift color off what would be the black body curve on the CIE chart. Often these are of a magenta or green hue.

Not sure what this red filter is without actual nomenclature/name for it. They usually have the prefix "CC."

Corrected

Sounds good Frank but I thought cine4home posted here that unlike the Pearl the RS1 does not have the headroom and therefore not much benefit (if at all) would come from the CC filter approach using a CC. Perhaps I misunderstood? Maybe he was saying you couldn't improve contrast but could improve black level without reducing lumens (which I still don't get how that is even possible).

In normal mode the projector is at D6500. I suspect the red isn't maxed out in this setting to leave some headroom for the contrast/offset controls.

In the dynamic mode with the higher color temp red could be on the limit.

So I assume there is a little headroom to play with. However I expect not much because the projector already does pre filtering inside.

If the output is 600 lumens in normal mode and after CC filtering and boosting red gain to max then output can be still 600 lumens (instead of the 670 lumens in dynamic mode) In comparison to the normal mode there is little or no light loss. However the black levels are improved because there is also light loss from the filter in dark scenes. Overall the dynamic range will improve. How much wil depend on the available headroom.

I'm shure Ekkehart can do a follow up with actual measurements.

I was under the impression that is is the red spectrum that is lacking magnitude and the light path design is for the UHP lamp. Without measuring, I would think any filter put in front of the bulb would change the x,y coordinates of all the primaries. I would think a red filter in the light path for red might help, but I would rather correct the x,y coordinates of the primaries and sacrifice a little light output.

Then the other concerns that comes into play is that Mayer posted that adding the CC filter can have a significant impact on ANSI CR.

Rob or other -
With these arriving now...

Just thinking it might be a good idea if someone could post suggested "out of the box" quick settings to get started?

The early reports suggested D65 pretty much out of the box,
but now I'm not sure, if thats the case or just how to quickly get close to that?

What's the best setup to get started with a HDTV box or DVD player?

So we don't jump the gun and make rash judgements

Wow, this thing is bloody gorgeous out of the box in that piano gloss black finish!! Much more refined finish than the pre-pro.

JVC Pro, please consider putting some packing between the sides of the box and the sides of the projectors. There is nothing but air between them, and a hole designed as a handle on each side is already a compromise to the integrity of the cardboard box in that area.

I second the opinion that is is one sweet looking PJ. THe glossy finish is awesome and makes the thing look higher priced than it is.

I am about to go set mine up.

They are not double boxed?

I'm really more interested in the projector spending as less time during ground transport as possible. IF it's Thursday, it is OK by me. UPS will still send a special truck today if they want to ship esp. if they tell them what happened with Fed-ex. UPS is 4 times the size of Fed-ex and has the manpower to make a pick-up at short notice. The reason that Fed-ex can not pick them up is that they have separate operations for everything. UPS ground and air are handled by the same location. Only frieght is not. One call right now and a special truck would be sent. Fed-ex is cheaper, this is why.

I've had far fewer problems in the past with ups compared to fedex...

Just got the first three RS-1's delivered! Heading home to set up for a quick comparison with the Ruby. Cannot do much until I lose some of this daylight, but I expect to start seriously comparing the two this evening.

Jim