Optoma HD20 - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com
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post #31 of 66 Old 10-08-09, 04:45 PM Thread Starter
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Re: Optoma HD20

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rmerlano wrote: View Post
Custard, I would like to know the size of your screen. Could you help me?

Regards...
my screen (or should i say wall) measures 122" diagonally for 16:9.
it is painted matte gray with a gain in the region of 0.85.
the measurements i have shown are taken using a white panel though.

coming from a former owner of the hd65 who moved up to the hd20 i would definitely recommend the upgrade.
If you are happy with the brightness of the hd65 on your large screen then i cant see you having an issue with the hd20 as i have found it to be brighter. there are some images i put up ealier in the thread comparing both.
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post #32 of 66 Old 10-08-09, 05:01 PM Thread Starter
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Re: Optoma HD20

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Good job Custard!

I have read somewhere else that calibrating the 100% color saturation points is good but not the best you can do. Actually this is because projectors do not tend to be linear in behavior and are generally less saturated than necessary below 100% color input signal.

What I mean is if you have a 100% saturated red input signal with the projector outputting 100% red color, if you try a 50% saturated red signal input, you'll most probably obtain 20 or 30% saturated red output. To overcome this, I calibrate my projector at 75% saturation points (approx.). This leads to a more linear response up to 75% saturation input signal (where most of the colors practically are), then you'll find that with a 100% input signal, you'll have an oversaturated output from the projector (but linear colors up to 75% input signal). And anyway oversaturated output is not that noticeable by the eye but a good 0-75% input range will make the picture more lively with more pop. From the other side, the power supply of the projector won't be able to deal with a lot of oversaturation, which is a good thing to limit the oversaturation error above 75% saturation input signal...

I don't know if I'm clear but I'll be happy to elaborate a little bit more if you want me to!

Enjoy...
thanks for the info Blaser.

i have read this aswell.

i know Calman allows this but my free HCFR software version does not unless the figures are edited manually. it seems that previous versions had this facility but i cant seem to find this in the current version.
the problem with replacing the 100% saturation with 75% is that it messes up the gray scale calculations in HCFR.
i suppose the workaround for this would be to carry out two separate measurements for the color gamut and the gray scale.

i'll have a go with the 75% saturation this weekend...
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post #33 of 66 Old 10-08-09, 05:07 PM
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Re: Optoma HD20

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custard wrote: View Post
my screen (or should i say wall) measures 122" diagonally for 16:9.
it is painted matte gray with a gain in the region of 0.85.
the measurements i have shown are taken using a white panel though.

coming from a former owner of the hd65 who moved up to the hd20 i would definitely recommend the upgrade.
If you are happy with the brightness of the hd65 on your large screen then i cant see you having an issue with the hd20 as i have found it to be brighter. there are some images i put up ealier in the thread comparing both.
Thank you very much Custard!
I appreciate your comments, i´m very interested in buy the HD20. Hope in december have it under my ceiling!!
Have you completely setting the HD20 now?
Could you post more images?

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post #34 of 66 Old 10-08-09, 05:24 PM Thread Starter
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Re: Optoma HD20

there are still some things i need working on....

its a fairly basic setup in my lounge with the hd20 on a wall mount that i made myself.





quite ugly looking but it works!


i'll get some pics of the hd20 in action over the weekend for you. do you need to see any in particular?
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post #35 of 66 Old 10-08-09, 05:29 PM
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Re: Optoma HD20

Thanks for the pics of the optoma, I like the idea
Any pic of any movie Full HD will be welcome. but if you have King Kong, Dark Knigh or Casino royale I´ll apreciate it..

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post #36 of 66 Old 10-08-09, 05:39 PM
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Re: Optoma HD20

Quote:
custard wrote: View Post
thanks for the info Blaser.

i have read this aswell.

i know Calman allows this but my free HCFR software version does not unless the figures are edited manually. it seems that previous versions had this facility but i cant seem to find this in the current version.
the problem with replacing the 100% saturation with 75% is that it messes up the gray scale calculations in HCFR.
i suppose the workaround for this would be to carry out two separate measurements for the color gamut and the gray scale.

i'll have a go with the 75% saturation this weekend...
Hi Custard,

I have tried both calibration methods and really prefer the 75% for its pop and life like quality. Keep us posted!

ASME AI
Yamaha RX-V2500, Wharfedale Diamond 9.6 Fronts, Wharfedale Diamond CM Center, Diamond DFS Surround and rear, Behringer FBQ 2496, Dual RL-P18s 625L LLTs, Dual TA-2400 Pro (2 * 2000 W Amp), Samsung HD870 DVD player, Carada BW 16:9 106" screen, Epson TW-2000, 60 Gb PS3
Important HT proverbs:
- "You can never have too much headroom" (talking about bass)
- "you can never have too big a screen" (talking about still pictures)


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post #37 of 66 Old 10-08-09, 05:43 PM
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Re: Optoma HD20

Thank you for the Optoma´s pics It´s a great idea.

About the next pics, any screenshot of any movie Full HD will be OK, but if i cana choose...

King Kong, Dark Knight, Casino royale, Transformers... would be excellent!!

Cheers and thank´s again.

RM
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post #38 of 66 Old 10-08-09, 05:52 PM Thread Starter
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Re: Optoma HD20

Rmerlano and Blaser - looks like you guys have set my homework for the weekend!
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post #39 of 66 Old 10-08-09, 05:59 PM
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Re: Optoma HD20

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Rmerlano and Blaser - looks like you guys have set my homework for the weekend!
I don´t see any dissapoint about it!!

I´m happy to help you hehe
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post #40 of 66 Old 10-08-09, 06:30 PM
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Re: Optoma HD20

It's a pleasant homework though, I'll be working during the weekend in a tender bid preparation

ASME AI
Yamaha RX-V2500, Wharfedale Diamond 9.6 Fronts, Wharfedale Diamond CM Center, Diamond DFS Surround and rear, Behringer FBQ 2496, Dual RL-P18s 625L LLTs, Dual TA-2400 Pro (2 * 2000 W Amp), Samsung HD870 DVD player, Carada BW 16:9 106" screen, Epson TW-2000, 60 Gb PS3
Important HT proverbs:
- "You can never have too much headroom" (talking about bass)
- "you can never have too big a screen" (talking about still pictures)


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