Projector Keystone corner correction
Projector Keystone corner correction
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Discussion

Alfachick

Original Poster:

1,639 posts

219 months

Thursday 10th November 2011
quotequote all
If anyone can help with this question then I would be grateful... First a bit of background.

I am getting shelving put in my living room at the moment, and the plan is to project from the back wall to above the fire place. Now the shelving is going to be all the way across the back wall, normal shelf depth. Obviously to fit AV equipment onto the shelf it is going to have to be deeper than standard, I figured about 56cm to give space for cables etc.
Now I have a recess in my back wall that goes back about 13-15cm and I was thinking that this could be used to get some of the depth that will be needed on the shelf.
However...
Having done some measurements (with a piece of string, v. scientific) I figured out that the centre of the projectors lens is going to have to be about 1cm tot he left (as you look at it) of where the recess ends. Thus meaning that I would have to make the shelf 56cm deep from the normal wall depth. Which is a pain.

So I have been looking at projectors, and noticed that some come with keystone corner image correction. Would this be able to correct the image if I had the lens about 10cm off centre to the right as you look at it? The distance it will be projecting is about 5m onto a flat wall.
I have been looking at the JVC DLA-350, if this helps answer the question.

Thanks in advance. All help very much appreciated!

Trustmeimadoctor

14,266 posts

177 months

Thursday 10th November 2011
quotequote all
no thats not what you want to look at you want lens shift
http://www.projectorpeople.com/resources/lens_shif...

Alfachick

Original Poster:

1,639 posts

219 months

Thursday 10th November 2011
quotequote all
Thanks for that. Very useful link. thumbup

OldSkoolRS

7,075 posts

201 months

Thursday 10th November 2011
quotequote all
You'll be fine with a JVC HD350 as it has powered lens shift for height and width. In fact I moved mine from being level with the centre of the screen (heightwise) to level with the top of the screen as I found this improved the picture having some lens shift applied got rid of a slight 'ghosting' I saw most noticable on end credits. Therefore I'd recommend you raise the height of the shelf to allow this shift.

I'd had mine nearly 3 years now and although I've added an Isco II anamorphic lens and a Lumagen Radiance video processor to 'perfect' the calibrated image, I find it hard to justify buying a newer model as they (IMHO) don't look £2K better. I can't watch 3D anyway. Just as well as when I bought mine they were over 3K, these days a used one fetches maybe £1k so make sure you get a good deal on it as the newer X30 is due out soon, making this model 3 generations old.