bigkid Posted February 19, 2019 Share Posted February 19, 2019 Hi all. Apologies for the frequent newbie questions but I am struggling to get my head around my first projector. I am trying to settle on positioning the screen and projector for the best picture quality. I can place the projector perpendicular to the screen in the horizontal. However, while there is a little wiggle room, it is likely that the projector will be above the top of the screen by up to 50cm, or down to 22cm if I raise the screen above ideal height. I cannot lower the projector as I am 205cm and it will be a pain to negotiate to get to my seat. I see that it is recommended that keystone be avoided as it compresses and can add artifacts. The x7900 I have has lens shift and I have the Peerless PRG-UV mount recommended by a number of users here. Do I have enough adjustment in these to get the picture square without relying on keystone? Thanks all. Allan Link to comment Share on other sites More sharing options...
betty boop Posted February 19, 2019 Share Posted February 19, 2019 9 minutes ago, bigkid said: Hi all. Apologies for the frequent newbie questions but I am struggling to get my head around my first projector. I am trying to settle on positioning the screen and projector for the best picture quality. I can place the projector perpendicular to the screen in the horizontal. However, while there is a little wiggle room, it is likely that the projector will be above the top of the screen by up to 50cm, or down to 22cm if I raise the screen above ideal height. I cannot lower the projector as I am 205cm and it will be a pain to negotiate to get to my seat. I see that it is recommended that keystone be avoided as it compresses and can add artifacts. The x7900 I have has lens shift and I have the Peerless PRG-UV mount recommended by a number of users here. Do I have enough adjustment in these to get the picture square without relying on keystone? Thanks all. Allan lens calculator here allan can play around https://eu.jvc.com/specials/2017/d-s/ Link to comment Share on other sites More sharing options...
bigkid Posted February 19, 2019 Author Share Posted February 19, 2019 (edited) Thanks Al. Looks like if I raise the 96in screen up so that the bottom of it is 1m above the floor (80cm would have been ideal - but not too fussy), there is enough adjustment in the lens shift to accommodate the x7900 at 22cm from the ceiling to the centre of the lens. I can squeeze another 2.5cm out of the mount by adjusting the arm's 'feet' so that I don't have to max out the lens shift and I'll still have further wiggle room in the mount's roll and pitch adjusters for fine tuning. Assuming I am reading the following correctly I am not sure what the significance of a Possible Setting Area Horizontal of 0 might be??? Cheers, Allan Edited February 19, 2019 by bigkid Link to comment Share on other sites More sharing options...
Quark Posted February 19, 2019 Share Posted February 19, 2019 8 hours ago, bigkid said: I am not sure what the significance of a Possible Setting Area Horizontal of 0 might be??? Cheers, Allan As you max out the vertical lens shift, you lose horizontal lens shift (and vice versa). 1 Link to comment Share on other sites More sharing options...
bigkid Posted February 19, 2019 Author Share Posted February 19, 2019 Thanks Quark. So, shouldn't be a problem if centered and I'll still have a little adjustment in the mount. Cheers, Allan Link to comment Share on other sites More sharing options...
Quark Posted February 19, 2019 Share Posted February 19, 2019 7 minutes ago, bigkid said: Thanks Quark. So, shouldn't be a problem if centered and I'll still have a little adjustment in the mount. Cheers, Allan Yes, you should be fine. Link to comment Share on other sites More sharing options...
hopefullguy Posted February 20, 2019 Share Posted February 20, 2019 hmm this is your first projector? akin to getting a top range bmw as a first car haha just some questions more related to "visual performance". a 96" screen would be classed as quite small, is there a reason for this size? how far are you seated from the screen? the height of the screen at 1m could be excessive, even 800mm from my use is too high Link to comment Share on other sites More sharing options...
bigkid Posted February 20, 2019 Author Share Posted February 20, 2019 Hi hopefullguy. Haha! I got a good deal on the x7900 second hand, and with only 85hrs on the clock! Otherwise I probably would have gone for the Epson 9400 when it comes out. The guys here convinced me to go with the JVC. Yes, it is a small screen. Part of that never ending compromise that is a marriage. It is a multipurpose room and my wife wasn't going to have anything bigger. The screen also had to fit between the main speakers and there is no room to widen the space bewteen them. We are seated about 3.5m from the screen in Stressless chairs - which encourage a bit of reclining and line of sight appears to comfortably fall around 1.6m up the wall. Irrespective, I take your point 1m is too high. I just don't see any option. The room is here: Link to comment Share on other sites More sharing options...
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