New constant height install, need tips and procedures for Isco 3 install

This evening a friend and I will start installing the various components that will eventually transform the theater into a constant height viewing experience, placement of the components will be more critical than usual because the theater will also be hosting a second screen which is already mounted which is a 110" highpower, the RS1 will be viewed on that screen and the 125" diagonal highpower scope screen will play host to the marantz 11-s1 with Isco 3 lens, which brings me to my next request. I have heard previously about some setup tips for installing and setting up the lens I believe it was Vern Diaz who posted it, in any case if anyone has helpful proven procedures that we can follow that would be great so when we get to that part of the install we have some idea of where to start, thanks in advance.

yep its working thanks

well a big thanks to my friend Jeremy (agrsiv95 ) who showed up friday night to help me install the 125" diagonal dalite highpower screen and Isco 3 lens, since this was a custom install most things had to be fabricated from scratch including a new mounting point for the Marantz 11-s1 and Isco 3 lens, the dalite highpower screen had to also share the front wall with a dalite highpower electric screen so placement was pretty crucial, we started the install roughly 8:30 pm on friday night and called it quits 6:30am saturday morning, we got the screen installed, mount for pj and lens fabricated and installed, Jeremy took the lead in the install and he will be checking this thread for some advice that you may have for us, the Isco lens is approx 12' 7 inches from the screen and the pj lens is approx just over 13' from the screen, we can get a perfect 16x9 image on the screen but when we put the lens in place we get pincushioning on top and bottom, he tried everything to try and dial out the pincushiong including rotating the Isco lens but nothing seems to be able to work, we feel that we can get a better result althought it may take some time and some advice from someone who has a lot of experience with this, Im sure Alan,Vern and maybe Cavx my chime in so I decided to take some pics of the setup and the test pattern to show what we are getting, we have used the test pattern in the marantz and also dve with no luck in obtaining a perfect rectangular image, I will say that even though the test pattern say that we are off in our setup of the Isco, watching a clips from a movie(seabuscuit) looks like nothing really wrong and looks great however I know that the lens can be dialed in better than what it is, Ill post some pics and feel free to let me know what you think. thanks in advance

as you can see from one of the pics above we are able to achieve a good 16x9 test pattern, here are some more shots of the equipment and how its setup

although we dont have perfect geometry according to the test pattern image still looks good, a testiment to the Isco im sure, focus on test patterns seem to be off on the left side of the screen as well but not very noticeable in an image so we are wondering what we are doing wrong, any ideas? again forum member Agrisv95 is taking the lead on my install and he is determined to get it right so he may be asking questions as well

we did try twisting the pj and although he had some success we still could not dial it in completey, I doo agree that we need to keep at it

Mark thats what makes this so nutty, going by the test patterns alone It seemed like at times we were way off but by looking at the images themselves it looks quite acceptable to me at the moment however Jeremy and I have that nagging feeling that there is more to be squeezed out from this great lens, constant height experience is really addicting, I rolled down my 16:9 dalite screen in front and it looked like a 4:3 screen in comparison, we will keep at the geometry issue, im sure that edge to edge focus and geometry have room for further tweaking but so far to my naked eye it looks very good im sure due to the good glass in the Marantz and the Isco

at the moment we would like to get back to basics, first and foremost we want to understand the test patterns used for setting the image correctly, I have been told in the past that using the test pattern inside the pj isnt the best way to set your anamorphic lens, so can anyone tell us exactly what source is generally accepted as suitable for setting up an anamorphic lens? should we be using the crosshatch patterns in dve,avia etc? we just want to know so we understand that our patterns are appropriate for the anamorphic stretch

Vern since we dont use a htpc is there a dvd based test pattern we can use that you can recommend?

it cant possibly be this difficult, how come ive never heard anyone having trouble finding test patterns before? everyone cant be using htpcs

lol just sold my lumagen but my Anthem D1 is at Anthem getting upgraded to D2 Status with Gennum vp, hopefully it will have the necessary test patterns