Posts by sarangiman

Quote:Originally Posted by A.West Sarangiman, look up discussions of lens sharpness varying with aperture. An iris in a projector is similar to the aperture of a camera lens. Photgraphers know very well that sharpness varies as...

I remember asking this before, I think on this thread, so I figure I'd answer it here (though it'll probably get drowned in all the other discussion!): I always wondered why contrast ratios appear to increase as the iris is stopped...

Quote:Originally Posted by RonF Not sure why that is considering how fast the alcohol evaporates. Why do you think that would be.....after being apparently completely dry, it keeps getting more uniform a day later?? Apart from it...

What Kelvin said. You can't buy a $4k projector & put a $10 ND filter in front of it. I forget if my HW50 has a filter thread on the lens. If so, get the a B+W multi-coated (MRC) ND filter. B+W filters always have a great multi-layered...

FYI I see the same thing, durack. Going to 'Auto Limited', which never allows the iris to open fully, immediately makes focus uniformity much better on my screen. Kind of sucks, b/c it means that as the lamp ages and you open up the...

Sorry guys; I had to correct one of my statements above. The underlying weave/texture of the Draper Radiant, Contrast Radiant, Da-Lite HP & HCHP all appear to be the same. Makes me wonder if all the screen materials are sourced from...

For the sake of not spreading misinformation: a close inspection of the underlying weave/texture of the Draper Contrast Radiant sample & the HCHP sample indicate that they're exactly the same material. Sorry, previously I'd said they...

Quote:Originally Posted by mac_hs10 How can I complain to Sony? Call them? They probably have me send it in and take a quick look and say nothing is wrong. What's wrong with your first projector? Call Sony Installer Support:...

Quote:Originally Posted by noah katz Actually you're correct as you explained in your previous post - it's the difference in grayness. Too bad the CR isn't what I thought - an even more directional retroreflective screen. My...

I redid a test tonight to quantitate gains of HP, HCHP, Draper Contrast Radiant, & Draper Radiant using the patches only (instead of my full HCHP 110" screen). Will quantitate all that and post back tomorrow. As it turns out,...