Kotsinadelis, Peter (Peter) wrote: > ANyone want to answer the original post?
Well, if you insist... I engraved a screen using a needle from a pair of compasses in a handle. You have to be very careful to apply only a small and constant amount of pressure. BTW, I wore latex examination gloves to avoid leaving fingerprints when handling the screen. To get straight lines I used an aluminum rail, but anything straight and rigid should do. The result is OK, although my lines are noticeably wider than the laser engraved lines you get on an off-the-shelf screen. You can see my quick and dirty DIY grid screen at http://www.aureumchaos.com/gitterscheibe/gravur.jpg (the upper center line was off on the first try, so now there are two lines symmetrical to the actual centerline). With a little practice you can probably do better than that. However, you should note that I used a screen from a T90, which is probably closer to the regular Ec screens like the Ec-C(II,III). The extra bright Ec-N might not be as tolerant to being scratched as the screen I modified. Regarding Malcolm's concerns about raised edges, I did a quick test with my screen after the modification and compared it to a regular screen and I did not notice any change in the plane of focus. I think any negative effects from the lines should be well below those caused by the uneven film surface you cannot avoid, anyway. If you are still concerned, you could use a very sharp knife or a small, fine file to make some grooves at the edges of the screen where the ends of the lines are so that the screen will rest on the untouched parts. Sorry I couldn't contribute to the paper format discussion as well ;-) Bye Martin * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
