</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Prime @ Oct 29 2002, 08:28 PM)</td></tr><tr><td id='QUOTE'>Once I started enlarging 4x5 negatives I had trouble using grain focusers because there wasn't much grain. Is there a technique or a special type of focuser that could make it easier? Thanks.</td></tr></table><span id='postcolor'>
I might suggest the obvious:
It may help to focus with the enlarging lens aperture wide open. In addition to providing the most illumination possible, it will make the apparent field of focus narrower and the ideal focus will be more easily seen.
Second, there is always the option of using a "Substiitute - Test" negative, either/ or a coarse-grained image or gray field (read: Fast film developed in Rodinal) or one with a fine pattern (lines, dots, resolution target, etc.) to be used for focusing and then replaced with the "real" negative.