The subject of contrast and flare has gotten my attention recently. Is the utili zation of lens hoods so common with 35mm and medium format worth considering in large format? Anyone out there with experience on this subject? My initial incli nation is that the positive benefits of a lens hoods for large format photograph y is not considerable or the manufacturers would be pushing these acccessories. I use screw in filters and wondered if the two are compatible? Thanks in advance .