Convert orf to pnm Online: orf2pnm
You can use Tom's Editor to easily convert images from
Olympus Digital Camera Raw Image File .ORF to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Olympus Digital Camera Raw Image File is an image format with extension ORF.
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.