TiffToPDF can directly convert tiff into PDF.

Supports virtually all TIFF compressions, including ZIP,LZW,CCITT G4/G3, JPEG, Packbits. Outstanding compression. Combine multiple tiff files into one PDF file. Supports many processing modes. Supports Multi-page tiff file to PDF conversion . Does NOT need Adobe Acrobat software . Supports sorting on file name when converting batches . Can set automatic skew-correction (of B/W images). Supports scanner. Page layout setting. Password protection for PDF files with 40 or 128 bit encryption. Set file permissions to restrict printing, copying, and future modifications to the document. Specify any resolution(DPI) in the generated PDF file. Optimized to increase speed. Set the document info (title, subject, author and keywords, creator) . Append to existing PDFs. Supports monitor batch convert. Support watermark,viewer setting.