An optivisor is an inexpensive way to magnify. There are replaceable, lenses of different strength for them.
McMaster has them. www.mcmaster.com. Enter page 2250 at
the McMaster site.
On that page they are called "Headband Flip-UP Magnifiers".
Lynton McKenzie book "Engraving Techniques and Smoke Prints" has 16 pages of how-to information for H&C engraving written by Lynton. 34 pages of
enlarged engraving prints that Lynton made of his work. Click
here for more information and ordering.
Subheadings from book
Engraving - by Lynton McKenzie
Flat Gravers and Chisels
Work Method -Driving a Chisel
Face Sharpening for 45 Degree Angles
Hand Graver-Work Method
Work Method - (45 degree face)
Work Method - Heel
Mounting the Work
Smoke Prints (there are 34 pages of prints. On one page will be the prints as they appear, and on the facing page there is a negative image for
ease in viewing. )