Please help me cre­ate the ef­fect of a mag­ni­fy­ing glass

ImagineFX - - ImagineNation -

Amy Bloque, Poland

An­swer

Nick replies

Read­ers who wear spec­ta­cles will be fa­mil­iar with the ben­e­fits of dis­tort­ing lenses to com­pen­sate for eye­sight de­fi­cien­cies. I count my­self in that large group. Yet folk of­ten worry about paint­ing such dis­tor­tion ef­fects, when they should be lick­ing their lips at the fun you can have.

If pho­to­graphic re­al­ism is the goal, then good ref­er­ence is al­ways go­ing to be the best way to go. But this isn’t the ap­proach that I want to take with this ques­tion. Ac­cess to some lenses to peer through will def­i­nitely help, though.

Con­vex lenses tend to mag­nify, while con­cave do the re­verse. The fun be­gins when the cur­va­ture and/or lens thick­ness vary, so that ob­jects may be mag­ni­fied or re­duced more in the cen­tre, com­pared to the edges. It de­pends on the strength of the par­tic­u­lar lens. Each has its own spe­cific fo­cal length that can mean ob­jects ap­pear fuzzy or sharply fo­cused, de­pend­ing on how far from the lens it is. Th­ese vari­ables are what make things in­ter­est­ing. If you re­ally want to go to town you can play with re­flec­tions on the lens sur­face, scratches, dust and im­per­fec­tions. But it’s best to master the ba­sics first.

I place the var­i­ous lenses in the scene first, and then con­sider how the mag­ni­fy­ing ef­fects would look.

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.