Explain some optical mathematics
GraphyFotoz
Registered Users Posts: 2,267 Major grins
Ok I got a Tokina 0.45X AF High Def Digital Wide Angle Lens with Macro.
I put it on the front of my 28-90mm USM and it visually don't look a hellova lot wider.
What's the mathematics for this aka what it ='s for angle?:scratch
Also for my Sony 828 which is a 28-135mm.
I understand the mathematics when adding a Tcon but not for the front side of the lens.:dunno
It is fairly heavy so I realize I will hafta use manual focus on both cameras as to not kill the auto focus mech on either one.
I know the 1st comment "Why not just buy a wide angle lens"?
It was FREE so I thought I'd play with it.:D
I put it on the front of my 28-90mm USM and it visually don't look a hellova lot wider.
What's the mathematics for this aka what it ='s for angle?:scratch
Also for my Sony 828 which is a 28-135mm.
I understand the mathematics when adding a Tcon but not for the front side of the lens.:dunno
It is fairly heavy so I realize I will hafta use manual focus on both cameras as to not kill the auto focus mech on either one.
I know the 1st comment "Why not just buy a wide angle lens"?
It was FREE so I thought I'd play with it.:D
Canon 60D | Nikon Cooloix P7700
Manfrotto Mono | Bag- LowePro Slingshot 100AW
http://www.graphyfotoz.smugmug.com/
Manfrotto Mono | Bag- LowePro Slingshot 100AW
http://www.graphyfotoz.smugmug.com/
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