An approximate lens formula: i/f = o/d
Use this formula to get an idea of what lenses will work in what space, what area of subject a lens will cover at closest focusing distance.… Read More An approximate lens formula: i/f = o/d
Category: Lenses
Why faster lenses focus quicker and more accurately
Why you might want to consider a faster lens even if you don’t think you need the wider aperture – because they can focus faster and more accurately.… Read More Why faster lenses focus quicker and more accurately
Rob Sheppard 