Zooming and focussing

[Ann Bens]

That looks beautiful.
I have a look at the lens.
Thanks for your input.

Some of Nikons lenzes are a bit beyond my budget.
Is there much difference between Sigma, Tamron, Samyang and Tokina.

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[Brian Cheng]

Hmm…. I’m very unexperienced here….
How do I tell if my lens is a par-focal or a vari-focal lens?
When I open the lens’ user’s manual, it just said “Canon EF-S18-55mm f/3.5-5.6 IS STM lens is a high-performance standard zoom lens equipped wIth an IS, and has been developed for EOS cameras compatible with EF-S lenses”.

Help~~~

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[Steve Crow]

Brian,

I can’t tell you absolutely for sure but here’s what I strongly suspect – since this lens isn’t even a fixed aperture and is not one of the super high end models I very much doubt it is safe to use the zoom in, focus and zoom out method.

Steve Crow