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What exactly is the advantage of constant aperture in a zoom lens?

Started 4 months ago | Discussion thread

waynes

Contributing Member • Posts: 818

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Re: What exactly is the advantage of constant aperture in a zoom lens?

In reply to rogerstpierre, 4 months ago

rogerstpierre wrote:

To me it's pretty obvious. The longer the FL the more speed you need. Non constant aperture = slower speed when you actually need more speed. Not a good idea.

--
Roger

So true.

If 18-135 had reversed f3.5-5.6, it would be an unbeatable lens! Not the speed, but the DOF.

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Post (hide subjects)	Posted by	When
What exactly is the advantage of constant aperture in a zoom lens?	Simon Devlin	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	LightBug	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	MightyMike	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Celoman	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	wildkat2	4 months ago	1
The neighboura cat is a great subject for practice!	Simon Devlin	4 months ago
Re: The neighboura cat is a great subject for practice!	Simon Devlin	4 months ago
Re: The neighboura cat is a great subject for practice!	wildkat2	4 months ago
Re: The neighboura cat is a great subject for practice!	tdwesbo	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Gerry Winterbourne	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	awaldram	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Gerry Winterbourne	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	SRT201	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	awaldram	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Brooke Meyer	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Simon Devlin	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Brooke Meyer	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	rogerstpierre	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	waynes	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	awaldram	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Gerry Winterbourne	4 months ago	1
Re: What exactly is the advantage of constant aperture in a zoom lens?	bjake	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	Jim Beverlin	4 months ago
Re: What exactly is the advantage of constant aperture in a zoom lens?	viking79	4 months ago	2

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