General zoom lens theory question

[Marcus Friedlander]

Hello everyone,

I've got a quick question about zoom lenses.

I know that for aperture, if you are wide open, the lens won't perform as well as if you closed down a couple stops. Is there a similar line of logic when it comes to the zoom function of zoom lenses?

I.E. - the wide end of zoom lenses will generally perform worse than the long end, or maybe the middle third of the zoom range will be the sharpest?

And if it totally varies lens by lens, that would be great to know too!

Thanks in advance!

 

[Ilya O.]

Hi Marcus.

Wide end on nearly every zoom is the best spot optically. Thanks to Roger Cicala's testing, superb reading here:
https://www.lensrentals.com/blog/2017/03/rogers-law-of-wide-zoom-relativity/

 

[Marcus Friedlander]

Hi Marcus.

Wide end on nearly every zoom is the best spot optically. Thanks to Roger Cicala's testing, superb reading here:
https://www.lensrentals.com/blog/2017/03/rogers-law-of-wide-zoom-relativity/

Awesome! Thank you for the response and for that link. Exactly what I was looking for. Appreciate it!

 

[Marcus Friedlander]

Just finished reading! That was fascinating!!!! Thank you so much for sharing it!!!

 

[Ilya O.]

You're welcome, Marcus.

I'm happy you have read it full! I personally follow every piece at lensrentals blog with big interest, Roger has nice writing style and a sense of humor.

 

[Marcus Friedlander]

Absolutely! I'm definetly going to be following that blog closely!