Aug 16, 2011 · What is a parfocal lens, how is it different from any other lens, and what are the advantages and disadvantages for photography? Would you pay extra for this or prefer it over varifocal?

Nov 25, 2017 · Anyhow, as it explains, parfocal lenses usually have an independetly moving focus lens group that varifocal lenses lack - usually to keep costs, weight, and/or lens dimensions (as in …

Feb 3, 2016 · Parfocal optics. This means that the lens holds focus through the entire zoom range; a videographer can zoom into a subject, focus, and then zoom back out without needing to adjust focus.

According to this answer, parfocal lenses (lenses that can zoom in/out without losing focus) are relatively rare and more expensive. However, the original poster's kit-lens is parfocal. Additiona...

Sep 25, 2017 · The word parfocal just means that a lens (or microscope) doesn't change focus when the zoom setting (focal length) changes. In the case of microscopes, the zoom changes by swapping …

I have read a couple of related questions, but I am curious to find out if there is a list of parfocal/varifocal lenses out there. I'm most concerned with the lenses I have and I would like to kno...

Dec 2, 2019 · My question is: do the electronically parfocal Canon RF lenses maintain infinity focus well enough for fireworks photography that I can focus to infinity at one focal length (probably the longest) …

Jun 23, 2019 · I then zoomed in to 105mm end, and the focus scale was still at 3 meters. So, zooming doesn't affect the focus scale at all (it might affect how autofocus sees things, however). So, is the …

May 9, 2019 · I take photos of computer hardware for sale on ebay. I had been borrowing a camera for photos (Olympus SZ-16) and the camera will be able to focus while very zoomed in to a device while …

Sep 24, 2014 · Is this lens varifocal only when zooming in, and parfocal when zooming out? I read the theory that you can see better if you focus when you are zoomed in, but this camera has a 9.6x focus …