Categories
Lens

Yongnuo 100mm f2 Lens Details

I recently made a video about firmware v1.03. There are improvements in auto-focus performance, especially in live-view mode. Here is a link to full sized example photos on Flickr: Flickr Gallery Link You can pick this lens up on Amazon.com here. Here is a crop of one 100MM@f2 photo at 100% without additional editing: I’d […]

Categories
Technical & Testing

Quick Pentax Lens Test: Parfocal or Varifocal?

I did a quick test on three lenses that I have to see if they are Parfocal or Varifocal. If you are unfamiliar with those terms, Parfocal is a type of zoom lens that does not have focus shift when the lens is zoomed throughout the focal length range. This is a great feature for […]

Categories
Learning Series Video

Camera Lens Aperture Overview

Here is another learning series article and video. This time I go over the camera lens aperture. Youtube video link: The camera lens aperture is the variable opening inside the lens that lets more or less light into the camera. A small aperture has a larger number. See a full technical description of aperture on […]