Tag Archives: 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: https://www.flickr.com/photos/152056770@N07/albums/72157685978716892 You can pick this lens up on Amazon here. Here is a crop of one 100MM@f2 photo at 100% without additional editing: I’d personally consider that is producing a nice amount of detail, especially without any editing. There are a … Continue reading

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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 video work because the photographer can achieve focus and zoom without the need to refocus. … Continue reading

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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 Wikipedia: http://en.wikipedia.org/wiki/Aperture Also important is the f-number that explains what the aperture number means: http://en.wikipedia.org/wiki/F-number … Continue reading

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Q&A: Help me find a quality normal prime lens?

Already another question and answer post! Keep them coming. 🙂 Sharing information is a great way for everyone to learn. Edit: I have to say, I like the way he thinks. Why waste money on an inferior lens if you will eventually replace it? Opting to start with that 50-135mm f2.8 lens was a good idea. I’d say, If you have the cash, it is often a good idea to … Continue reading

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