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: Flickr Gallery Link 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 … Continue reading

Posted in Lens | Tagged , , , , | Comments

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

Posted in Technical & Testing | Tagged , , , , , , , | Comments

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

Posted in Learning Series, Video | Tagged , , , , , , , | Comments

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

Posted in Question & Answer | Tagged , , , , , , , , , , | Comments

Lens Review: Pentax DA 18-55mm F3.5-5.6 AL

This lens was available from 2004 until around 2008 as the primary kit lens for Pentax DSLRs. Currently you can find it around at used camera lens sites like KEH or auction sites like eBay. It’s easy to find and very cheap. This is actually my second AL lens as I sold my first and acquired this one when I bought a used *ist D camera body recently. The 18-55mm … Continue reading

Posted in Lens, Reviews | Tagged , , , , , , | Comments

Q&A: Aperture and blur, convention lenses, canon flash, and Gary Fong accessories…

More question and answer time! I answered this question before the last one I posted, but didn’t get around to posting this one. 🙂 question. having worked with a number of nice lenses, how big a difference would you say the difference between a 1.2 and a 2.8 aperture makes? I think it depends on what you are interested in doing. If you are not interested in super smooth background … Continue reading

Posted in Opinion, Question & Answer | Tagged , , , , , , , , | Comments

My thoughts on the Pentax Q

If you haven’t noticed, Pentax will be joining the small sized mirror-less interchangeable lens camera club. There is a lot of information out for the camera excluding sample photos. Here are a few images borrowed from Pentax USA and the USA president Ned’s blog: Now I’ll give some opinion on what I see as the positives and negatives of this new camera and lens system… First off, I’ll go over … Continue reading

Posted in News, Opinion | Tagged , , , , | Comments

DA* 300mm and Kenko 1.5x Pz AF at the Airshow Absolute Sharpness

I had a request to provide unprocessed full resolution images from the airshow I went to recently where I used the K-5, DA* 300mm f4, and Kenko 1.5x Pz AF teleconverter together. I’ll be providing a few images with 100% crops straight from camera raw default settings for your viewing pleasure. First, here is some detail on the teleconverter if you don’t know about it: http://photographybanzai.com/2011/01/29/kenko-pz-af-1-5x-teleplus-shq-with-sdm-auto-focus/ The first image shows … Continue reading

Posted in Article, General, Photography, Practice and Testing, Various Events | Tagged , , , , , , , , , , , | Comments