Tag Archives: test

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 UV Filter Test: Does coating make a difference?

I decided to do a quick test to see how my collection of 58mm UV filters damage image quality. I also took an image without a filter to see what difference using no filter makes. Why do I personally use filters? I want the added protection that a filter brings as well as the simplicity of cleaning a filter instead of the front element of the lens. I occasionally take … Continue reading

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Abstract submission to a gallery idea.

I’m part of a local photographer group on facebook and someone offered up the possibility of being in a gallery. I thought I might as well come up with an idea and see if the results were worth printing. Here is the description: “The idea is cell phone pictures, printed, matted and framed in recycled frames… Think sustainability. Go to goodwill, salvation army, or even reuse old frames around your … Continue reading

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Second SD and Micro SD card Speed Testing Article

The latest speed testing article (October 2017) is here. The first article on the speed of the SD cards I wrote was pretty successful. I get quite a bit of traffic from that, so I think people probably find it useful. The issue with writing follow up articles is that I’m limited to what I have on hand to test with (if you have contacts to acquire test cards let … Continue reading

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Preparation for the Otakon Convention (Lens Kit)

I’m thinking about what to bring to the “Otakon” Anime convention. As this is going to be a big trip for us, I wanted to bring my A-game. The K-5 body is still MIA, but I wanted to have two camera bodies available. I purchased a used *ist D camera body. That blurred coin in the image is a nickel, not a quarter! I just had the camera delivered a … Continue reading

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Comparison: FA 31mm f1.8 Limited to DA 40mm f2.8 Limited

The question was brought up on Pentax Forums recently “Is the 31mm Limited really 2.8 times better than the 40mm Limited?” As you can guess, the debate has been raging on for many pages. Here are the resulting images tagged on Flickr. They are all full sized with EXIF for your viewing pleasure. Later in this article I proved a big table with each image and general information with links … Continue reading

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Pentax Lenses: Auto-Focus (AF) Sound Test Roundup

I noticed people in general are interested in how each lens sounds (myself included), so I thought it would be helpful to put together a video demonstrating a set of lenses and how they sound when doing auto-focus (AF). This set is Pentax as it is the brand I use currently. The other benefits of this video is that you can get a feel for how the lens handles and … Continue reading

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SD Card Speed Testing (Secure Digital Memory Cards)

The latest speed testing article (October 2017) is here. Most of my largest articles happen on a whim. I think of an idea and then keep scaling it up as I think of ways to make the article even more interesting and useful. My initial though here was to see how my collection of SD memory cards faired write-speed wise. I found out that Ubuntu Linux has a disk benchmarking … Continue reading

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