Category Archives: Technical & Testing

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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Examine and clean a Pentax K-7 rear dial.

The rear dial on my K-7 has been having issues for quite a while. Scrolling left especially didn’t work properly. The aperture would jump around randomly and even cause the camera to temporarily lock up. After my successful modification of the K-01, I was feeling confident enough to take the K-7 apart to see if I could do something about it. In the past I tried the old trick of … Continue reading

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Replacing the Pentax K-01 Grip

Here is my previous article about the Pentax K-01 I recently got. The only one available locally was a demo unit with a yellow grip. I personally don’t like that shade of yellow and wouldn’t feel right using it in professional situations, but the deal was good and I couldn’t pass it up. I was able to acquire one of those fake K-01 display models to use as parts. If … Continue reading

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Camera Flash Communication Methods Comparison (TTL vs E-TTL i-TTL p-TTL) and Thyristor Auto Mode

I talk about camera flash communication methods (TTL vs E-TTL i-TTL p-TTL) as well as thyristor sensor based auto mode. Here is the Youtube video: Diagram for TTL and pre-flash based TTL methods: Standard TTL: This was the original method of flash power control. It happens as the film/sensor is being exposed to light. There is a dedicated sensor near the film that monitors the reflected light off of the … Continue reading

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