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Peter Lin
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If you ever visited some industrial surplus shops, very often you would see some cameras and lenses used in industrial automation. But you probably do not know that these lenses can have very high optical performance and features we want: high resolving…
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  I have been asked many, many times if it is safe to build a Y cable to connect two flashes together so that both can be controlled by one single input. The intent is to fire two or more flashes at same time. The answer is probably. Why? Because by…
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I was thinking about building a delay circuit quickly and effectively and with small footprint. The idea is to delay a signal either from a camera or from other camera triggering devices and then trigger a flash after the delay. Beside my need to build…
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I was bored with Raspberry Pi 3B because my AlexaPi project had to be on hold. Why? Well, it seems the credentials that Amazon issued to me as developer expire pretty fast, I was only able to play with it for about a week. It was fun and exciting to play…
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Very often I encounter a beautiful image with black background but with a slight set back — the background is not as “black” as the author (and I) intended to be. And again often, you can see lots of photoshop efforts to make it black, such as spotty…
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In last blog, I covered general thoughts about using C-mount lenses on MFT or super 16 cameras, I think it is time to do some testings on these cheap C-mount lenses. APS-C coverage C-mount lenses are getting more popular than ever, here are two first…
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Ever since I bought the Panasonic GH5, I was shocked by the fact that lenses for Micro Four Thirds (MFT) cameras are so expensive. Though, I am able to salvage my Canon lenses by using an adapter with and without speed boost glasses, I am still in search…
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I have been asked many times about why there are streaking patterns around border of final stacked image. Well, the most common cause of these streaking patterns is due to the optical instruments used — the magnification of optical instrument changes when…
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I have just encountered the need to read a digital dial indicator for another personal project. However, most of these digital dial indicators are “expensive” (normally cost about 30 – 100 USD), so I figure to just get a cheap digital caliper costing…
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Admit it, you have encountered this, after so much effort capturing images for stacking and painfully waiting for stacking software to finish, you ended up with an image with a lot of haze. So much so, your skillful Photoshop tricks can’t help it. Oh OK,…
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