Tag Archives: Coastal Optics 60mm F4

ZWO ASI178MM-cooled – UV imaging (part 2)


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Having tested the ZWO ASI178MM-cooled for UV imaging, and found that it is very capable for such invisible band imaging, I decided to take it to the next level of testing to see what are the limits to its capabilities. My subject is the more well known Dandelion flower which I had picked from my back garden. This flower has been imaged many times in UV, so it is sort of a reference flower for UV imaging. Continue reading ZWO ASI178MM-cooled – UV imaging (part 2)

Winter Jasmine


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There seem to be quite a few winter jasmine flowers in bloom now. Does that mean it is winter already? Anyway, I thought I would pick one back to shoot indoors. I have photographed this flower before, but I thought it would be good to reshoot this in my indoor mini studio, particularly with my IDS2e filter. Continue reading Winter Jasmine

Pink Consolida ambigua

Update: I’ve finally identified this flower as consolida ambigua. This flower has come up in my back garden from a pack of mixed seeds. Unfortunately I do not have an identity for this. Hopefully someone will be able to chime in with the name. Multiple images were shot and then stacked with Helicon focus to achieve deeper depth of field.

Continue reading Pink Consolida ambigua

Sony NEX-5N – UV imaging


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I remember few years ago when i first owned the Sony NEX-3 and used it for UV-imaging. Unfortunately the custom white balance range was not sufficient to properly white balance in UV for the jpeg files. This issue was fortunately resolved by the NEX-5N (4th camera in the NEX range) which had a wider white balancing range. I had sold my NEX-5N a while ago, and hence could not test this again until I borrowed my friend’s copy. Continue reading Sony NEX-5N – UV imaging

UV-pass filters: infrared suppression test


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I was working on some images on Capture One pro and then I had a thought. How about looking at the infrared (IR) suppression capabilities of some of the UV-pass filters I have. I do have the Baader U 2011 version, the latest 2013 Baader U version which is said to have better IR suppression than the previous models. Also, I thought I would test my U340 1mm + S8612 1.5mm stack for comparison. Continue reading UV-pass filters: infrared suppression test

Sunflower (indoor)


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As there were so many smaller sized sunflowers growing in my garden, I decided to cut one down to bring indoors to shoot. This would serve as a good subject when comparing cameras in UV. But I thought it would be good to get some studio shots of this to put in the flower gallery as well. Continue reading Sunflower (indoor)

Blue-eyed grass


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This flower (Sisyrinchium spp) was growing along the side of a path at Stowe Garden. Hence I paused to take photos of it with the various filters I had with me. Continue reading Blue-eyed grass

Pink geranium


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I managed to pick a pink geranium to photograph in my indoor studio. I was particularly interested in shooting this in UV-induced visible fluorescence and stacking the images to increase the depth of field. Continue reading Pink geranium

Rudbeckia hirta Irish eyes


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This is another variety of Rudbeckia I have growing in my garden. It had popped up a little while ago but then seemed to have vanished before I had a chance to photograph it. Now that it has reappeared, I thought I should shoot it before it disappears again. Images were stacked with Helicon focus. Continue reading Rudbeckia hirta Irish eyes