![]() ![]() Wood ceiling of my office, about 1.5 m above camera, same setup. Removed the Hero 4 lens, temporarily placed a UV Rodagon 60 mm with Baader U on a focusing helicoid atop the camera, suspended a flower about 40 cm above the camera, and illuminated it with MTE 3W UV flashlight from about half a meter away. Perhaps I will need a second Hero 4 after all? Perhaps I could make some preliminary test by just removing the Hero standard lens, though. The Rib-Cage modification does not allow the use of the Gopro water-tight case, for one thing, and is essentially a one-way process. I have everything on order, but might decide to use the Hero 4 unmodified on a coming vacation in July, before I start hacking it. Not more expensive than a semi-pro ordinary lens for a system camera, but still a purchase to consider only if no good accidental lenses are available. I would expect the Universe Kogaku lenses to cost very roughly in the ballpark of US$ 1,000-1,300. A Pentax-110 to C commercial adapter does not exist, but I might permanently epoxy these lenses into C extension tubes. The Pentax-110 24 mm f/2.8 is so minuscule that it would look too small even on a Hero. The first two have an image circle too small for Micro 4/3, but should cover the Gopro sensor. If no one has tried so far, I guess I will be the test monkey.Īmong the accidental UV lenses I tested at, I am planning to test on the Hero 4 the Mir 11 in C mount (12.5 mm f/2.2), Vega 7 in Kiev 16U mount (20 mm f/2) and the Pentax-110 18 mm f/2.8 and 24 mm f/2.8. There might be show-stoppers like a UV-cut coating on the sensor package. Therefore, before doing the modification, I would be interested in hearing whether anyone can confirm that the Gopro Hero, and specifically the Gopro Hero 4 Silver/Black, is usable in UV. Among other things, the sensor is moved from deep within the camera body to flush with its front plate. Installing the kit involves a complete disassembly of the camera. A few months ago, I did find some C and convertible to C lenses that are reasonably good in UV, and a few dedicated lenses in C mounts designed for UV imaging are also available. Rib-Cage also offers an even more overpriced, already converted range of Gopro cameras. However, Rib-Cage makes an overpriced modification kit that allows use of S, CS and C lenses. It uses an S mount (M12 x 0.5) lens attachment, and lenses of this type are hardly exciting. The second big question is whether UV-capable lenses are available for this camera. I have no information, however, on whether it is usable in UV. NIR and multispectral (VIS+NIR) videos after removing this filter or replacing the lens are available on YouTube, so there is no question that the camera is NIR-capable. Strictly speaking, it does not need to be converted to multispectral, since the standard lens has an IR-cut (and presumably UV-cut) filter attached at its rear. Now, given that we are on the Ultraviolet Photography site, the first natural question is whether the Gopro Hero can be used for UV photography. ![]() This is clearly not a replacement for our multispectral converted system cameras, but on the other hand it can do some things that most of our cameras cannot do, and is extremely small and lightweight. There are also plenty of limitations, like no flash sync, no AF, and lens choice restricted to S-mount lenses. Some models have a built-in touch LCD screen, others can use one as accessory. A mobile phone app can be used as remote control, or a dedicated remote is available. All solid-state (no mechanical shutter), built-in Bluetooth and WiFi. Interesting capabilities (not available in all models, or simultaneously) are video up to 4k resolution and up to 240 fps, up to 12 Mpixel still pictures single or in bursts of up to 30 fps, time-lapse video and still pictures, low-light mode, and quite a few other features. The sensor is 5.76 mm by 4.29 mm, bigger than that of a typical webcam but smaller than system cameras. Parts of some commercial TV series and movies have also been shot with these cameras. Many of the craziest action sports videos on YouTube have been shot with Gopro Hero cameras. Gopro updates its models about once a year, and so far they have remained slightly more advanced (and more expensive) than the competition. The Gopro Hero is one of the first, and probably most popular, small action cameras. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |