| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "I don't know the specs of the blue paper I use for custom white balance. The idea is to flood the blue channel with light (when using a blue filter..." | Read more » | almost 9 years ago | |||
| cfastie | "I hadn't considered aperture as a reason for the vignetting. I assume it is related to the angle at which the light enters the filter. Dichroic fil..." | Read more » | almost 9 years ago | |||
| cfastie | "The entrance slit should be parallel to the grating lines. I don't recall that anyone found that spectral quality is improved with one side or the ..." | Read more » | almost 9 years ago | |||
| cfastie | "I think the Public Lab Store will ship filters to Europe: https://store.publiclab.org/collections/diy-infrared-photography/products/infragram-diy-f..." | Read more » | almost 9 years ago | |||
| cfastie | "I took another batch of photos (research note soon) with ISO 200 and the shutter speed at 1/30 second. The f-stop varied between f/2 and f/5.6. It ..." | Read more » | almost 9 years ago | |||
| cfastie | "In these experiments, the bubbler will increase the humidity in the chamber or room. That alone could reduce the dust in the air (by dampening the ..." | Read more » | almost 9 years ago | |||
| cfastie | "Hi Parth, The primary difference between your two photos is exposure. The bright one is overexposed. If there is software that allows you to contr..." | Read more » | almost 9 years ago | |||
| cfastie | "Thanks for the tip about cheaper SD card modules and RTC modules. I see now how you made your pro-mini logger for $13.00. One of those sensors I l..." | Read more » | almost 9 years ago | |||
| cfastie | "I am really impressed with the new tutorial. Thanks for that great effort. This definitely lowers the barrier for me to try this. I just dove into ..." | Read more » | almost 9 years ago | |||
| cfastie | "That's excellent. Maybe a good order of magnitude cheaper than a FLIR camera. There seems to be a typo in the description of the IR range covered ..." | Read more » | almost 9 years ago | |||
| cfastie | "When the kmz file (attached in the previous comment) is loaded in Google Earth you must click "Exit Photo" to regain control of Google Earth. Then ..." | Read more » | almost 9 years ago | |||
| cfastie | "Lots of people have used MapKnitter to place images that are not aerial photos they have taken. Some of these are older aerial photos which must be..." | Read more » | almost 9 years ago | |||
| cfastie | "Hello, Some experiments suggested that viewing the spectrum at a slight angle (from perpendicular to the grating) produced a clearer image of the ..." | Read more » | almost 9 years ago | |||
| cfastie | "I guess you are referring to the video on this page: https://publiclab.org/wiki/spectral-workbench-usage, which is this video: https://www.youtube...." | Read more » | almost 9 years ago | |||
| cfastie | "What video are you referring to? What spectrometer are you using? What light source are you using? Chris " | Read more » | almost 9 years ago | |||
| cfastie | "We can't see methane because visible light passes right through it. DIY infrared cameras based on consumer cameras can't detect methane because nea..." | Read more » | almost 9 years ago | |||
| cfastie | "The Bayer filters determine how wavelengths are separated into the three color channels. This is how the camera can sense the balance between the t..." | Read more » | almost 9 years ago | |||
| cfastie | "This is very good data -- two independent reports that moss grows under deciduous forests in Sweden. Martenskram suggested two hypotheses that coul..." | Read more » | almost 9 years ago | |||
| cfastie | "If bubbling room air through an aquarium removes some dust from the air (including some silica dust) then growing diatoms in the water is not requi..." | Read more » | almost 9 years ago | |||
| cfastie | "Black surfaces do not reflect much light, but they do reflect some. Some black surfaces might reflect more green than other colors, and other black..." | Read more » | almost 9 years ago | |||
| cfastie | "McMaster Carr sells aluminum strips 1/16" thick in widths between 1 1/2" and 2" (in various lengths). So a one foot long piece would cost less than..." | Read more » | almost 9 years ago | |||
| cfastie | "I like Pat's idea of bolting through a juice bottle. Removing the neck of the bottle could allow good access to the camera, but the bottle shoul..." | Read more » | almost 9 years ago | |||
| cfastie | "That's an awesome crash test. I think taking advantage of the tripod socket is a really good idea. The little tripod head you use is more than you ..." | Read more » | almost 9 years ago | |||
| cfastie | "@liz, I'm glad you appreciate my fowl sense of humor. " | Read more » | almost 9 years ago |