focus
focus


Author Comment Last activity Moderation
mathew "thank you for these conversion details and trying to get to the bottom of this problem. " | Read more » almost 10 years ago
patcoyle "Chris, excellent well documented tips. I appreciate your continuing effort to advance the quality of results from these tools. " | Read more » almost 10 years ago
MrBumper "I don't know if this will clarify anything, but I'm finding using a laser beam from a red laser pointer quite useful in examining what goes on with..." | Read more » almost 10 years ago
cfastie "I don't know whether you could see a clear projected image of the spectrum. I think you could, but it would rather small and dim. I also don't know..." | Read more » about 10 years ago
wizard "Wow... excellent information... thanks. I am a newbie, and my questions will be indicative of that.... I see now that I may assemble two spectrome..." | Read more » about 10 years ago
cfastie "Ivan, Yes, the plugin to make the file pairs list requires some study. It also requires that you have: synchronous pairs of VIS and NIR photos al..." | Read more » about 10 years ago
ivalethia "I belive the problem is in the first plugin ("Create dual image list" ), 'cause I don't understand from where this file (list) comes, do I create i..." | Read more » about 10 years ago
cfastie "Let us know which parts of the user guide (PhotoMonitoringPluginGuide.odt, at Github) you need help with. Chris " | Read more » about 10 years ago
ivalethia "Hi Chris (@cfastie). Can you help one more time? I can't make it work with the plugin in Fiji (also in ImageJ), could you put it in simple words ho..." | Read more » about 10 years ago
ivalethia "After add the IRCut filter in the IPCam, with the GIMP (@Warren) method, I get this: It looks like go better according the color scale (except t..." | Read more » about 10 years ago
cfastie "Okay, I think I understand now. What you did is: remove IR block filter from a camera take a photo take the same photo with exposed and developed..." | Read more » about 10 years ago
ivalethia "Hi Chris (@cfastie). This pictures (the third in every serie of 3) are not produced directly from the camera, as you say. First, I take a picture w..." | Read more » about 10 years ago
cfastie "Replacing the camera's IR block filter with exposed, developed, color print film allows only near infrared light to be captured. These IR photos ar..." | Read more » about 10 years ago
cindy_excites "Gracias por esto! Muy interesante! " | Read more » about 10 years ago
cfastie "I think most small Powershots use an IR block filter that is 8.9 x 7.9 mm. That's the advertised size of the BG3 glass filter I put into an A2200 a..." | Read more » over 10 years ago
ttaylor "Chris, do you remember/know the dimensions of the A2200 hot filter? " | Read more » over 10 years ago
tmoravec "the reason for the fast fallof at 600+ nm is IR filter on the CCD/CMOS chip of the camera. I am currently working on similar problem. I need to cal..." | Read more » almost 11 years ago
Roolark "@Cfastie, That post from Tom was the one I was referring to in my idea #2 but yeah, I must have misread it. Still, regarding #1, I do understand..." | Read more » almost 11 years ago
cfastie " Interesting idea. Some IR blocking filters are "hot mirrors" which are coated to reflect IR. Maybe it's possible to remove the coating (but maybe ..." | Read more » almost 11 years ago
Roolark "Couple quick thoughts on the filter/clarity issue. For starters, I just ordered an a2200 for the infra blue purposes from eBay, so I haven't had a ..." | Read more » almost 11 years ago
cfastie "The Canon A2200 (refurbished) is on sale today (November 21) for $48.99 (free shipping) with a one year warranty: http://shop.usa.canon.com/shop/e..." | Read more » about 11 years ago
cfastie "The aperture mechanism definitely varies among Powershots. By peering into the front of the lens I learned that the high end ones have an actual ir..." | Read more » about 11 years ago
timmm063 "Have you considered watching other sites for cameras that are refurbished? One I would recommend is canonpricewatch.com. It also shows prices for o..." | Read more » about 11 years ago
danbeavers "The filter should have nothing to do with the difference in quality between the center and edge of the image since it is uniform in density. Lense..." | Read more » about 11 years ago