tag:blogger.com,1999:blog-10666456.post117640112688471578..comments2024-01-08T15:04:49.691-06:00Comments on Dean W. Armstrong: IR filtrationDean W. Armstronghttp://www.blogger.com/profile/01775475819534188248noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-10666456.post-24497541795929428702007-04-15T10:41:00.000-05:002007-04-15T10:41:00.000-05:00The camera is extremely near-sighted without a hig...The camera is extremely near-sighted without a highly concave lens in front of it, because I took out the IR-block filter which lies in the converging light path of the lens. This changes the focus dramatically. The normal focus for this camera is now just an inch away from the lens. You can replace the filter with a piece of glass with the same thickness, but I don't have any pieces small enough.<BR/><BR/>My particular highly concave lens is a 2x teleconverter from a film camera, and it doesn't completely cover the field of view of the digital camera, giving you the vignetting.Dean W. Armstronghttps://www.blogger.com/profile/01775475819534188248noreply@blogger.comtag:blogger.com,1999:blog-10666456.post-1176631215173675892007-04-15T05:00:00.000-05:002007-04-15T05:00:00.000-05:00That's neat looking. Why is the viewable area cir...That's neat looking. Why is the viewable area circular?Anonymousnoreply@blogger.com