Recent content by david_horne_9964

Thanks Scienceguy Labs. I noticed that with the 950 nm filter, the camera can't quite focus all the way to infinity. I believe a -1 or -2 diopter is required. I'll try that later.

Very nice msirapian !

I bought 4 IR filters with different cut-off wavelengths. This is my first quick test. These photos were taken at 10 AM on an overcast day in Southern California. . Please comment or ? Thank ? to keep me motivated to perform and post more testing of all sorts on the Nokia 1020. . Please see my...

Keep it ! At $700, the closest consumer camera you will find is the sigma dp-1 Merrill. . http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=sigma+dp-1+merrill&rh=i%3Aaps%2Ck%3Asigma+dp-1+Merrill&t=wpcentral00-20&tag=hawk-future-20&ascsubtag=UUwpUvbUpU2882698

belodion, please read this article testing the new Sigma 50mm, f1.4 lens. You'll see that high end lenses have improved dramatically over the last few years and now produce phenomenal results at wide apertures. By their own admission, resolution at f2.8 is limited only by the 22MP sensor used...

Maximum sharpness of a 35mm film lens tends to f5.6. Sharpness is limited by diffraction on one end ( higher number, smaller opening ) of the aperture scale and film diffusion on the other end ( lower number, wider opening ). This information is widely available and verified by my own testing. (...

repeating the video to see if " the powers that be " will let me post video now ! Grrrrrrr ! . https://www.youtube.com/watch?v=vtcUTRM42_0 .

I should point out that, just going by the numbers, the SD-1 should top the 1020's resolution by about 27%. That would put it at about 130 on my chart. This is equivalent to 645 color film resolution. This number fits nicely with Sigma's aim on their new top end lenses like the 50mm f1.4. My...

Wow Arup Roy Chowdhury, I wish I had a SD-1 ! I have experimented with emulating a much larger aperture lenses for the 1020. I've posted one result already and will be posting more as a do them. One problem I am running into is chromatic aberration. I believe this is due to the very wide focal...

I should point out that Sigma now makes a 46MP DSLR but it is priced out of my reach !

Yes belodion, maximum sharpness of a 35mm lens tends to f5.6. Sharpness is limited by diffraction on one end of the aperture scale and film diffusion on the other end. Since film diffusion is no longer part of the equation, it's back to the drawing board for maximum sharpness. My advice is to...

I've done a good deal of testing with the 1020. Shown is a resolution test with the 1020 in DNG mode. I judge the resolution at 100 LP/mm ( 35mm equivalent ). For comparison, my 14MP Sigma only makes it to about 50. My friends 20MP Canon earns about 65. 35mm color print film maxes out at about...

Thanks again to jmshub for posting my video. I've done a good deal of testing with the 1020. Shown is a resolution test with the 1020 in DNG mode. I judge the resolution at 100 LP/mm ( 35mm equivalent ). For comparison, my 14MP Sigma only makes it to about 50. My friends 20MP Canon earns about...

Many thanks to jmshub for posting my video.

This is video from the 1020 with a +4 HMC diopter The max focal range is about 2.5 feet but it yields excellent result. . v=vtcUTRM42_0 . I have been informed that I may not post links as I don't have 10 points. Gee, that's really too bad as I am an engineer giving my application designs freely...