## Veijo Vilva's recent activity

• It is mathematically impossible. For 4 RGB pixels you need 4 x 3 = 12 values and you have just 6 equations to solve for them, 4 from the top layer and 1 from each lower layer. The output for a 2 x ...
• It is a trivial exercise to show that it is impossible however refined the math. Consider a 2x2 quad, the exact sensitivities of the top layer do not matter as the same result can be obtained ...
• My first adapted lens arrived built inside this After extracting the lens, adapting it for M42 and testing on a Praktica LLC, I bought an EOS350D for it in order to take photos like this: Not much ...
• Well, I didn't have a single native or other EOS mount lens for my EOS350D and EOS5D bodies during the 8 years they were my main cameras, only adapted MF lenses, so the question wasn't about the ...
• My main platform is Nikon 1, my secondary platform is Fuji X
• Even a Nikon 1 J5 does 20 Mp at 60 fps
• The output is exactly the same whether it says 72 dpi or 300 dpi. As far as the image quality is concerned, the dpi value is just an arbitrary number. Whatever the dpi value, the number of pixels ...
• Voigtländer APO-Lanthar 180 mm f/4 Close Focus for M42, I used it earlier on EOS350D and 5D Mk. 1, now on Nikon 1 V1 and Fuji X-E1. It focuses down to 1.2 m, weighs about 450 g without an adapter, ...
• The dpi value has nothing to do with shooting or the resulting image file, see https://en.wikipedia.org/wiki/Dots_per_inch , especially the section "DPI or PPI in digital image files". 72 dpi used ...
• A macro lens also "steals" light. Nikon 105/2.8 is only f/4.8 at 1:1 magnification.
• At light levels requiring the use of extremely high ISOs, the limits to IQ aren't dictated by the technology but by the very limited number of photons available at an individual pixel site within ...
• The Elmar-R 180/4 is reasonably sharp with a nice bokeh and about 25% lighter than an Elmarit-R 135/2.8 II. I really liked it on my EOS350D and EOS5D. However, my main cameras now are Nikon 1 V1s, ...
• The only way to get a significant boost is a drastic drop in Mp because already the main source of noise in J5 at low light or fast shutter speeds is the fluctuation in the small number of photons ...
• Created discussion thread Leitz Elmar f = 9 cm 1:4 from 1934
This old Elmar is one of my favorite lenses on my Nikon 1 V1. It is uncoated so the contrast is low, but the resolution is very good, even on the V1, which has a pixel density corresponding to ...
• A Jupiter-6 at about 1500 g is in another league. Here mounted on an EOS350D: A bokeh example:
• I mostly use MF lenses with my V1s and need my left hand to control the lens. The placement of the camera controls on a V1 is more convenient than on a V2 as all the controls are accessible with ...
• Most commonly dynamic range and SNR of a camera are defined in 20 log dBs, not 10 log dBs, so you need to divide those values by 2. See, e.g., https://en.wikipedia.org/wiki/Decibel , Video and ...
• In photography 88 dB ~14.8 EV, 120 dB = 20 EV  ( 1 EV = 20 log10 2 dB = 6 dB )
• Jupiter-3 50/1.5 LTM Nikkor-H•C 1:2 f=5 cm LTM Voigtländer 75/2.4 Color Heliar LTM Leitz Elmar 9 cm 1:4 (1934) I use these lenses mainly on a Nikon 1 V1 but also on a refurbished Fuji X-E1, which I ...
• Replied in Fuji QC
Well, for a real retro look, here is a sixty years old Nikkor H.C 50/2 (Leica Thread Mount), my favorite MF lens on my slightly modded X-E1, note the similarity to the new XF 35/2.
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 Total messages 272 Threads started 19 Last post 6 days ago
 Total comments 4 Total likes 7 Last post Sep 10, 2014
 Total reviews 0