Leonard Migliore

Leonard Migliore

Lives in United States Sunnyvale USA, CA, United States
Works as a Engineer
Has a website at http://www.laserk.com
Joined on Jan 4, 2004

Leonard Migliore's recent activity

  • Ideally, the focus point of a zoom lens does not change with focal length; such a lens is termed "parfocal". Most zoom lenses are not so ideal here. Expensive video zooms are indeed parfocal, ...
  • There are a couple of threads on the forums here showing that filters degrade images from telephoto lenses more than they hurt shorter lenses. Probably because the absolute apertures of telephotos ...
  • Replied in Getting closer
    Those look pretty good. I have to abuse the images from my 70-300 pretty severely in Lightroom to get them to look OK. I use about +20 contrast, +10 vibrance, +40 saturation and about 50 ...
  • Your best bet is to contact Wix support. From a casual perusal of the Wix site, it appears to me that the Wix Store is just a mechanism for you to make sales of merchandise. As such, it seems to ...
  • Right. When the light is focused on the sensor, the light is focused on the sensor Right. Because we're using different colors of light. So you need to compensate Well, a sensor-based autofocus, ...
  • Keine Worte
  • This suggests the Albert Einstein quotation: "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”
  • I thought the D800 and D500 were two of the cameras that could operate the aperture in live view. I guess they're no good either. Can you change aperture in live view? In other words, set f/2.8 for ...
  • What camera do you have? The first Nikons with live view had a terrible implementation of it which made it very hard to focus with the lens wide open. Newer ones (at least some of them) do allow ...
  • Replied in What hurts?
    What is the thing that you are trying to figure out? One typically focuses a manual focus lens by looking through the camera's viewfinder and turning the focusing ring until the image is sharp. Do ...
  • Note that the Sony a68 is not a DSLR; it has an electronic viewfinder. Some people prefer these to optical finders and other people do not. In any case, they're different. You should try this out ...
  • On my monitor, the floor shots look properly exposed while the outside shots are far too light. Looking at the EXIF, all the shots were taken in Program mode but the outside shots have 1.7 stops ...
  • Replied in Oddly enough
    I have a G12 and I have found that a Canon 50D has very similar color. I have been happy with copies of artwork taken with both of those cameras. Of course the 50D is relatively obsolete but it's ...
  • The relative aperture (f-stop) of a lens is typically specified at infinity focus. When you use a lens at 1:1 magnification, the lens operates at twice its focal length from the sensor. So an 85mm ...
  • It's pretty straightforward. You need the rear element to be as big as the f/1 cone of light. You can't do this if the rear element is outside the mount and you can just barely do this if the rear ...
  • From the description, the lens operates at 1:1, meaning that the effective aperture is f/2. So that's no problem.
  • Replied in They lied to you
    You seem to be confusing G lenses with DX lenses. Nikon G lenses don't have aperture rings. They can be for DX (crop sensor) or FX (full frame) cameras. But more importantly, it doesn't matter. All ...
  • It's possible as long as you can put glass inside the mount such that its diameter is greater than the distance to the sensor. There isn't much room for that in an SLR because of the swinging ...
  • Actually, my illustrations were quite accurate with regard to the issue being discussed, which is how one would get an f/1 lens on a Nikon F mount. The constraint that we're fighting is that the ...
  • Depends how you stack it. If you keep the camera position the same, the perspective doesn't change; you just get everything sharp. The key to a painting is that the perspective changes with the ...
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Total messages 13685
Threads started 24
Last post 9 hours ago
Total comments 2
Total likes 0
Last post 3 weeks ago
Total reviews 0
Entries 1
Votes cast 0
Last entry May 6, 2015
Photos uploaded 127
Last upload Jan 24, 2010