PIX 2015
robot 1

robot 1

Joined on Nov 4, 2011

robot 1's recent activity

  • Elements have been cemented together since doublet lenses (1729), and lots of designs have them: almost all four element designs seem to have at least one cemented pair, etc. https://en.wikipedia.o ...
  • Were the coatings unaffected by the cleaning process?
  • I'd go for native F-mount, with an aperture ring to give G-lenses back this feature. Mark an 'A' position on the ring to move to Shutter priority. And shutter speed dial on top plate, but ...
  • Added 1 photo to their gallery
    last-supper
  • Replied in Jump up to FX?
    I would buy a D750, and use the lenses you have, for now. If you find yourself needing something different than what you have (more quality, or speed, or length), you then be able to make a ...
  • One of the reasons I stuck with AIS primes is 52mm filter threads, and that wide angles zooms have such massive filters. I didn't want to pay 50% of the cost of the lens on a circular polariser. Fi ...
  • No, you're talking about a specific case; I am trying to dissuade you from what I thought you meant by your statement: "Of course cameras will focus at any maximum aperture given enough light but ...
  • f/9 is not very far from f/8, so the angles are still sufficient to get some phase discrepancy. Your statement "cameras will focus at any maximum aperture given enough light" is not correct.
  • Not with phase-detection autofocus they won't. The minimum-required maximum aperture is stated not because it is an indication of how much light will be gathering, but because it defines the ...
  • Focal plane shutters for medium format had to travel much further than in 35mm, so their sync speeds were typically 1/30 or 1/40. Lens shutters allowed them up 1/500, only a stop more than high end ...
  • It is very hard to get even exposures with a lens shutter speed over 1/500 s. When we get CMOS sensors with global electronic shutters in SLRs, then we won't need anything to get higher sync ...
  • No, I don't think it will. Both combinations are f/8. The aperture determines the angle of light available to the phase-detection system.  See: http://www.clarkvision.com/articles/understanding.aut ...
  • The polariser is cutting out light that is polarised in the direction perpendicular to the fine slots in the filter. In daylight outside, the light coming from reflections that have become ...
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Last post Nov 4, 2011
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