LCT

LCT

Lives in France France
Joined on Apr 3, 2004

LCT's recent activity

  • You said that CoC has nothing to do with DoF and now that there is a difference between DoF and hyperfocal distance! Aside from doing those (indeed) simple calculations for many years, i suggest ...
  • 0.03 is shown in all my raw converters. Or 0.02 for APS-C, even 0.022 for my M8.2. I did not invent those numbers, not sure what your point is exactly. Best, LCT
  • As far as i recall (seventies) the Leica's average CoC value has always been 0.03mm. Can still be seen in current Leica's exif data. I mean out of FF bodies of course (M10, perhaps SL/SL2). APS-C ...
  • Or course it makes a difference in the real world. We can see it all the time if we use both FF and APS cameras for instance, let alone small sensor cameras. At least it makes a difference for me ...
  • All DoF formulas are based on CoC. This one for instance: H = f^2 / Nc, f being the focal length, N the f-number, and c the circle of confusion. You may wish to take a look at good DoF calculators ...
  • Not sure what i should add to be clear. DoF is based on 3 factors: Focal length, aperture and circle of confusion (CoC). And CoC is based among other things on the size of the sensor. So if you ...
  • Not sure to follow you here. CoC values are used in Leica DoF tables and exif data already. Those are average values of course but the matter is well known since the last century. Best, LCT
  • I do not recommend anything. CoC values are made for prints and take them into account already. Best, LCT
  • 100 iso indeed otherwise you will have the feeling to use a 10,000 iso camera :D. I did not sell mine but i use it only for fun to be honest. It has an excellent IQ though with a great lens. Also ...
  • Here are my "simple tips" from 2004. Dates me i guess... Just history. Now i would use 100 iso only and do "poor man's raw", i.e. all settings set to low to reduce noise as far as possible before ...
  • All this is taken into account in CoC values. The ones used in DoF tables and exif data (0.03 for FF, 0.02 for APS-C etc.) are just average values one may change at will but DoF will always depend ...
  • There are three factors for DoF: focal length, aperture and circle of confusion (CoC). As CoC values depend on the sensor size, among other factors, DoF depends on that size necessarily. Best, LCT
  • DoF changes only if the area of the sensor changes because DoF is based on CoC (circle of confusion) and CoC is based upon the area of the sensor among other things. Best, LCT
  • No problem if you don't notice it. I do unfortunately but not on film Ms nor mirrorless cameras, only digital rangefinders, namely Epson R-D1, Leica M8.2 and Leica M240. Only culprit the lens ...
  • The M-Rokkor 40/2 for Minolta CLE is a lens from the eighties whereas its old brother (for Minolta CL) is a clone to the Summicron-C from the seventies. Mais differences the CLE version is lighter ...
  • No problem on mirrorless cameras and the Rokkor works fine on my M240... except that i don't like either 35mm or 50mm framelines with any 40mm lens on this body. Too wide or too tight for me so i ...
  • On what camera? Rangefinder? If so my Rokkor 40/2 for Minolta CLE has no significant focus shift. Very good lens otherwise. Same rendering as the Summicron-C with a bit less flare. Usual issue ...
  • Bought my R-D1 in 2004 and the 40/1.4's focus shift issue was reported on the Epson forum this very year or in 2005 if memory serves. I did not buy the lens for this reason but the CV 35/1.4 SC ...
  • It is a very good lens from the seventies with same kind of rendering as other Leitz lenses from this era like Summicron 35/2 v3 or Summicron 50/2 v3. Not the sharpest lenses at f/2 which is fine ...
  • https://www.l-camera-forum.com/topic/308190-voigtlander-40-14-focus-shift/
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