Jirka-

Jirka-

Lives in Czech Republic Prague, Czech Republic
Works as a clinical psychologist
Joined on Jul 3, 2010

Jirka-'s recent activity

  • I think focal plane shutters are used only in cameras with exchangable lenses Nearly all cameras with fixed lenses have leave (in the lens) shutter. The leave shutter is part of the lens. ...
  • So far, none of my several cards have failed. However, quite recently I was in a situation when I had a camera, several lenses, an old photo bag, and no memory card. Searching in the bag I have ...
  • I wonder how can any photographer know which card is more reliable. Memory card failure is a rare event. You would have to test extensively hundreds of cards of the same brand and type to get any ...
  • Even if depth of field is not an issue, using a selectable focus points has its advantages. You can keep the subject  focused in the viewfinder and wait for the best moment to press the shutter ...
  • Unlike using the nondominant hand it seems to be quite easy for most people accustom to use the other eye. Even in old age when you develop a glaucoma it does not make much difference which eye is ...
  • I do not about the last few years but over the last decades the number of manufacturers is decreasing. Sure, these manufacturers make more models, but lot of these models share the same basic ...
  • The left half of the visual field of both eyes is projected to the right visual cortex, the right half of the visual field to the left visual cortex. With normal eysight you can see equally well ...
  • Maybe cross polarization would not help in this case, however metallic surfaces certainly do not depolarize the light. Otherwise you could not see the effect of a polarizing filter through a SLR ...
  • Do you need a 16 bit RAW? Why? Some high end cameras  make 16bit RAW files e.g. Hasselblad. 14 bit raw has over 16000 brightness levels in every channel. Why is that not enough for you? The ...
  • Every Canon/Nikon/Pentax DSLR camera less than 4- 5 years old can make pictures a s good as a new camera except in very low light. The problem is to convince a teenager that this is really true. ...
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Total messages 496
Threads started 7
Last post 9 months ago
Total comments 2
Total likes 6
Last post Nov 12, 2012
Total reviews 0
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Photos uploaded 26
Last upload Aug 21, 2011