H2ODoctor

H2ODoctor

Lives in United States CA, United States
Works as a Chemical Engineer
Joined on Jan 23, 2010

H2ODoctor's recent activity

  • I highly recommend the cotton carrier.  I use it with my 7D coupled with my 100-400.  It is compatible with my backpack and is easy to use.  I have recently seen a girl using one with a 300 F 2.8 ...
  • 500 mm actual focal length.
  • Created questions 500 mm
    How heavy do you think a 500 mm F5.6L lens would be? 4 pounds? 4.5 pounds?  5 pounds?
  • 500 mm L IS 5.6 100-400 with 4 stops IS, MFD 70 inches, .25 magnification, no push - pull and better IQ (F4-5.6)
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Total messages 91
Threads started 25
Last post 9 months ago
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