Thierry Legault

Thierry Legault

Lives in France France
Has a website at www.astrophoto.fr
Joined on Jul 8, 2012

Thierry Legault's recent activity

  • Replied in Nikon D810a
    It's true that if you leave the original white balance on a DSLR modified, it will give a reddish tint. But with a personalized white balance, there is no more reason for that. The balance ...
  • Replied in Nikon D810a
    Hi Michael, I agree that SCTs have long FL but many amateurs use them and get good results. Do not forget that a Sony A7s on a 11" Schmidt-Cassegrain (preferably a Edge HD), with its focal reducer ...
  • Replied in Nikon D810a
    The specific feature (modified IR-cut filter) is useful only for nebulae that emit in Hydrogen-alpha line, in deep red (656 nm). For nightscapes, you would get more red nebulae in the Milky Way, ...
  • Replied in Nikon D810a
    I suppose that you wanted to mean "short focal length". For long FL (above 2000mm), the pixel size is needlessly small: one will record turbulence and tracking errors, at the expense of sensitivity. ...
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Total messages 40
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Last post Feb 13, 2015
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