Re: [APML] question about mirror lockup...

[Roland Roberts <roland@astrofoto.org>]

>>>>> "Jeff" == Jeff Crilly <jlcphoto@myrealbox.com> writes:

    Jeff> I have a nikon EM SLR 35mm body which seems to do fine for
    Jeff> astrophotography.  ...
    [...]

    Jeff> Anyhow, I've been using the "self timer" to lockup the
    Jeff> mirror before taking an exposure.  I'm not seeing any
    Jeff> vibration in the photos so I think this technique is good.
    Jeff> Afaik, the camera doesnt have a specific mirror lockup
    Jeff> function.

I'm not familiar with this camera, so I'm not sure what the self-timer
is buying you....

I have taken a large number of wide-field piggyback shots and consider
MLU completely unnecessary there.  I've recently started a series of
phases-of-the-moon shots at prime focus through a 127mm f/12.1 Mak-Cas
and use the MLU of my Pentax KX there.  I've been using it
religiously, so I don't have any real comparisons.  I suspect that
between first and third quarters, the shutter speeds are fast enough
that this may not matter.

roland
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Roland B. Roberts, PhD                             RL Enterprises
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