Re: Canon digital SLR questions

On Sat, 25 Mar 2006 21:02:01 -0500, "Joe S." <anon@xxxxxxxx> wrote:

I have several accessory lenses for these cameras -- all lenses are Canon
Ultrasonic EF in focal lengths from 28mm to 400mm -- some are fixed lenses,
some are zoom. Also have two Canon flash units -- I forget the model
numbers but one is small, the other is a big sucker.

I'm thinking about investing in a Canon digital SLR and have some questions:
1. Will my current lenses work on the digital SLR(s)?

Yes. They will behave as if their focal lengths are 1.6 times longer. If
you try using the 400mm with a focal extender you may have problems with
autofocus- it depends on the specific DSLR and lens.


2. Do the digital SLRs have a mirror that "slaps" up when the shutter is
released, or, are they silent (like old focal plane cameras such as the
Leica M1, M2, M3, etc.)

Yes, although the mirror slap is pretty gentle. But if you are
astroimaging, you should configure the camera to put the mirror up a few
seconds before opening the shutter- something the Canon DSLRs are
capable of.

One other thing... your Canon flashes will probably not work very well
with the DSLRs. The digital cameras handle the through-the-lens flash
metering very differently from the film cameras. As a result, the older
flash units usually behave like much more basic devices.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
.

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