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RE: [OM] Long Focus vs. Mirror Lens

Subject: RE: [OM] Long Focus vs. Mirror Lens
From: "Daniel J. Mitchell" <DanielMitchell@xxxxxxxxxxxxx>
Date: Fri, 1 Feb 2002 11:22:16 -0700
> Don't forget that mirror lenses lose about a stop to the middle mirror, so

> you wouldn't need an Neutral Density filter in daylight unless your ASA
was 
> over 400, even with 1/1000.

 This is another interesting point, actually; I can see two possibile setups
here:

 1. lightweight kit
 2. heavyweight kit

 If I'm carrying the lightweight kit, I have the mirror lens, and probably
don't have a big hefty stable tripod. This means I'm really going to _want_
to be up at 1/500th or faster to avoid shake issues.

 If I'm carrying a hefty enough tripod with me to ensure stability, I can
probably also afford the weight of a genuine telephoto lens, so I get
aperture control back.

 -- dan (hm. I should try one of these out to see how I like it; I'm almost
tempted again just because of the portability issues, and the
worst-lens-is-the-one-back-in-the-car problem)

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