Chuck's question is easier to answer:
Remember two principles:
The shorter the focal length on a given format, the greater the depth of
field;
The smaller the format on a given focal length, the greater the depth of
field.
In this case we have a very short focal length on a very small format. The
image is producedinitially as an aerial image on the focal plane of the CCTV
lens, which the macro lens then "emlarges" to fill the 35mm format.
Does that help any?
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Chuck Norcutt
Sent: 10 September 2005 23:34
To: olympus@xxxxxxxxxx
Subject: [OM] Re: OM macro lenses?
Darin Rhein wrote:
> Hello Piers,
>
> I'm very intrigued by the possibility of getting more depth of field
> from a macro lens. I was wondering if you could show us some photos of
> your creation, and some examples of photos you've made with it? Also,
> what brand cctv lenses did you use?
------------------------------------
Yes, to what do we attibute large depth of field?
Chuck Norcutt
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