Thanks, I'd forgotten about that. I thought about trying to calculate
it but it didn't take long to realize I don't have the info to do so. I
know the flange focal distance for a C-mount lens (17.526 mm) but have
no idea of the angle of view of any of the lenses.
Chuck Norcutt
On 8/26/2016 7:23 AM, Wayne Harridge wrote:
Those lenses will cover a larger image circle if used in macro (lens
extension).
...Wayne
-----Original Message-----
From: olympus
[mailto:olympus-bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx
] On Behalf Of Chuck Norcutt
Sent: Friday, 26 August 2016 9:39 AM
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Subject: Re: [OM] Macro gear
Then what's wrong with this Elgeet 38mm f/1.9 for $50?
<http://www.ebay.com/itm/ELGEET-LENS-38mm-f-19-ROCHESTER-NEW-YORK-/331933452
486?hash=item4d48c688c6:g:b0cAAOSwH6lXQjtF>
or this 38mm f/1.8 for $25?
<http://www.ebay.com/itm/Elgeet-38mm-f1-8-Opto-Navitar-Telephoto-Lens-/25250
6961393?hash=item3aca9675f1:g:gc4AAOSwqfNXl6pi>
And regarding any of these C-mount lenses they're only designed for an image
circle for 16mm film. Even if they cover Super 16mm that's only about 7.4 x
12.5mm whereas 35mm is 24 x 36mm and even 4/3 is 17.3 x 13.5mm. That's only
about 40% of even a 4/3 sensor.
Chuck Norcutt
On 8/25/2016 9:09 AM, Dean Hansen wrote:
Wayne H. posted:
"I came across this (totally by accident):
http://extreme-macro.co.uk/raynox-adapter-techniques/
Has anyone here had any experience with these Raynox adapters ?"
Well, not me, at least.
My preference is to use a lens designed to do macro if one wants
to do macro. Which is why I went with the OM system back in the '80s.
The OM
38/2.8 macro lens is an entomologist's prayer answered. Wanna get closer?
Then the in-a-class-all-by-itself OM 20/2 is what you grab. Even
closer, and it's an Elgeet 7/2.5 regular 8mm movie camera lens from
the '50s, reversed. That trick is macro to the max, and on the cheap.
Like $15 cheap. John Shaw's "Closeups in Nature", p 126-127, planted
that bug in my ear.
Gotta try focus stacking with that Elgeet sometime.
Prices for the 38/2.8 have softened some in the last few years.
I've seen them on ebay for $350-ish lately. Hellava deal, if you ask
me. If there ever were a lens designed specifically to do macro, and
do it well, this is it, hands down.
Dean
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|