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[OM] Vivitar 2x-teleconverter for Hasselblad: RESULTS

Subject: [OM] Vivitar 2x-teleconverter for Hasselblad: RESULTS
From: Chris Crawford <chris@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 14 Mar 2009 19:10:44 -0400
A couple weeks ago I mentioned my first time using a Vivitar 2X
teleconverter with my Hasselblad and the 150mm f4 CF-Sonnar lens to get an
effective 300mm f8 lens. I shot it at f22, for an effective aperture of f45.
At that aperture, as we noted, even the best lenses are limited by
diffraction to a resolution of less than 10 l/mm (Someone, I think it was
Chuck Norcutt, said the actual number was only 8!). The image looks pretty
good nonetheless! Here's a scan of it, and a couple of 100% crops.

http://www.chriscrawfordphoto.com/family-snapshots/vivitar-hassy2x/

What do you guys think? I paid very little for the 2x, I think it was $35
from eBay. I wonder if the closest Hasselblad lens to this combo, the 250mm
f5.6 CF-Sonnar would be any better given that I had to use such a small
aperture for the depth of field needed to keep the whole sign and the
foreground building facade sharp.


-- 
Chris Crawford
Fine Art Photography
Fort Wayne, Indiana
260-747-3962

http://www.chriscrawfordphoto.com  My portfolio

http://blog.chriscrawfordphoto.com  My latest work!


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