misslisamham
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- Jun 10, 2015
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misslisamham said:I got a 55 and used it on my 80mm. It worked for super-tight macro shots (at f/22...), but focused only at a single distance from the subject.
are my options for getting the flexibility of the Mamiya C330's lens, described above? I am open to buying new lenses for the Hasselblad, or investing in a whole new system. Not wedded to square format.
Thanks!
I see a fundamental lack of comprehension of the principles of focus at macro vs. usual distances. Here are some very, very BASIC principles of focus...
- Ordinarily, how close to the subject a lens can focus is determined by the lens mechanism itself...it can only move away from the film plane by a certain distance, and this distance determines the minimum focus distance to the subject.
- A 'macro' or close focus lens is, simplified for conceptual purposes, a lens that can move FARTHER from the film plane than a conventional lens via its own built in focus mechanism, allowing the subject distance to be even closer than a conventional lens
- You can take a lens as described in #1, put an 'extension tube' between the lens and the film plane, to move the lens farther away from the film plane than its own mechanism permits, to allow the subject distance to be closer than usual, but because of the 'spacer' the lens CANNOT focus at Infinity without removal of the extension tube
- the extension tube as described in #4 determines the RANGE of FOCUS for the lens, yet the lens' own usual focus mechanism is used to focus at variable distances within that range of distance. (And, thic can be used to extended the range of focus of a macro lens even closer to the subject!)
A Mamiya RB67, or a Mamiya 645 with the very reasonably priced 80mm macro lens.
The later Mamiya 645 Pro, Pro-Tl or Super offer interchangeable backs. The relatively recent 645e or the older 645 models do not.
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