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archer
Joined: 20 Jan 2002
Posts: 4
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 Posted: Mon Jan 21, 2002 4:01 am Post subject: |
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| Can anybody comment on the use of macro lenses on the crown or speed graphics? Is it practical to make greater than 1:1 and up to 1:10 images on the 4X5? |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Mon Jan 21, 2002 4:12 am Post subject: |
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Read the thread in SPEED GRAFFIC HELP titled MACRO Questions by iangrant.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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Dan Fromm
Joined: 14 May 2001
Posts: 2144
Location: New Jersey
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| Posted: Mon Jan 21, 2002 12:10 pm Post subject: |
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On 2002-01-20 20:01, archer wrote:
Can anybody comment on the use of macro lenses on the crown or speed graphics? Is it practical to make greater than 1:1 and up to 1:10 images on the 4X5?
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I'm playing with that right now. I have a bunch of Tominon lenses for the Polaroid MP-4 and a shutter they'll screw into. The shutter is on a Graphic board. I also have a couple of Zeiss and Reichert macro lenses and have to have adapters made so I can screw them into a shutter. I already have adapters to use all of these lenses on a Nikon.
My first impressions are that the 17/4 and 35/4.5 Tominons are fine lenses. At 20 x and wide open, the 45/4.5 Zeiss Mikrotar is better than the 50/3.5 Reichert Neupolar is better than the 50/4.5 Tominon. Same hold at 8x. At 4x and wide open the 100/6.3 Neupolar is better than the 100/6.3 Zeiss, which is supposed to be (I have doubts) a Luminar. I don't have a 105 Tominon for comparison. At 1:1 the 100 Neupolar is better than a 4"/5.6 Enlarging Pro Raptar I got for shooting at 1:1, but f/11 - f/16 (have to shoot film to test) may be another story.
The limiting factors for photomacrography with Graphics are a combination of extension and focal length. The magic formula for extension (from film plane to lens' rear nodal point) needed to get desired magnification is:
extension = (1 + magnification) * focal length.
You can see that with a normal lens, the most you can get is 1:1. A Graphic's maximum extension is twice the normal lens' focal length. So if you want to get higher magnification you have to use a lens that is shorter than normal.
There is a section on high-magnification photography in the 1st edition of Graphic Graflex Photography, with a couple of spectacular shots taken with a Graphic and a B&L Micro Tessar.
So the short answer is, get some lenses and try it. Tominons and MP-4 shutters go for not very much on eBay, other large format macro lenses go for lots more. Polaroid sold a number of versions of the Copal #1 Press shutter. I like the MP-4 version most because it has an "open shutter" lever, the others just have a "T" setting.
Hope this helps,
Dan |
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