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Old Feb 1, 2011, 9:51 AM   #11
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Here is a cheap answer to your question. I have an extension tube set that I bought on line for $8.00. I used the shortest tube plus a 1.4X telextender on my Minolta 50mm f1.7 lens. This was shot at ISO 1600 under available light in total manual mode and hand held. Not the easiest macro setup to use but certainly the least expensive.
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Sony A57 with 18-55 kit lens, Sony A200 and Sony H70
50mm f3.5 Minolta Maxxum macro
24mm f2.8 Minolta Maxxum
100-300mm Minolta Maxxum APO Zoom
70-300 Sony apo G SSM Zoom

Last edited by Streets; Feb 1, 2011 at 10:00 AM.
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Old Feb 1, 2011, 11:03 AM   #12
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My main use for macro is copying old slides, using a rig I made. This one of Haunama Bay, Oahu, Hawaii was shot in October of 1969 and copied this morning using my Sony with short extension on the Minolta 50mm f1.7.
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Sony A57 with 18-55 kit lens, Sony A200 and Sony H70
50mm f3.5 Minolta Maxxum macro
24mm f2.8 Minolta Maxxum
100-300mm Minolta Maxxum APO Zoom
70-300 Sony apo G SSM Zoom
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Old Feb 1, 2011, 12:07 PM   #13
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Streets, Would you show the images of your side copier?

The Tamron 90mm does grow in length. Measuring mine I get 4 3/16 closed and 6 3/16 fully extended, without the hood, 5 17/32 closed and 7 17/32 fully extended, with the hood.

Measurements taken from the base with rear cap removed to the outside edge of the filter (in the case of the lens only measurements). The front element on the Tamron also rotates which may or may not cause issues for you.

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Old Feb 1, 2011, 1:06 PM   #14
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Quote:
Originally Posted by Old Boat Guy View Post
The Tamron 90mm does grow in length.
The front element on the Tamron also rotates which may or may not cause issues for you.
Steve
Every macro lens that is capable of focusing to infinity will grow in length. The longer the focal length, the greater the extension. Some lenses (usually macro zooms) will have focus limiters which can limit the degree of extension by locking out all focal lengths but those within a specific macro range.

My Tamron 90, which is the SP DI version does not rotate as it extends. My old Adaptall SP 90 macro does not either. Most dedicated macro lenses are calibrated in a straight line along the tube and so do not rotate as they extend.
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Last edited by penolta; Feb 1, 2011 at 1:15 PM.
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Old Feb 1, 2011, 2:48 PM   #15
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Here is the rig I use to copy slides. I mount my A200 at the rearmost hole. A white sheet of printer paper is placed behind the slide to serve as a backdrop. Because the slide and the camera always move together, slow shutter speeds and small apertures are no problem. The tie wrap serves to register the optimum height of the inserted slide. The camel hair brush is a must for removing dust from the slide.
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Sony A57 with 18-55 kit lens, Sony A200 and Sony H70
50mm f3.5 Minolta Maxxum macro
24mm f2.8 Minolta Maxxum
100-300mm Minolta Maxxum APO Zoom
70-300 Sony apo G SSM Zoom

Last edited by Streets; Feb 1, 2011 at 2:51 PM.
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Old Feb 1, 2011, 3:31 PM   #16
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"My Tamron 90, which is the SP DI version does not rotate as it extends."

I stand corrected. This one does not either. I am brain damaged and did not pay attention when I had it out for measuring.

Thank you for the images Streets

Steve
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Old Feb 1, 2011, 3:55 PM   #17
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The focusing distance is from the subject to the focal plane (image sensor) so whether or not the lens gets longer doesn't affect camera or subject position.
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Old Feb 1, 2011, 4:26 PM   #18
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Sorry I brought it up. But I learned something so thanks penolta.
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