Sigma 70-200mm f/2.8 II APO EX DG Macro

bluebronco · 04-21-2011, 11:59 AM

Is this lens considered a true macro?

Mike.P® · 04-21-2011, 12:32 PM

Originally posted by bluebronco

Is this lens considered a true macro?

No.

I don't actually know of any zoom that is a true 1:1 macro.

bluebronco · 04-21-2011, 12:43 PM

Kind of what I thought.
What does it take to turn my Pentax F-50mm f/1.7 into a macro? I don't quite understand extension tubes or reverse mounting.

Any suggestions?

Mike.P® · 04-21-2011, 03:15 PM

A full set of tubes or something like a Raynox DCR-250.

**Ash** · 04-22-2011, 02:25 AM

Or even a 49mm reversing ring with extension tubes.
If you're willing to drop the kind of money it costs to buy a Sigma 70-200 just for the macro feature, you may as well get yourself a DFA 100mm f/2.8 macro WR, which is smaller, cheaper and lighter, whilst being a true 1:1 macro with excellent image quality to boot.
Other cheaper options include the Tamron 90mm f/2.8 macro, Sigma 70mm f/2.8 macro, Sigma 105mm f/2.8 macro or even Pentax DFA 50mm f/2.8 macro. All of these are true macro lenses.

gp1806 · 04-22-2011, 06:27 AM

Originally posted by bluebronco

What does it take to turn my Pentax F-50mm f/1.7 into a macro? I don't quite understand extension tubes or reverse mounting.

Any suggestions?

Kenko made an auto focus extension tube. It's very hard to find. You can make your own. Buy a cheap auto focus 2x teleconverter on ebay and remove the glass elements. Very easy to use, just mount the teleconverter to your K20 and mount your 50mm to the teleconverter. Instant close focus ability. All functions of the K20 still work.

04-21-2011, 11:59 AM	#1
bluebronco Senior Member Join Date: Feb 2008 Location: Iowa Photos: Gallery \| Albums Posts: 170	Sigma 70-200mm f/2.8 II APO EX DG Macro Is this lens considered a true macro?

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04-21-2011, 12:32 PM	#2
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	Originally posted by bluebronco Is this lens considered a true macro? No. I don't actually know of any zoom that is a true 1:1 macro.

04-21-2011, 12:43 PM	#3
bluebronco Senior Member Join Date: Feb 2008 Location: Iowa Photos: Gallery \| Albums Posts: 170 Original Poster	Kind of what I thought. What does it take to turn my Pentax F-50mm f/1.7 into a macro? I don't quite understand extension tubes or reverse mounting. Any suggestions?

04-21-2011, 03:15 PM	#4
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	A full set of tubes or something like a Raynox DCR-250.

04-22-2011, 02:25 AM	#5
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Or even a 49mm reversing ring with extension tubes. If you're willing to drop the kind of money it costs to buy a Sigma 70-200 just for the macro feature, you may as well get yourself a DFA 100mm f/2.8 macro WR, which is smaller, cheaper and lighter, whilst being a true 1:1 macro with excellent image quality to boot. Other cheaper options include the Tamron 90mm f/2.8 macro, Sigma 70mm f/2.8 macro, Sigma 105mm f/2.8 macro or even Pentax DFA 50mm f/2.8 macro. All of these are true macro lenses.

04-22-2011, 06:27 AM	#6
gp1806 Veteran Member Join Date: Mar 2009 Location: Chicago suburbs Photos: Albums Posts: 848	Originally posted by bluebronco What does it take to turn my Pentax F-50mm f/1.7 into a macro? I don't quite understand extension tubes or reverse mounting. Any suggestions? Kenko made an auto focus extension tube. It's very hard to find. You can make your own. Buy a cheap auto focus 2x teleconverter on ebay and remove the glass elements. Very easy to use, just mount the teleconverter to your K20 and mount your 50mm to the teleconverter. Instant close focus ability. All functions of the K20 still work.