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10-06-2007, 08:09 PM   #1
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Tamron 28-75/f2.8 with closeup lens?

Anyone used a closeup lens with Tamron 28-75/f2.8 before?

I am interested to know what is the result.

If I use a +3 closeup lens, can I get 1:1 macro?

10-06-2007, 08:34 PM   #2
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Just get some extension tubes. They won't spoil the quality of your 28-75.

Cuz close up lenses are essentially magnifying lenses and will cuz distortion.
10-06-2007, 08:52 PM   #3
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I second FotoPete's opinion and the added benifit is you can use them with all your lenses that are suitable for macro work.
10-07-2007, 03:10 AM   #4
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thanks for the tip.

There is this extension tube Extension Tube Macro Ring for Pentax dslr K100D K10D - eBay Nikon, Digital Camera Lenses, Digital Cameras, Lenses, Cameras. (end time 10-Oct-07 00:22:12 AEST)

Someone did comment before that this might not have the aperture lever so I might not be able to adjust the aperture from the body. Is this, nevertheless, still acceptable? I can't find an extension tube for the pentax mount with aperture level. Even if I do, I think the price might be exceedingly high and I could not afford it.


Last edited by raider; 10-07-2007 at 03:30 AM.
10-07-2007, 06:43 AM   #5
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By the look of this unit you'd stop down Manually. That's not an issue really as long as the lens you use has an aperture ring, which yours does. Since most close up macro work takes a little time to set up. Tripod, manual focus and manual exposure. So you'd just leave the lens wide open and focus the scene. Then once that's done stop the lens down and set the exposure with the camera in manual. Takes a little practice but is easy once you're used to it. If you have a prime lens like any 50mm K mount you'll get even better results (sharpness) than the Tamron. I have this lens and it's very good but a good 50mm would be even sharper.

You might find the information on these earlier threads of some value as well:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/11161-answer-macro-question.html

Edit: BTW this set you found is a pretty cheap way to get started and I notice you have a 50mm f1.4 so you could be doing some decent macros fairly cheaply with either lens. (the advantage of the 50 is also that wide open it will be easier to focus as it is so much brighter)

Last edited by Peter Zack; 10-07-2007 at 06:56 AM.
10-07-2007, 05:23 PM   #6
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Thanks Peter! Very well explained I must say.
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